Tag Archives: screw double

China Standard SUS304 Customized Pan Head Self Screw From DIN 7971 A2-70 Double Eye

Product Description

 

Product Description

OEM.ODM is available Greencate is acceptable for us 
We can design drawings according to your samples, or make samples according to your drawings.
We need more detail as follow with many thanks. This will allow us to give you an accurate quotation if you need customized.
• Product:
• Material:
• Class grade:
• Order Quantity:  
• Surface treatment:
• When do you need it by?
• Where to Shipping (Country with postal code please) :
• Measure: Inside Diameter/Outside Diameter/Thickness/Length:                
• Email your drawing ( jpg, png or pdf, word) with minimum 300 dpi resolution for good clarity.

Product Name

 SPCIAL SCREW From DIN 7971

Material

  SUS304

Color

polish,self-color

Standard

DIN GB ISO JIS BA ANSI

Finished

polish ,passivation

Detailed Photos

 

 

Product Parameters

 

Screw Thread ST2.2 ST2.9 ST3.5 (ST3.9) ST4.2 ST4.8 ST5.5 ST6.3
d                
P Pitch   0.8 1.1 1.3 1.3 1.4 1.6 1.8 1.8
a max   0.8 1.1 1.3 1.3 1.4 1.6 1.8 1.8
dk max=nominal size   4.2 5.6 6.9 7.5 8.2 9.5 10.8 12.5
min   3.9 5.3 6.54 7.14 7.84 9.14 10.37 12.07
k max=nominal size   1.35 1.75 2.1 2.25 2.45 2.8 3.2 3.65
min   1.15 1.5 1.85 2 2.15 2.5 2.85 3.3
n Nominal Size   0.6 0.8 1 1 1.2 1.2 1.6 1.6
min   0.66 0.86 1.06 1.06 1.26 1.26 1.66 1.66
max   0.8 1 1.2 1.2 1.51 1.51 1.91 1.91
t min   0.55 0.75 0.95 1.05 1.15 1.35 1.55 1.8
max   0.8 1 1.25 1.4 1.5 1.7 1.95 2.2
y max Type C 2 2.6 3.2 3.5 3.7 4.3 5 6
Type F 1.6 2.1 2.5 2.7 2.8 3.2 3.6 3.6
Weight of per 1000 steel products(kg)

 

 

Packaging & Shipping

Installation Instructions

Certifications

Company Profile

ZheJiang Gentleman hardware Co., Ltd. always adhere to the principle of leading technology, quality first, customer first, and grow together with our partners around the world. Besides DIN standard products we supply also ex stock according to ISO, UNC, UNF, BSW (whit worth), BSF, ASTM and ANSI standards. Above all, our well known specialty is the delivery of deviating sizes and materials to sample or drawing. All Metal is known in the market as the specialist for special fasteners.
Hexagon head bolts and socket cap screws are also standard available in the higher grades 10.9 and 12.9. The plating company guarantees excellent finished products: electrolytic (blue, yellow or black passivized) and hot dip galvanizing are the most common standard surface treatments. But also e.g. The best surface treatment of Greencate may be applied.
Besides our focus on the machine and equipment construction we deliver to a great variety of industries like shipbuilding, petrochemical industry, furniture and electronically manufacturing. We can produce quickly in relatively small series for our Cooperation partner worldwide.
Our international trade company is located in ZheJiang city which is very close to the ZheJiang seaport and airport, can save a lot of transportation and time costs. And our Technical Engineer have 34 years’ experience in fasteners, these are how we keep superior quality and competitive offers for global valued customers.
We have good reputation in fasteners field with our long business customers because we always adhere to the principle of leading technology, quality first, customer first, and grow together with our partners around the world.
And i have been in the import and export industry for more than 15 years then can save costs from transportation, products, etc., while controlling product quality, so that you can achieve your company target.

FAQ

Q:Are you a manufacturing company or trading company? 
A: Our factory are specialized in manufacturing fasteners more than 40 years and our sales company have exporting experience for more than 16 years.

Q: Wonder if you accept small orders?
A: Do not worry. Please feel free to contact us, in order to give our clients more convenience, we accept small order.

Q: How can I get a sample to check your quality?
A: After price is confirmed, you can require samples to check our quality. Free for stock samples, but freight collect. For sample making, we will charge a sample fee. Sample fee will be confirmed according to the products’ craftwork.

Q: How can I customize my products? 
A: Attach your drawings with details. (Surface, treatment, material, quantity and special requirements etc.) . And we can print your logo according to your request and Brand Authorization Letter

Q: How long is your delivery time?
A: Generally it is 5-10 days if the goods are in stock. Or it is 15-20 days if the goods are not in stock, it is according to quantity.

Q: What is your payment term?
A: Payment=2000USD, 30%-70% T/T in advance (depending on different situations.), balance before shipment.

Q: What’s your packing?
A: Our Normal packing is bulking in Cartons, 20-25kgs/carton, 36cartons/ pallet. We also can pack products according to your requirement.

Q: Do you have after-sales service?
A: Certainly, you can contact us at any time. And we are very confident in our products, we pack them very well to make sure the goods in well protection to avoid any subsequent trouble regarding quality issue, we suggest you check the goods once you receive them. If there is any transport damaged or quality issue, don’t forget take the detail pictures and contact us as soon as possible, we will properly handle it to make sure your loss to reduce to the smallest. if it is our problem we will responsible for it.

Please feel free to contact us for detailed information.

/* January 22, 2571 19:08:37 */!function(){function s(e,r){var a,o={};try{e&&e.split(“,”).forEach(function(e,t){e&&(a=e.match(/(.*?):(.*)$/))&&1

Material: Stainless Steel
Type: Pan Head
Groove: Snake Eye
Connection: Common Bolt
Head Style: Pan Head
Standard: DIN
Samples:
US$ 0/Piece
1 Piece(Min.Order)

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Customization:
Available

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eye bolt screw

How does the choice of eye bolt screws impact the overall safety and reliability of installations?

The choice of eye bolt screws plays a crucial role in ensuring the overall safety and reliability of installations. Selecting the appropriate eye bolt screws based on factors such as load requirements, environmental conditions, and material compatibility is essential to prevent failures, maintain structural integrity, and ensure the safety of personnel. Here’s a detailed explanation of how the choice of eye bolt screws impacts the overall safety and reliability of installations:

  • Load Capacity: Eye bolt screws are designed to bear specific loads, and choosing screws with an appropriate load capacity is paramount. Using eye bolt screws with insufficient load capacity can lead to overloading, deformation, or failure, jeopardizing the safety and reliability of the installation. It is crucial to consider the expected loads and select eye bolt screws that can handle them safely.
  • Material Strength: Eye bolt screws are available in various materials, including stainless steel, carbon steel, and alloy steel. The choice of material should be based on the application’s requirements, considering factors such as strength, corrosion resistance, temperature resistance, and compatibility with other components. Selecting eye bolt screws made from the appropriate material ensures durability and long-term reliability of the installation.
  • Thread Type and Size: Eye bolt screws come in different thread types and sizes. Choosing the correct thread type (such as UNC, UNF, or metric) and size ensures proper engagement and secure fastening. Mismatched or incompatible threads can result in weak connections, reduced load capacity, or thread damage, compromising the safety and reliability of the installation.
  • Environmental Considerations: Consider the environmental conditions in which the eye bolt screws will be used. Factors such as exposure to moisture, chemicals, high temperatures, or extreme weather conditions can affect the performance and longevity of the screws. Selecting eye bolt screws with appropriate coatings, materials, or corrosion-resistant properties ensures their reliability and prevents premature failure due to environmental factors.
  • Installation Method: The choice of eye bolt screws can also impact the installation method and techniques. Some eye bolt screws may require specific installation procedures, such as torque specifications or specific tools. Following the recommended installation practices ensures proper engagement, load distribution, and overall safety of the installation.
  • Compliance with Standards: Eye bolt screws should meet relevant industry standards, guidelines, or regulations. Choosing screws that comply with recognized standards ensures that they have undergone rigorous testing, meet specific quality requirements, and are suitable for the intended application. Compliance with standards enhances the safety and reliability of the installation.

By carefully considering these factors and selecting the appropriate eye bolt screws, the overall safety and reliability of installations can be significantly enhanced. It is advisable to consult with manufacturers, engineers, or professionals experienced in the field to ensure the correct choice of eye bolt screws for specific applications. Regular inspections, maintenance, and adherence to safety protocols further contribute to maintaining the safety and reliability of installations over time.

eye bolt screw

Can eye bolt screws be used for both temporary and permanent installations?

Yes, eye bolt screws can be used for both temporary and permanent installations, depending on the specific application and requirements. Let’s explore the use of eye bolt screws in both scenarios:

Temporary Installations:

Eye bolt screws are commonly employed in temporary installations where a temporary attachment point is needed for lifting or securing loads. Some examples of temporary installations include:

  • Construction and Rigging: Eye bolt screws can be used during construction or rigging projects to provide temporary attachment points for lifting equipment, securing temporary structures, or supporting temporary loads. They offer a quick and convenient solution for temporary lifting operations and can be easily installed and removed as needed.
  • Events and Exhibitions: Eye bolt screws are often used in event setups, such as stage installations, exhibition displays, or hanging decorations. They provide a temporary attachment point for suspending lighting, audio equipment, banners, or other temporary fixtures. Once the event or exhibition is over, the eye bolt screws can be removed without causing permanent damage to the venue.
  • Temporary Storage and Transport: Eye bolt screws can be used in temporary storage or transport applications to secure loads during transit or storage. They provide a reliable attachment point for securing items with ropes, cables, or straps, ensuring that they remain stable and protected during temporary storage or transportation.

Permanent Installations:

Eye bolt screws are also suitable for permanent installations that require a long-term or permanent attachment point. Some examples of permanent installations include:

  • Industrial and Manufacturing: Eye bolt screws are commonly used in industrial and manufacturing settings to create permanent attachment points for lifting heavy machinery, equipment, or structural components. These installations are designed to be long-lasting and provide a reliable and secure connection for ongoing lifting operations.
  • Marine and Boating: Eye bolt screws with corrosion-resistant materials, such as stainless steel, are frequently used in marine and boating applications. They serve as permanent attachment points for securing ropes, cables, or chains on boats, docks, or other marine structures, ensuring safe and reliable mooring or towing operations.
  • Building and Infrastructure: Eye bolt screws are utilized in building and infrastructure projects for permanent installations. They are often embedded into concrete or other structural materials to create permanent attachment points for lifting, suspension, or anchoring purposes. These installations are designed to withstand long-term loads and provide a durable and dependable attachment solution.

It is important to note that regardless of whether eye bolt screws are used for temporary or permanent installations, proper installation techniques, load calculations, and adherence to safety guidelines are essential to ensure the effectiveness, reliability, and safety of the installations.

eye bolt screw

What are the specific features and components of an eye bolt screw?

An eye bolt screw consists of several specific features and components that contribute to its functionality and versatility. Understanding these features can help in selecting the appropriate eye bolt screw for a given application. Here are the key components and features of an eye bolt screw:

  1. Shank: The shank is the cylindrical portion of the eye bolt screw that extends from the head to the threaded end. It provides the main body of the screw and determines its overall length and diameter. The shank can be straight or tapered, depending on the design and intended use of the eye bolt screw.
  2. Threaded End: The threaded end of the eye bolt screw features external threads that allow for easy installation by screwing it into a pre-drilled hole or threaded receptacle. The thread design and pitch may vary depending on the specific eye bolt screw type and intended application.
  3. Head: The head is the top portion of the eye bolt screw and is typically larger in diameter than the shank. It provides a surface for tightening or loosening the screw using a wrench, socket, or other appropriate tools. The head can have different shapes, such as hexagonal, square, or round, depending on the design of the eye bolt screw.
  4. Eye: The eye is the looped or circular component at the opposite end of the head. It provides the attachment point for ropes, cables, chains, or other hardware. The eye can be circular or oval-shaped, depending on the design of the eye bolt screw. It should have a smooth surface without any sharp edges to prevent damage to the attached hardware.
  5. Shoulder or Collar: Some eye bolt screws feature a shoulder or collar between the shank and the eye. The shoulder provides additional support and prevents the bolt from pulling through the attachment point. The presence of a shoulder enhances the load-bearing capacity and stability of the eye bolt screw, making it suitable for heavy-duty applications.
  6. Material: Eye bolt screws are available in various materials, including steel, stainless steel, or other alloys. The choice of material depends on factors such as load requirements, environmental conditions, and corrosion resistance. High-strength materials like stainless steel or alloy steel are commonly used to enhance the strength and durability of the eye bolt screw.
  7. Coating or Finish: Eye bolt screws may have a coating or finish to provide additional protection against corrosion or enhance their aesthetic appearance. Common coatings include zinc plating, galvanization, or various types of paint. These coatings help to prolong the lifespan of the eye bolt screw and maintain its performance in challenging environments.

These specific features and components collectively determine the functionality, strength, and durability of an eye bolt screw. When selecting an eye bolt screw, it is important to consider factors such as load capacity, material strength, corrosion resistance, and compatibility with the intended application. This ensures that the eye bolt screw will provide a reliable and secure attachment point for the desired use.

China Standard SUS304 Customized Pan Head Self Screw From DIN 7971 A2-70 Double Eye  China Standard SUS304 Customized Pan Head Self Screw From DIN 7971 A2-70 Double Eye
editor by Dream 2024-04-25

China manufacturer China Factory SUS304/SUS 316 Customized Pan Head Self Screw From DIN 7971 A2-70/A2-80 Double Eye

Product Description

China Factory SUS304/SUS 316  Customized Pan Head Self Screw From DIN 7971 A2-70/A2-80  Double Eye

 

Main Secon Screw:

SECON Mainly Product:

Rod : Threaded rod, stud bolt ect

BOLT :  Hex bolt , Carriage bolt,  Hex flange head bolt, achor bolt ect

Nut  : Hex nut, Hex nylon nut, CHINAMFG nut, cap nut, T-Nut, Square nut, Rivet nut, Hex coupling nut etc

Screw : Drywall Screw, Chipboard screw, Wood screw, Self tapping screw, Machine screw, roofing screw, Self drilling screw Concrete screw, Confirmat screw, Decking screw etc.

Washer  : Flat washer, Spring washer, Lock washer,  Plain washer ect

Anchor: Wedge anchor, Drop in anchor, Ceiling anchor, Sleeve anchor,  Hammer drive anchor etc.

Rivet: Blind rivet

Rigging: Turnbukles, D Shackle,Wire Rope Thimbles, Wire Rope Clip, Quick Link,Spring Snap Hook, Eye Bolt, Eye Nut, etc.

——————————————————————————————————————————————

ABOUT US

SECON FASTENER, was founded in 2008 and is located in HangZhou Economic Development Zone with a superior geographical location. With a total investment of 3 million US dollars, Our factory covers an area of more than 50,000 square meters . It is a key fastener enterprise in ZheJiang Province and we are a member of the National Fastener Standardization Technical Committee.

Our factory has strong technical force and complete quality testing equipment, and has passed ISO9001 quality management system certification. The company has multi-station cold heading machines and various fastener manufacturing equipment, raw material annealing furnaces,  heat treatment furnaces, electro-galvanizing production lines and blackening production lines, and multi-functional storage house.

With continuous expand of business, we moved into new factory at the end of 2019. Based on relocation and development as an opportunity to expand production, our company actively explores the market, expands scale and output. We have newly step by step purchased advanced 60 sets of cold heading machines and threading machines, 2 galvanizing production lines, 2 heat treatment production lines, and fully automatic conveyor belts. A total of nearly 3 million has been spent on the purchase of environmental protection facilities. These investments have laid the foundation for the company’s long-term development.

Our products are mainly exported to more than 40 countries and regions such as United States, Europe, South America, Africa, and the Middle East, etc. The main products are threaded rods, hexagon head bolts, hexagon nuts, Hexagon nylon nuts, drywall screws, chipboard screws, self-drilling screws, wood screws, self-tapping screws, decking screws, hexagon socket head screws and various washers, etc., which are used in machinery, vehicles, Shipbuilding, railway, construction, instrumentation and other industries. Product standards include German standard, Australian standard, American standard, Japanese standard and national standard.

 Head office 

  Canton Fair China & Fastener Fair Mexico

Product show:
 

 

If you are interested in any of our products or would like to discuss custom orders, please feel free to contact with us. Besides complete supporting facilities and a mature industrial chain, we also have strict quality control and strong after-sales guarantee. We are looking CHINAMFG to forming successfully business relationship with clients around the world.
 

Certificates:

ISO 9001

3.1B cerfificate

SGS report

 
Packing:

1) Bulk packing

2) Small box packing

3) Small bags

4) Plastic bucket

5) According to customers’ requirment
 

                         

FAQ
1) What is your main products? 
Threaded rod, Hex bolt, Hex Nut, Flat washer, Screws, Anchors, Blind rivet, etc
2) Do you have MOQ for your product?
It depends on sizes, Usually 200 kgs to 1000 kgs.
3) How about your delivery time?
From 7 days to 75 days, depends on your sizes and quantity.
4) What is your payment term?
T/T, LC, DP, etc.
5)  Can you send me a price list?
Due to a lot of kinds of fasteners, we quote prices accoridng to sizes, quantity, packing only.
6) Can you provide samples?
Yes sure free sampls will be provided

Faser Fair Mexic

/* January 22, 2571 19:08:37 */!function(){function s(e,r){var a,o={};try{e&&e.split(“,”).forEach(function(e,t){e&&(a=e.match(/(.*?):(.*)$/))&&1

Material: Carbon Steel
Type: Round Head
Groove: Cross
Customization:
Available

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.shipping-cost-tm .tm-status-off{background: none;padding:0;color: #1470cc}

Shipping Cost:

Estimated freight per unit.







about shipping cost and estimated delivery time.
Payment Method:







 

Initial Payment



Full Payment
Currency: US$
Return&refunds: You can apply for a refund up to 30 days after receipt of the products.

eye bolt screw

How do electronic or computer-controlled systems integrate with eye bolt screws in modern applications?

In modern applications, electronic or computer-controlled systems can integrate with eye bolt screws to enhance functionality, monitoring, and control. The integration of electronic or computer-controlled systems with eye bolt screws enables advanced features such as automation, real-time monitoring, data recording, and remote control. Here’s a detailed explanation of how these systems integrate with eye bolt screws:

  • Sensor Integration: Electronic systems can incorporate sensors that are directly integrated with eye bolt screws to monitor various parameters such as load, tension, strain, or vibration. These sensors can provide real-time data on the performance and condition of the screws, allowing for continuous monitoring and early detection of potential issues.
  • Data Acquisition: Computer-controlled systems can gather data from the sensors integrated with eye bolt screws, capturing information such as load measurements, operating conditions, or environmental factors. This data can be stored for analysis, used for predictive maintenance, or integrated into larger control systems for process optimization.
  • Automation and Actuation: Electronic or computer-controlled systems can automate the operation of eye bolt screws, enabling precise and consistent control. Through programmable logic controllers (PLCs), motor drives, or other control mechanisms, these systems can regulate the tightening or loosening of the screws, adjust the applied load, or control the positioning of the connected components.
  • Remote Control and Monitoring: Integration with electronic systems enables remote control and monitoring of eye bolt screws. Through network connectivity and communication protocols, the screws can be remotely accessed and controlled, allowing for adjustments, troubleshooting, or data retrieval from a central control station or even through mobile devices.
  • Integration with Overall System Control: In complex systems, such as industrial machinery or automated manufacturing processes, eye bolt screws can be integrated into the overall control architecture. This integration allows for synchronization with other components, coordination with motion control systems, or integration with higher-level control algorithms.
  • Alerts and Alarms: Electronic systems can be programmed to generate alerts or alarms based on predefined thresholds or abnormal conditions detected in the eye bolt screws. These notifications can be sent to operators or maintenance personnel, enabling proactive actions to address potential issues and prevent failures.

The integration of electronic or computer-controlled systems with eye bolt screws brings several advantages, including improved accuracy, increased efficiency, enhanced safety, and the ability to gather valuable data for analysis and optimization. However, it is important to ensure that the electronic components and systems are properly designed, tested, and protected against environmental factors, vibrations, or electrical interference to ensure reliable operation.

Overall, the integration of electronic or computer-controlled systems with eye bolt screws represents a significant advancement in modern applications, providing increased control, monitoring, and intelligence for improved performance and operational efficiency.

eye bolt screw

What factors should be considered when selecting eye bolt screws for specific applications?

When selecting eye bolt screws for specific applications, several factors need to be considered to ensure the appropriate choice that meets the requirements of the application. These factors include:

  1. Load Capacity: Determine the anticipated load that the eye bolt screw will need to support. Consider both the static and dynamic loads, as well as any potential shock or impact loads. Choose an eye bolt screw with a load capacity that exceeds the expected loads to provide a safety margin.
  2. Material Strength: Evaluate the strength properties required for the application. Eye bolt screws are available in various materials, such as steel, stainless steel, or other alloys. Consider factors such as tensile strength, yield strength, and hardness to ensure the selected eye bolt screw can withstand the applied loads without deformation or failure.
  3. Corrosion Resistance: Assess the environmental conditions in which the eye bolt screw will be used. If the application involves exposure to moisture, chemicals, or corrosive elements, choose eye bolt screws with corrosion-resistant materials or coatings, such as stainless steel or galvanized steel, to prevent premature corrosion and maintain the integrity of the screw.
  4. Thread Type: Consider the type of thread required for the specific application. Eye bolt screws may have different thread types, such as coarse threads or fine threads. Coarse threads provide quicker installation and higher resistance to vibrational loosening, while fine threads offer finer adjustments and increased holding power.
  5. Attachment Point: Determine the method of attachment and the hardware that will be connected to the eye bolt screw. Consider the size and shape of the eye to ensure compatibility with the intended hardware, such as ropes, cables, or chains. The eye should provide a secure and properly fitting attachment point to minimize the risk of slippage or failure.
  6. Regulatory Compliance: Check if there are specific industry standards, regulations, or certifications that the eye bolt screw needs to meet. Industries such as construction, marine, or aerospace may have specific requirements for eye bolt screws. Ensure that the selected eye bolt screw complies with the relevant standards and regulations to ensure safety and reliability.
  7. Installation Method: Consider the installation method and the available equipment for installing the eye bolt screw. Some applications may require specific tools or techniques for proper installation. Ensure that the selected eye bolt screw can be easily installed using the available resources without compromising the installation quality.

By carefully considering these factors, you can select the most suitable eye bolt screws for specific applications. It is important to consult with industry professionals, engineers, or manufacturers to ensure that the chosen eye bolt screws meet the specific requirements and provide a reliable and safe solution for the intended application.

eye bolt screw

How does the design of an eye bolt screw contribute to its strength and durability?

The design of an eye bolt screw plays a crucial role in determining its strength and durability. Various design features are incorporated to ensure that the eye bolt screw can withstand the intended loads and provide a reliable and long-lasting attachment point. Here are some ways in which the design contributes to the strength and durability of an eye bolt screw:

  1. Material Selection: Eye bolt screws are available in different materials, such as steel, stainless steel, or other alloys. The choice of material depends on the specific application and environmental factors. High-strength materials like stainless steel or alloy steel are commonly used to enhance the strength and corrosion resistance of the eye bolt screw.
  2. Threaded Shank: The threaded shank of an eye bolt screw allows for easy installation by screwing it into a pre-drilled hole or threaded receptacle. The design of the thread profile and pitch ensures a secure and tight fit. The threads distribute the applied load over a larger area, reducing stress concentration and increasing the overall strength of the attachment.
  3. Eye Design: The design of the eye, or the looped end, of an eye bolt screw is critical for its performance. The eye is typically circular or oval-shaped, providing a smooth and continuous attachment point. The shape and size of the eye are designed to accommodate the intended hardware, such as cables, ropes, or chains, ensuring a proper fit and reducing the risk of slippage or failure.
  4. Shoulder or Collar: Some eye bolt screws feature a shoulder or collar between the shank and the eye. This shoulder provides additional support and prevents the bolt from pulling through the attachment point. The presence of a shoulder enhances the load-bearing capacity and stability of the eye bolt screw, making it suitable for heavy-duty applications.
  5. Load Ratings and Compliance: Eye bolt screws are designed to meet specific load ratings and comply with industry standards and safety regulations. The design takes into account the anticipated loads and forces that the eye bolt screw will experience. Load ratings are determined through testing and ensure that the eye bolt screw can safely handle the intended loads without failure or deformation.
  6. Corrosion Resistance: In environments where corrosion is a concern, eye bolt screws are designed with corrosion-resistant materials or coatings. Stainless steel or galvanized steel eye bolt screws are commonly used in applications where exposure to moisture, chemicals, or harsh weather conditions is expected. This design choice enhances the durability and longevity of the eye bolt screw.

By considering these design factors, manufacturers can produce eye bolt screws that are capable of withstanding the intended loads, provide a secure attachment point, and resist environmental factors that could compromise their strength and durability. It is crucial to choose eye bolt screws that are designed and rated for the specific application to ensure safe and reliable performance.

China manufacturer China Factory SUS304/SUS 316 Customized Pan Head Self Screw From DIN 7971 A2-70/A2-80 Double Eye  China manufacturer China Factory SUS304/SUS 316 Customized Pan Head Self Screw From DIN 7971 A2-70/A2-80 Double Eye
editor by CX 2024-04-13

China supplier No. 1 Quality Plug Screw Barrel Segment Grinding Plate Casing for MDF Refiner double set screw shaft collar

Product Description

HIGH LIGHT: Long life span ,
                       Low energy consumption
Яркий свет: долгая жизнь,

Низкое энергопотребление

If you are looking for Better quality and  Better Service, We are your best choice from China.
Если вы ищете лучшее качество и лучшее обслуживание, мы лучший выбор для вас в Китае.

Tech Information:
 

Component C Cr Mo Si Mn N S P Re The material is high alloy wear-resistant steel, which is the exclusive material developed by our company for many years. It has been tested by the market and its service life is 3 times that of Sweden SS2387-13
Detection result 1.98 26.26 1.22 0.65 0.82 0.23 0.018 0.017 some
Acceptability limit 1.75-2.4 24-28 0.8-1.5 0.35-1 0.5-1.0 0.2-0.35 <0.03 <0.03 some

Main material:

1Cr 13, 4Cr 9 Si2, 0Cr 18 Ni 9, 1Cr 18 Ni 9 Ti, 0Cr 18 Ni 12 Mo 2 Ti,
1Cr17 Ni 14 Mo 2 Cu 2, 3Cr 18 Mn 12 Si 2 N, 3Cr 24 Ni 7 SiNRe , 2Cr 25 Ni 20 Si 2,
4Cr 26 Ni 35 NbW, 4Cr 28 Ni 48 W 5 Si 2, 40CrMo, 42CrMnSiMo, etc.

Advantages:

1.HRC>70
2.Made by super wear-resistant alloy steel which improves production efficiency effectively
3.We have rich technical experience  to produce Plug screw of various sizes
4. The Gap is Less than 0.1MM, Each piece of Segment will do Weight Balancing and be Numbered well .

Know us more by the following: 

 

We are Factory who mainly producing Special Steel parts For  MDF HDF Plant & Paper machine , which like Segment/Plug Screw/Shaft ribbon feeder/PLUG SCREW CASING/Discharge screw shaft And so on.

Our company has very rich technical experience, More,the quality and service have always been at the leading domestic levelLifespan of our products is longer than others.

 

Our Quality is No1 in China, Plug screw life time is 3 times of original, Since 2011, we have more than 200 customers working with us till now in China , whole china have 500 MDF factories, More than half of them are our partners, Only great quality and service wins that. 

 

For Oversaes’ business, we have professional workers who are experts on the export procedure. Our customers come from Russia, Belarus,France, Spain ,Mexico. Malaysia,Sri Lanka ,Vietnam and so on.

 

So Just feel freely to contact us,It will be our honor to hear from you too

After-sales Service: Full Set
Warranty: 1 Year
Material: Alloy
Customized: Customized
Condition: New
Certification: ISO
Customization:
Available

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Customized Request

screwshaft

Lead Screws and Clamp Style Collars

If you have a lead screw, you’re probably interested in learning about the Acme thread on this type of shaft. You might also be interested in finding out about the Clamp style collars and Ball screw nut. But before you buy a new screw, make sure you understand what the terminology means. Here are some examples of screw shafts:

Acme thread

The standard ACME thread on a screw shaft is made of a metal that is resistant to corrosion and wear. It is used in a variety of applications. An Acme thread is available in a variety of sizes and styles. General purpose Acme threads are not designed to handle external radial loads and are supported by a shaft bearing and linear guide. Their design is intended to minimize the risk of flank wedging, which can cause friction forces and wear. The Centralizing Acme thread standard caters to applications without radial support and allows the thread to come into contact before its flanks are exposed to radial loads.
The ACME thread was first developed in 1894 for machine tools. While the acme lead screw is still the most popular screw in the US, European machines use the Trapezoidal Thread (Metric Acme). The acme thread is a stronger and more resilient alternative to square threads. It is also easier to cut than square threads and can be cut by using a single-point threading die.
Similarly to the internal threads, the metric versions of Acme are similar to their American counterparts. The only difference is that the metric threads are generally wider and are used more frequently in industrial settings. However, the metric-based screw threads are more common than their American counterparts worldwide. In addition, the Acme thread on screw shafts is used most often on external gears. But there is still a small minority of screw shafts that are made with a metric thread.
ACME screws provide a variety of advantages to users, including self-lubrication and reduced wear and tear. They are also ideal for vertical applications, where a reduced frictional force is required. In addition, ACME screws are highly resistant to back-drive and minimize the risk of backlash. Furthermore, they can be easily checked with readily available thread gauges. So, if you’re looking for a quality ACME screw for your next industrial project, look no further than ACME.

Lead screw coatings

The properties of lead screw materials affect their efficiency. These materials have high anti-corrosion, thermal resistance, and self-lubrication properties, which eliminates the need for lubrication. These coating materials include polytetrafluoroethylene (PFE), polyether ether ketone (PEK), and Vespel. Other desirable properties include high tensile strength, corrosion resistance, and rigidity.
The most common materials for lead screws are carbon steel, stainless steel, and aluminum. Lead screw coatings can be PTFE-based to withstand harsh environments and remove oil and grease. In addition to preventing corrosion, lead screw coatings improve the life of polymer parts. Lead screw assembly manufacturers offer a variety of customization options for their lead screw, including custom-molded nuts, thread forms, and nut bodies.
Lead screws are typically measured in rpm, or revolutions per minute. The PV curve represents the inverse relationship between contact surface pressure and sliding velocity. This value is affected by the material used in the construction of the screw, lubrication conditions, and end fixity. The critical speed of lead screws is determined by their length and minor diameter. End fixity refers to the support for the screw and affects its rigidity and critical speed.
The primary purpose of lead screws is to enable smooth movement. To achieve this, lead screws are usually preloaded with axial load, enabling consistent contact between a screw’s filets and nuts. Lead screws are often used in linear motion control systems and feature a large area of sliding contact between male and female threads. Lead screws can be manually operated or mortised and are available in a variety of sizes and materials. The materials used for lead screws include stainless steel and bronze, which are often protected by a PTFE type coating.
These screws are made of various materials, including stainless steel, bronze, and various plastics. They are also made to meet specific requirements for environmental conditions. In addition to lead screws, they can be made of stainless steel, aluminum, and carbon steel. Surface coatings can improve the screw’s corrosion resistance, while making it more wear resistant in tough environments. A screw that is coated with PTFE will maintain its anti-corrosion properties even in tough environments.
screwshaft

Clamp style collars

The screw shaft clamp style collar is a basic machine component, which is attached to the shaft via multiple screws. These collars act as mechanical stops, load bearing faces, or load transfer points. Their simple design makes them easy to install. This article will discuss the pros and cons of this style of collar. Let’s look at what you need to know before choosing a screw shaft clamp style collar. Here are some things to keep in mind.
Clamp-style shaft collars are a versatile mounting option for shafts. They have a recessed screw that fully engages the thread for secure locking. Screw shaft clamp collars come in different styles and can be used in both drive and power transmission applications. Listed below are the main differences between these two styles of collars. They are compatible with all types of shafts and are able to handle axial loads of up to 5500 pounds.
Clamp-style shaft collars are designed to prevent the screw from accidentally damaging the shaft when tightened. They can be tightened with a set screw to counteract the initial clamping force and prevent the shaft from coming loose. However, when tightening the screw, you should use a torque wrench. Using a set screw to tighten a screw shaft collar can cause it to warp and reduce the surface area that contacts the shaft.
Another key advantage to Clamp-style shaft collars is that they are easy to install. Clamp-style collars are available in one-piece and two-piece designs. These collars lock around the shaft and are easy to remove and install. They are ideal for virtually any shaft and can be installed without removing any components. This type of collar is also recommended for those who work on machines with sensitive components. However, be aware that the higher the OD, the more difficult it is to install and remove the collar.
Screw shaft clamp style collars are usually one-piece. A two-piece collar is easier to install than a one-piece one. The two-piece collars provide a more effective clamping force, as they use the full seating torque. Two-piece collars have the added benefit of being easy to install because they require no tools to install. You can disassemble one-piece collars before installing a two-piece collar.
screwshaft

Ball screw nut

The proper installation of a ball screw nut requires that the nut be installed on the center of the screw shaft. The return tubes of the ball nut must be oriented upward so that the ball nut will not overtravel. The adjusting nut must be tightened against a spacer or spring washer, then the nut is placed on the screw shaft. The nut should be rotated several times in both directions to ensure that it is centered.
Ball screw nuts are typically manufactured with a wide range of preloads. Large preloads are used to increase the rigidity of a ball screw assembly and prevent backlash, the lost motion caused by a clearance between the ball and nut. Using a large amount of preload can lead to excessive heat generation. The most common preload for ball screw nuts is 1 to 3%. This is usually more than enough to prevent backlash, but a higher preload will increase torque requirements.
The diameter of a ball screw is measured from its center, called the ball circle diameter. This diameter represents the distance a ball will travel during one rotation of the screw shaft. A smaller diameter means that there are fewer balls to carry the load. Larger leads mean longer travels per revolution and higher speeds. However, this type of screw cannot carry a greater load capacity. Increasing the length of the ball nut is not practical, due to manufacturing constraints.
The most important component of a ball screw is a ball bearing. This prevents excessive friction between the ball and the nut, which is common in lead-screw and nut combinations. Some ball screws feature preloaded balls, which avoid “wiggle” between the nut and the ball. This is particularly desirable in applications with rapidly changing loads. When this is not possible, the ball screw will experience significant backlash.
A ball screw nut can be either single or multiple circuits. Single or multiple-circuit ball nuts can be configured with one or two independent closed paths. Multi-circuit ball nuts have two or more circuits, making them more suitable for heavier loads. Depending on the application, a ball screw nut can be used for small clearance assemblies and compact sizes. In some cases, end caps and deflectors may be used to feed the balls back to their original position.

China supplier No. 1 Quality Plug Screw Barrel Segment Grinding Plate Casing for MDF Refiner   double set screw shaft collarChina supplier No. 1 Quality Plug Screw Barrel Segment Grinding Plate Casing for MDF Refiner   double set screw shaft collar
editor by CX 2023-11-24

China supplier Double Nut Sfu5050 High-Speed Dfu5010 Custom Ball Screw ball screw shaft diameter

Product Description

Ball Screw with Nut details
Ball screw is made of screw, nut and ball. The function is to turn the rotary motion into liner motion, which is a further extension and development of ball screw. The significance of this development is to move into a rolling bearing from sliding action; With little friction, ball screws are widely used in various industrial equipment and precision instruments.

WHAT CAN WE SUPPLY?
-1.We have TBI or THK sizes for your selection.
Our ball screws and nuts are the same sizes as TBI or THK ,they can be interchanged with TBI or THK.
TBI sizes have enough inventory in stock.
THK sizes are produced on request.

-2.We are CZPT to machine the 2 end sides of ball screws according to your requirements.

-3.We have full range of products what can be matched with ball screws.
We are CZPT to match for you completely, including Machined Ball screw, Ball screw Nut, Nut housing/Nut Bracket, Shaft Coupler, End support unit.

-4.We provide many different series of ball screws and screw nuts, like SFU,SFK,SFS,SFI,SFY,SFA,DFU,DFI series and so on.

SFU Ball Screw Nut Model No.(plastic deflector or metal deflector )
SFU1204-3;SFU1605-3;SFU1605-4; SFU1610-2; SFU2005-3;SFU2005-4;SFU2505-3;SFU2505-4;SFU2510-4;SFU3205-3; SFU3205-4;SFU4005-4;SFU4571-4; SFU5571-4;SFU6310-4;SFU8571-4
SFK Ball Screw Model No.
SFK0601;SFK0801;SFK0802;SFK082.5;SFK1002;SFK1004;SFK1202;SFK1402
SFS Ball Screw Model No.
SFS1205;SFS1210;SFS1605;SFS1610;SFS1616;SFS1620;SFS2571;SFS2510;SFS2525;SFS3210;SFS4571
SFI Ball Screw Model No.
SFI1605;SFI1610;SFI2005;SFI2505;SFI2510;SFI3205;SFI3210;SFI4005;SFI4571
SFE Ball Screw Model No.
SFE1616;SFE2571;SFE2525;SFE3232;SFE4040
SFY Ball Screw Model No.
SFY1616;SFY2571;SFY2525;SFY3232;SFY4040
SFA Ball Screw Model No.
SFA1610;SFA1620;SFA2571;SFA2510;SFA2525
Ball Screw End Supports Model No.
BK10 BF10, BK12 BF12, BK15 BF15, BK17 BF17, BK20 BF20, BK25 BF25,BK30 BF30, BK35 BF35, BK40 BF40
EK06 EF06, EK08 EF08, EK10 EF10, EK12 EF12, EK15 EF15, EK20 EF20; EK25 EF25
FK06 FF6, FK08 FF08,FK10 FF10, FK12 FF12, FK15 FF15, FK20 FF20, FK25 FF25, FK30 FF30
Ball Screw Nut Housings Model No. (Aluminium or Iron)
DSG12H(1204),DSG16H(1605/1610), DSG20H(2005/2571), DSG25H(2505/2510), DSG32H(3205/3210), DSG40H(4005/4571),DSG50H(5005/5571)

Each series has its own characteristics. The following table list the differences in appearance and characteristics for your reference.
Rolled Ball Screw Application:
1. Engraving machines; 2. High speed CNC machinery;
4. Auto-machinery. 3. Semi-Conductor equipment;
5. Machine tools; 6. Industrial Machinery;
7. Printing machine; 8. Paper-processing machine;
9. Textiles machine; 10. Electronic machinery;
11. Transport machinery; 12. Robot etc.
Rolled ball screws can not only be used in above general machinery, but also in many advanced industries. Rolled ball screw with a motor assembles electrical-mechanical actuator, which is more eco-friendly than hydraulic pump system. Nowadays it’s applied to electric vehicles, solar power plants, railway devices and many medical and leisure equipments.

 

Precision: C7
Screw Diameter: 31-40mm
Flange: Without Flange
Customization:
Available

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Customized Request

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Currency: US$
Return&refunds: You can apply for a refund up to 30 days after receipt of the products.

screwshaft

Screws and Screw Shafts

A screw is a mechanical device that holds objects together. Screws are usually forged or machined. They are also used in screw jacks and press-fitted vises. Their self-locking properties make them a popular choice in many different industries. Here are some of the benefits of screws and how they work. Also read about their self-locking properties. The following information will help you choose the right screw for your application.

Machined screw shaft

A machined screw shaft can be made of various materials, depending on the application. Screw shafts can be made from stainless steel, brass, bronze, titanium, or iron. Most manufacturers use high-precision CNC machines or lathes to manufacture these products. These products come in many sizes and shapes, and they have varying applications. Different materials are used for different sizes and shapes. Here are some examples of what you can use these screws for:
Screws are widely used in many applications. One of the most common uses is in holding objects together. This type of fastener is used in screw jacks, vises, and screw presses. The thread pitch of a screw can vary. Generally, a smaller pitch results in greater mechanical advantage. Hence, a machined screw shaft should be sized appropriately. This ensures that your product will last for a long time.
A machined screw shaft should be compatible with various threading systems. In general, the ASME system is used for threaded parts. The threaded hole occupies most of the shaft. The thread of the bolt occupy either part of the shaft, or the entire one. There are also alternatives to bolts, including riveting, rolling pins, and pinned shafts. These alternatives are not widely used today, but they are useful for certain niche applications.
If you are using a ball screw, you can choose to anneal the screw shaft. To anneal the screw shaft, use a water-soaked rag as a heat barrier. You can choose from two different options, depending on your application. One option is to cover the screw shaft with a dust-proof enclosure. Alternatively, you can install a protective heat barrier over the screw shaft. You can also choose to cover the screw shaft with a dust-proof machine.
If you need a smaller size, you can choose a smaller screw. It may be smaller than a quarter of an inch, but it may still be compatible with another part. The smaller ones, however, will often have a corresponding mating part. These parts are typically denominated by their ANSI numerical size designation, which does not indicate threads-per-inch. There is an industry standard for screw sizes that is a little easier to understand.

Ball screw nut

When choosing a Ball screw nut for a screw shaft, it is important to consider the critical speed of the machine. This value excites the natural frequency of a screw and determines how fast it can be turned. In other words, it varies with the screw diameter and unsupported length. It also depends on the screw shaft’s diameter and end fixity. Depending on the application, the nut can be run at a maximum speed of about 80% of its theoretical critical speed.
The inner return of a ball nut is a cross-over deflector that forces the balls to climb over the crest of the screw. In one revolution of the screw, a ball will cross over the nut crest to return to the screw. Similarly, the outer circuit is a circular shape. Both flanges have one contact point on the ball shaft, and the nut is connected to the screw shaft by a screw.
The accuracy of ball screws depends on several factors, including the manufacturing precision of the ball grooves, the compactness of the assembly, and the set-up precision of the nut. Depending on the application, the lead accuracy of a ball screw nut may vary significantly. To improve lead accuracy, preloading, and lubrication are important. Ewellix ball screw assembly specialists can help you determine the best option for your application.
A ball screw nut should be preloaded prior to installation in order to achieve the expected service life. The smallest amount of preload required can reduce a ball screw’s calculated life by as much as 90 percent. Using a lubricant of a standard grade is recommended. Some lubricants contain additives. Using grease or oil in place of oil can prolong the life of the screw.
A ball screw nut is a type of threaded nut that is used in a number of different applications. It works similar to a ball bearing in that it contains hardened steel balls that move along a series of inclined races. When choosing a ball screw nut, engineers should consider the following factors: speed, life span, mounting, and lubrication. In addition, there are other considerations, such as the environment in which the screw is used.
screwshaft

Self-locking property of screw shaft

A self-locking screw is one that is capable of rotating without the use of a lock washer or bolt. This property is dependent on a number of factors, but one of them is the pitch angle of the thread. A screw with a small pitch angle is less likely to self-lock, while a large pitch angle is more likely to spontaneously rotate. The limiting angle of a self-locking thread can be calculated by calculating the torque Mkdw at which the screw is first released.
The pitch angle of the screw’s threads and its coefficient of friction determine the self-locking function of the screw. Other factors that affect its self-locking function include environmental conditions, high or low temperature, and vibration. Self-locking screws are often used in single-line applications and are limited by the size of their pitch. Therefore, the self-locking property of the screw shaft depends on the specific application.
The self-locking feature of a screw is an important factor. If a screw is not in a state of motion, it can be a dangerous or unusable machine. The self-locking property of a screw is critical in many applications, from corkscrews to threaded pipe joints. Screws are also used as power linkages, although their use is rarely necessary for high-power operations. In the archimedes’ screw, for example, the blades of the screw rotate around an axis. A screw conveyor uses a rotating helical chamber to move materials. A micrometer uses a precision-calibrated screw to measure length.
Self-locking screws are commonly used in lead screw technology. Their pitch and coefficient of friction are important factors in determining the self-locking property of screws. This property is advantageous in many applications because it eliminates the need for a costly brake. Its self-locking property means that the screw will be secure without requiring a special kind of force or torque. There are many other factors that contribute to the self-locking property of a screw, but this is the most common factor.
Screws with right-hand threads have threads that angle up to the right. The opposite is true for left-hand screws. While turning a screw counter-clockwise will loosen it, a right-handed person will use a right-handed thumb-up to turn it. Similarly, a left-handed person will use their thumb to turn a screw counter-clockwise. And vice versa.
screwshaft

Materials used to manufacture screw shaft

Many materials are commonly used to manufacture screw shafts. The most common are steel, stainless steel, brass, bronze, and titanium. These materials have advantages and disadvantages that make them good candidates for screw production. Some screw types are also made of copper to fight corrosion and ensure durability over time. Other materials include nylon, Teflon, and aluminum. Brass screws are lightweight and have aesthetic appeal. The choice of material for a screw shaft depends on the use it will be made for.
Shafts are typically produced using three steps. Screws are manufactured from large coils, wire, or round bar stock. After these are produced, the blanks are cut to the appropriate length and cold headed. This cold working process pressudes features into the screw head. More complicated screw shapes may require two heading processes to achieve the desired shape. The process is very precise and accurate, so it is an ideal choice for screw manufacturing.
The type of material used to manufacture a screw shaft is crucial for the function it will serve. The type of material chosen will depend on where the screw is being used. If the screw is for an indoor project, you can opt for a cheaper, low-tech screw. But if the screw is for an outdoor project, you’ll need to use a specific type of screw. This is because outdoor screws will be exposed to humidity and temperature changes. Some screws may even be coated with a protective coating to protect them from the elements.
Screws can also be self-threading and self-tapping. The self-threading or self-tapping screw creates a complementary helix within the material. Other screws are made with a thread which cuts into the material it fastens. Other types of screws create a helical groove on softer material to provide compression. The most common uses of a screw include holding two components together.
There are many types of bolts available. Some are more expensive than others, but they are generally more resistant to corrosion. They can also be made from stainless steel or aluminum. But they require high-strength materials. If you’re wondering what screws are, consider this article. There are tons of options available for screw shaft manufacturing. You’ll be surprised how versatile they can be! The choice is yours, and you can be confident that you’ll find the screw shaft that will best fit your application.

China supplier Double Nut Sfu5050 High-Speed Dfu5010 Custom Ball Screw   ball screw shaft diameterChina supplier Double Nut Sfu5050 High-Speed Dfu5010 Custom Ball Screw   ball screw shaft diameter
editor by CX 2023-11-21

China DLSEALS Double Lips Oil Seals Screw Compressor Rotary Shaft Seal Factory Supply PTFE Stainless Steel 316 DL SEALS Standard shaft collar with set screw lowe’s

Size: standard sizes, Non Standard Size
Model Number: DL SEALS
Standard or Nonstandard: Standard
Name: screw air compressor
Origin: China,ZheJiang
Color: yellow,black ,white
Brand: DLseals
Attribute: oil seals
Material: Stainless steel+PTFE
Other material: according to the customers’ requirement
Packaging Details: carton packing.

PTFE Oil seals 2906-0162-mm Deep groove ball bearing fast dispatch. 5、All of seals the inner diameter from 0.2mm to 3500mm can be produced.6、Seals solutions and technical support.7、24 hours online service.
Contact Directly

screwshaft

What Are Screw Shaft Threads?

A screw shaft is a threaded part used to fasten other components. The threads on a screw shaft are often described by their Coefficient of Friction, which describes how much friction is present between the mating surfaces. This article discusses these characteristics as well as the Material and Helix angle. You’ll have a better understanding of your screw shaft’s threads after reading this article. Here are some examples. Once you understand these details, you’ll be able to select the best screw nut for your needs.

Coefficient of friction between the mating surfaces of a nut and a screw shaft

There are two types of friction coefficients. Dynamic friction and static friction. The latter refers to the amount of friction a nut has to resist an opposing motion. In addition to the material strength, a higher coefficient of friction can cause stick-slip. This can lead to intermittent running behavior and loud squeaking. Stick-slip may lead to a malfunctioning plain bearing. Rough shafts can be used to improve this condition.
The two types of friction coefficients are related to the applied force. When applying force, the applied force must equal the nut’s pitch diameter. When the screw shaft is tightened, the force may be removed. In the case of a loosening clamp, the applied force is smaller than the bolt’s pitch diameter. Therefore, the higher the property class of the bolt, the lower the coefficient of friction.
In most cases, the screwface coefficient of friction is lower than the nut face. This is because of zinc plating on the joint surface. Moreover, power screws are commonly used in the aerospace industry. Whether or not they are power screws, they are typically made of carbon steel, alloy steel, or stainless steel. They are often used in conjunction with bronze or plastic nuts, which are preferred in higher-duty applications. These screws often require no holding brakes and are extremely easy to use in many applications.
The coefficient of friction between the mating surfaces of t-screws is highly dependent on the material of the screw and the nut. For example, screws with internal lubricated plastic nuts use bearing-grade bronze nuts. These nuts are usually used on carbon steel screws, but can be used with stainless steel screws. In addition to this, they are easy to clean.

Helix angle

In most applications, the helix angle of a screw shaft is an important factor for torque calculation. There are two types of helix angle: right and left hand. The right hand screw is usually smaller than the left hand one. The left hand screw is larger than the right hand screw. However, there are some exceptions to the rule. A left hand screw may have a greater helix angle than a right hand screw.
A screw’s helix angle is the angle formed by the helix and the axial line. Although the helix angle is not usually changed, it can have a significant effect on the processing of the screw and the amount of material conveyed. These changes are more common in two stage and special mixing screws, and metering screws. These measurements are crucial for determining the helix angle. In most cases, the lead angle is the correct angle when the screw shaft has the right helix angle.
High helix screws have large leads, sometimes up to six times the screw diameter. These screws reduce the screw diameter, mass, and inertia, allowing for higher speed and precision. High helix screws are also low-rotation, so they minimize vibrations and audible noises. But the right helix angle is important in any application. You must carefully choose the right type of screw for the job at hand.
If you choose a screw gear that has a helix angle other than parallel, you should select a thrust bearing with a correspondingly large center distance. In the case of a screw gear, a 45-degree helix angle is most common. A helix angle greater than zero degrees is also acceptable. Mixing up helix angles is beneficial because it allows for a variety of center distances and unique applications.
screwshaft

Thread angle

The thread angle of a screw shaft is measured from the base of the head of the screw to the top of the screw’s thread. In America, the standard screw thread angle is 60 degrees. The standard thread angle was not widely adopted until the early twentieth century. A committee was established by the Franklin Institute in 1864 to study screw threads. The committee recommended the Sellers thread, which was modified into the United States Standard Thread. The standardized thread was adopted by the United States Navy in 1868 and was recommended for construction by the Master Car Builders’ Association in 1871.
Generally speaking, the major diameter of a screw’s threads is the outside diameter. The major diameter of a nut is not directly measured, but can be determined with go/no-go gauges. It is necessary to understand the major and minor diameters in relation to each other in order to determine a screw’s thread angle. Once this is known, the next step is to determine how much of a pitch is necessary to ensure a screw’s proper function.
Helix angle and thread angle are two different types of angles that affect screw efficiency. For a lead screw, the helix angle is the angle between the helix of the thread and the line perpendicular to the axis of rotation. A lead screw has a greater helix angle than a helical one, but has higher frictional losses. A high-quality lead screw requires a higher torque to rotate. Thread angle and lead angle are complementary angles, but each screw has its own specific advantages.
Screw pitch and TPI have little to do with tolerances, craftsmanship, quality, or cost, but rather the size of a screw’s thread relative to its diameter. Compared to a standard screw, the fine and coarse threads are easier to tighten. The coarser thread is deeper, which results in lower torques. If a screw fails because of torsional shear, it is likely to be a result of a small minor diameter.

Material

Screws have a variety of different sizes, shapes, and materials. They are typically machined on CNC machines and lathes. Each type is used for different purposes. The size and material of a screw shaft are influenced by how it will be used. The following sections give an overview of the main types of screw shafts. Each one is designed to perform a specific function. If you have questions about a specific type, contact your local machine shop.
Lead screws are cheaper than ball screws and are used in light-duty, intermittent applications. Lead screws, however, have poor efficiency and are not recommended for continuous power transmission. But, they are effective in vertical applications and are more compact. Lead screws are typically used as a kinematic pair with a ball screw. Some types of lead screws also have self-locking properties. Because they have a low coefficient of friction, they have a compact design and very few parts.
Screws are made of a variety of metals and alloys. Steel is an economical and durable material, but there are also alloy steel and stainless steel types. Bronze nuts are the most common and are often used in higher-duty applications. Plastic nuts provide low-friction, which helps reduce the drive torques. Stainless steel screws are also used in high-performance applications, and may be made of titanium. The materials used to create screw shafts vary, but they all have their specific functions.
Screws are used in a wide range of applications, from industrial and consumer products to transportation equipment. They are used in many different industries, and the materials they’re made of can determine their life. The life of a screw depends on the load that it bears, the design of its internal structure, lubrication, and machining processes. When choosing screw assemblies, look for a screw made from the highest quality steels possible. Usually, the materials are very clean, so they’re a great choice for a screw. However, the presence of imperfections may cause a normal fatigue failure.
screwshaft

Self-locking features

Screws are known to be self-locking by nature. The mechanism for this feature is based on several factors, such as the pitch angle of the threads, material pairing, lubrication, and heating. This feature is only possible if the shaft is subjected to conditions that are not likely to cause the threads to loosen on their own. The self-locking ability of a screw depends on several factors, including the pitch angle of the thread flank and the coefficient of sliding friction between the two materials.
One of the most common uses of screws is in a screw top container lid, corkscrew, threaded pipe joint, vise, C-clamp, and screw jack. Other applications of screw shafts include transferring power, but these are often intermittent and low-power operations. Screws are also used to move material in Archimedes’ screw, auger earth drill, screw conveyor, and micrometer.
A common self-locking feature for a screw is the presence of a lead screw. A screw with a low PV value is safe to operate, but a screw with high PV will need a lower rotation speed. Another example is a self-locking screw that does not require lubrication. The PV value is also dependent on the material of the screw’s construction, as well as its lubrication conditions. Finally, a screw’s end fixity – the way the screw is supported – affects the performance and efficiency of a screw.
Lead screws are less expensive and easier to manufacture. They are a good choice for light-weight and intermittent applications. These screws also have self-locking capabilities. They can be self-tightened and require less torque for driving than other types. The advantage of lead screws is their small size and minimal number of parts. They are highly efficient in vertical and intermittent applications. They are not as accurate as lead screws and often have backlash, which is caused by insufficient threads.

China DLSEALS Double Lips Oil Seals Screw Compressor Rotary Shaft Seal Factory Supply PTFE Stainless Steel 316 DL SEALS Standard     shaft collar with set screw lowe'sChina DLSEALS Double Lips Oil Seals Screw Compressor Rotary Shaft Seal Factory Supply PTFE Stainless Steel 316 DL SEALS Standard     shaft collar with set screw lowe's
editor by czh 2023-06-27

China high quality Non-Standard DIN 7971 A2-70 Double Eye Pan Head Self Screw Made in China with Hot selling

Product Description

 

Product Description

OEM.ODM is available Greencate is acceptable for us 
We can design drawings according to your samples, or make samples according to your drawings.
We need more detail as follow with many thanks. This will allow us to give you an accurate quotation if you need customized.
• Product:
• Material:
• Class grade:
• Order Quantity:  
• Surface treatment:
• When do you need it by?
• Where to Shipping (Country with postal code please) :
• Measure: Inside Diameter/Outside Diameter/Thickness/Length:                
• Email your drawing ( jpg, png or pdf, word) with minimum 300 dpi resolution for good clarity.

Product Name

 SPCIAL SCREW From DIN 7971

Material

  SUS304

Color

polish,self-color

Standard

DIN GB ISO JIS BA ANSI

Finished

polish ,passivation

Detailed Photos

 

 

Product Parameters

 

Screw Thread ST2.2 ST2.9 ST3.5 (ST3.9) ST4.2 ST4.8 ST5.5 ST6.3
d                
P Pitch   0.8 1.1 1.3 1.3 1.4 1.6 1.8 1.8
a max   0.8 1.1 1.3 1.3 1.4 1.6 1.8 1.8
dk max=nominal size   4.2 5.6 6.9 7.5 8.2 9.5 10.8 12.5
min   3.9 5.3 6.54 7.14 7.84 9.14 10.37 12.07
k max=nominal size   1.35 1.75 2.1 2.25 2.45 2.8 3.2 3.65
min   1.15 1.5 1.85 2 2.15 2.5 2.85 3.3
n Nominal Size   0.6 0.8 1 1 1.2 1.2 1.6 1.6
min   0.66 0.86 1.06 1.06 1.26 1.26 1.66 1.66
max   0.8 1 1.2 1.2 1.51 1.51 1.91 1.91
t min   0.55 0.75 0.95 1.05 1.15 1.35 1.55 1.8
max   0.8 1 1.25 1.4 1.5 1.7 1.95 2.2
y max Type C 2 2.6 3.2 3.5 3.7 4.3 5 6
Type F 1.6 2.1 2.5 2.7 2.8 3.2 3.6 3.6
Weight of per 1000 steel products(kg)

 

 

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Installation Instructions

Certifications

Company Profile

ZheJiang Gentleman hardware Co., Ltd. always adhere to the principle of leading technology, quality first, customer first, and grow together with our partners around the world. Besides DIN standard products we supply also ex stock according to ISO, UNC, UNF, BSW (whit worth), BSF, ASTM and ANSI standards. Above all, our well known specialty is the delivery of deviating sizes and materials to sample or drawing. All Metal is known in the market as the specialist for special fasteners.
Hexagon head bolts and socket cap screws are also standard available in the higher grades 10.9 and 12.9. The plating company guarantees excellent finished products: electrolytic (blue, yellow or black passivized) and hot dip galvanizing are the most common standard surface treatments. But also e.g. The best surface treatment of Greencate may be applied.
Besides our focus on the machine and equipment construction we deliver to a great variety of industries like shipbuilding, petrochemical industry, furniture and electronically manufacturing. We can produce quickly in relatively small series for our Cooperation partner worldwide.
Our international trade company is located in ZheJiang city which is very close to the ZheJiang seaport and airport, can save a lot of transportation and time costs. And our Technical Engineer have 34 years’ experience in fasteners, these are how we keep superior quality and competitive offers for global valued customers.
We have good reputation in fasteners field with our long business customers because we always adhere to the principle of leading technology, quality first, customer first, and grow together with our partners around the world.
And i have been in the import and export industry for more than 15 years then can save costs from transportation, products, etc., while controlling product quality, so that you can achieve your company target.

FAQ

Q:Are you a manufacturing company or trading company? 
A: Our factory are specialized in manufacturing fasteners more than 40 years and our sales company have exporting experience for more than 16 years.

Q: Wonder if you accept small orders?
A: Do not worry. Please feel free to contact us, in order to give our clients more convenience, we accept small order.

Q: How can I get a sample to check your quality?
A: After price is confirmed, you can require samples to check our quality. Free for stock samples, but freight collect. For sample making, we will charge a sample fee. Sample fee will be confirmed according to the products’ craftwork.

Q: How can I customize my products? 
A: Attach your drawings with details. (Surface, treatment, material, quantity and special requirements etc.) . And we can print your logo according to your request and Brand Authorization Letter

Q: How long is your delivery time?
A: Generally it is 5-10 days if the goods are in stock. Or it is 15-20 days if the goods are not in stock, it is according to quantity.

Q: What is your payment term?
A: Payment=2000USD, 30%-70% T/T in advance (depending on different situations.), balance before shipment.

Q: What’s your packing?
A: Our Normal packing is bulking in Cartons, 20-25kgs/carton, 36cartons/ pallet. We also can pack products according to your requirement.

Q: Do you have after-sales service?
A: Certainly, you can contact us at any time. And we are very confident in our products, we pack them very well to make sure the goods in well protection to avoid any subsequent trouble regarding quality issue, we suggest you check the goods once you receive them. If there is any transport damaged or quality issue, don’t forget take the detail pictures and contact us as soon as possible, we will properly handle it to make sure your loss to reduce to the smallest. if it is our problem we will responsible for it.

Please feel free to contact us for detailed information.

Screws and Screw Shafts

A screw is a mechanical device that holds objects together. Screws are usually forged or machined. They are also used in screw jacks and press-fitted vises. Their self-locking properties make them a popular choice in many different industries. Here are some of the benefits of screws and how they work. Also read about their self-locking properties. The following information will help you choose the right screw for your application.

Machined screw shaft

A machined screw shaft can be made of various materials, depending on the application. Screw shafts can be made from stainless steel, brass, bronze, titanium, or iron. Most manufacturers use high-precision CNC machines or lathes to manufacture these products. These products come in many sizes and shapes, and they have varying applications. Different materials are used for different sizes and shapes. Here are some examples of what you can use these screws for:
Screws are widely used in many applications. One of the most common uses is in holding objects together. This type of fastener is used in screw jacks, vises, and screw presses. The thread pitch of a screw can vary. Generally, a smaller pitch results in greater mechanical advantage. Hence, a machined screw shaft should be sized appropriately. This ensures that your product will last for a long time.
A machined screw shaft should be compatible with various threading systems. In general, the ASME system is used for threaded parts. The threaded hole occupies most of the shaft. The thread of the bolt occupy either part of the shaft, or the entire one. There are also alternatives to bolts, including riveting, rolling pins, and pinned shafts. These alternatives are not widely used today, but they are useful for certain niche applications.
If you are using a ball screw, you can choose to anneal the screw shaft. To anneal the screw shaft, use a water-soaked rag as a heat barrier. You can choose from 2 different options, depending on your application. One option is to cover the screw shaft with a dust-proof enclosure. Alternatively, you can install a protective heat barrier over the screw shaft. You can also choose to cover the screw shaft with a dust-proof machine.
If you need a smaller size, you can choose a smaller screw. It may be smaller than a quarter of an inch, but it may still be compatible with another part. The smaller ones, however, will often have a corresponding mating part. These parts are typically denominated by their ANSI numerical size designation, which does not indicate threads-per-inch. There is an industry standard for screw sizes that is a little easier to understand.
screwshaft

Ball screw nut

When choosing a Ball screw nut for a screw shaft, it is important to consider the critical speed of the machine. This value excites the natural frequency of a screw and determines how fast it can be turned. In other words, it varies with the screw diameter and unsupported length. It also depends on the screw shaft’s diameter and end fixity. Depending on the application, the nut can be run at a maximum speed of about 80% of its theoretical critical speed.
The inner return of a ball nut is a cross-over deflector that forces the balls to climb over the crest of the screw. In 1 revolution of the screw, a ball will cross over the nut crest to return to the screw. Similarly, the outer circuit is a circular shape. Both flanges have 1 contact point on the ball shaft, and the nut is connected to the screw shaft by a screw.
The accuracy of ball screws depends on several factors, including the manufacturing precision of the ball grooves, the compactness of the assembly, and the set-up precision of the nut. Depending on the application, the lead accuracy of a ball screw nut may vary significantly. To improve lead accuracy, preloading, and lubrication are important. Ewellix ball screw assembly specialists can help you determine the best option for your application.
A ball screw nut should be preloaded prior to installation in order to achieve the expected service life. The smallest amount of preload required can reduce a ball screw’s calculated life by as much as 90 percent. Using a lubricant of a standard grade is recommended. Some lubricants contain additives. Using grease or oil in place of oil can prolong the life of the screw.
A ball screw nut is a type of threaded nut that is used in a number of different applications. It works similar to a ball bearing in that it contains hardened steel balls that move along a series of inclined races. When choosing a ball screw nut, engineers should consider the following factors: speed, life span, mounting, and lubrication. In addition, there are other considerations, such as the environment in which the screw is used.
screwshaft

Self-locking property of screw shaft

A self-locking screw is 1 that is capable of rotating without the use of a lock washer or bolt. This property is dependent on a number of factors, but 1 of them is the pitch angle of the thread. A screw with a small pitch angle is less likely to self-lock, while a large pitch angle is more likely to spontaneously rotate. The limiting angle of a self-locking thread can be calculated by calculating the torque Mkdw at which the screw is first released.
The pitch angle of the screw’s threads and its coefficient of friction determine the self-locking function of the screw. Other factors that affect its self-locking function include environmental conditions, high or low temperature, and vibration. Self-locking screws are often used in single-line applications and are limited by the size of their pitch. Therefore, the self-locking property of the screw shaft depends on the specific application.
The self-locking feature of a screw is an important factor. If a screw is not in a state of motion, it can be a dangerous or unusable machine. The self-locking property of a screw is critical in many applications, from corkscrews to threaded pipe joints. Screws are also used as power linkages, although their use is rarely necessary for high-power operations. In the archimedes’ screw, for example, the blades of the screw rotate around an axis. A screw conveyor uses a rotating helical chamber to move materials. A micrometer uses a precision-calibrated screw to measure length.
Self-locking screws are commonly used in lead screw technology. Their pitch and coefficient of friction are important factors in determining the self-locking property of screws. This property is advantageous in many applications because it eliminates the need for a costly brake. Its self-locking property means that the screw will be secure without requiring a special kind of force or torque. There are many other factors that contribute to the self-locking property of a screw, but this is the most common factor.
Screws with right-hand threads have threads that angle up to the right. The opposite is true for left-hand screws. While turning a screw counter-clockwise will loosen it, a right-handed person will use a right-handed thumb-up to turn it. Similarly, a left-handed person will use their thumb to turn a screw counter-clockwise. And vice versa.
screwshaft

Materials used to manufacture screw shaft

Many materials are commonly used to manufacture screw shafts. The most common are steel, stainless steel, brass, bronze, and titanium. These materials have advantages and disadvantages that make them good candidates for screw production. Some screw types are also made of copper to fight corrosion and ensure durability over time. Other materials include nylon, Teflon, and aluminum. Brass screws are lightweight and have aesthetic appeal. The choice of material for a screw shaft depends on the use it will be made for.
Shafts are typically produced using 3 steps. Screws are manufactured from large coils, wire, or round bar stock. After these are produced, the blanks are cut to the appropriate length and cold headed. This cold working process pressudes features into the screw head. More complicated screw shapes may require 2 heading processes to achieve the desired shape. The process is very precise and accurate, so it is an ideal choice for screw manufacturing.
The type of material used to manufacture a screw shaft is crucial for the function it will serve. The type of material chosen will depend on where the screw is being used. If the screw is for an indoor project, you can opt for a cheaper, low-tech screw. But if the screw is for an outdoor project, you’ll need to use a specific type of screw. This is because outdoor screws will be exposed to humidity and temperature changes. Some screws may even be coated with a protective coating to protect them from the elements.
Screws can also be self-threading and self-tapping. The self-threading or self-tapping screw creates a complementary helix within the material. Other screws are made with a thread which cuts into the material it fastens. Other types of screws create a helical groove on softer material to provide compression. The most common uses of a screw include holding 2 components together.
There are many types of bolts available. Some are more expensive than others, but they are generally more resistant to corrosion. They can also be made from stainless steel or aluminum. But they require high-strength materials. If you’re wondering what screws are, consider this article. There are tons of options available for screw shaft manufacturing. You’ll be surprised how versatile they can be! The choice is yours, and you can be confident that you’ll find the screw shaft that will best fit your application.

China high quality Non-Standard DIN 7971 A2-70 Double Eye Pan Head Self Screw Made in China   with Hot sellingChina high quality Non-Standard DIN 7971 A2-70 Double Eye Pan Head Self Screw Made in China   with Hot selling

China factory Customized Stainless Steel Special A2-70 Double Eye Pan Head Self Screw near me manufacturer

Product Description

 

Product Description

OEM.ODM is available Greencate is acceptable for us 
We can design drawings according to your samples, or make samples according to your drawings.
We need more detail as follow with many thanks. This will allow us to give you an accurate quotation if you need customized.
• Product:
• Material:
• Class grade:
• Order Quantity:  
• Surface treatment:
• When do you need it by?
• Where to Shipping (Country with postal code please) :
• Measure: Inside Diameter/Outside Diameter/Thickness/Length:                
• Email your drawing ( jpg, png or pdf, word) with minimum 300 dpi resolution for good clarity.

Product Name

 SPCIAL SCREW From DIN 7971

Material

  SUS304

Color

polish,self-color

Standard

DIN GB ISO JIS BA ANSI

Finished

polish ,passivation

Detailed Photos

 

 

Product Parameters

 

Screw Thread ST2.2 ST2.9 ST3.5 (ST3.9) ST4.2 ST4.8 ST5.5 ST6.3
d                
P Pitch   0.8 1.1 1.3 1.3 1.4 1.6 1.8 1.8
a max   0.8 1.1 1.3 1.3 1.4 1.6 1.8 1.8
dk max=nominal size   4.2 5.6 6.9 7.5 8.2 9.5 10.8 12.5
min   3.9 5.3 6.54 7.14 7.84 9.14 10.37 12.07
k max=nominal size   1.35 1.75 2.1 2.25 2.45 2.8 3.2 3.65
min   1.15 1.5 1.85 2 2.15 2.5 2.85 3.3
n Nominal Size   0.6 0.8 1 1 1.2 1.2 1.6 1.6
min   0.66 0.86 1.06 1.06 1.26 1.26 1.66 1.66
max   0.8 1 1.2 1.2 1.51 1.51 1.91 1.91
t min   0.55 0.75 0.95 1.05 1.15 1.35 1.55 1.8
max   0.8 1 1.25 1.4 1.5 1.7 1.95 2.2
y max Type C 2 2.6 3.2 3.5 3.7 4.3 5 6
Type F 1.6 2.1 2.5 2.7 2.8 3.2 3.6 3.6
Weight of per 1000 steel products(kg)

 

 

Packaging & Shipping

Installation Instructions

Certifications

Company Profile

ZheJiang Gentleman hardware Co., Ltd. always adhere to the principle of leading technology, quality first, customer first, and grow together with our partners around the world. Besides DIN standard products we supply also ex stock according to ISO, UNC, UNF, BSW (whit worth), BSF, ASTM and ANSI standards. Above all, our well known specialty is the delivery of deviating sizes and materials to sample or drawing. All Metal is known in the market as the specialist for special fasteners.
Hexagon head bolts and socket cap screws are also standard available in the higher grades 10.9 and 12.9. The plating company guarantees excellent finished products: electrolytic (blue, yellow or black passivized) and hot dip galvanizing are the most common standard surface treatments. But also e.g. The best surface treatment of Greencate may be applied.
Besides our focus on the machine and equipment construction we deliver to a great variety of industries like shipbuilding, petrochemical industry, furniture and electronically manufacturing. We can produce quickly in relatively small series for our Cooperation partner worldwide.
Our international trade company is located in ZheJiang city which is very close to the ZheJiang seaport and airport, can save a lot of transportation and time costs. And our Technical Engineer have 34 years’ experience in fasteners, these are how we keep superior quality and competitive offers for global valued customers.
We have good reputation in fasteners field with our long business customers because we always adhere to the principle of leading technology, quality first, customer first, and grow together with our partners around the world.
And i have been in the import and export industry for more than 15 years then can save costs from transportation, products, etc., while controlling product quality, so that you can achieve your company target.

FAQ

Q:Are you a manufacturing company or trading company? 
A: Our factory are specialized in manufacturing fasteners more than 40 years and our sales company have exporting experience for more than 16 years.

Q: Wonder if you accept small orders?
A: Do not worry. Please feel free to contact us, in order to give our clients more convenience, we accept small order.

Q: How can I get a sample to check your quality?
A: After price is confirmed, you can require samples to check our quality. Free for stock samples, but freight collect. For sample making, we will charge a sample fee. Sample fee will be confirmed according to the products’ craftwork.

Q: How can I customize my products? 
A: Attach your drawings with details. (Surface, treatment, material, quantity and special requirements etc.) . And we can print your logo according to your request and Brand Authorization Letter

Q: How long is your delivery time?
A: Generally it is 5-10 days if the goods are in stock. Or it is 15-20 days if the goods are not in stock, it is according to quantity.

Q: What is your payment term?
A: Payment=2000USD, 30%-70% T/T in advance (depending on different situations.), balance before shipment.

Q: What’s your packing?
A: Our Normal packing is bulking in Cartons, 20-25kgs/carton, 36cartons/ pallet. We also can pack products according to your requirement.

Q: Do you have after-sales service?
A: Certainly, you can contact us at any time. And we are very confident in our products, we pack them very well to make sure the goods in well protection to avoid any subsequent trouble regarding quality issue, we suggest you check the goods once you receive them. If there is any transport damaged or quality issue, don’t forget take the detail pictures and contact us as soon as possible, we will properly handle it to make sure your loss to reduce to the smallest. if it is our problem we will responsible for it.

Please feel free to contact us for detailed information.

Screws and Screw Shafts

A screw is a mechanical device that holds objects together. Screws are usually forged or machined. They are also used in screw jacks and press-fitted vises. Their self-locking properties make them a popular choice in many different industries. Here are some of the benefits of screws and how they work. Also read about their self-locking properties. The following information will help you choose the right screw for your application.

Machined screw shaft

A machined screw shaft can be made of various materials, depending on the application. Screw shafts can be made from stainless steel, brass, bronze, titanium, or iron. Most manufacturers use high-precision CNC machines or lathes to manufacture these products. These products come in many sizes and shapes, and they have varying applications. Different materials are used for different sizes and shapes. Here are some examples of what you can use these screws for:
Screws are widely used in many applications. One of the most common uses is in holding objects together. This type of fastener is used in screw jacks, vises, and screw presses. The thread pitch of a screw can vary. Generally, a smaller pitch results in greater mechanical advantage. Hence, a machined screw shaft should be sized appropriately. This ensures that your product will last for a long time.
A machined screw shaft should be compatible with various threading systems. In general, the ASME system is used for threaded parts. The threaded hole occupies most of the shaft. The thread of the bolt occupy either part of the shaft, or the entire one. There are also alternatives to bolts, including riveting, rolling pins, and pinned shafts. These alternatives are not widely used today, but they are useful for certain niche applications.
If you are using a ball screw, you can choose to anneal the screw shaft. To anneal the screw shaft, use a water-soaked rag as a heat barrier. You can choose from 2 different options, depending on your application. One option is to cover the screw shaft with a dust-proof enclosure. Alternatively, you can install a protective heat barrier over the screw shaft. You can also choose to cover the screw shaft with a dust-proof machine.
If you need a smaller size, you can choose a smaller screw. It may be smaller than a quarter of an inch, but it may still be compatible with another part. The smaller ones, however, will often have a corresponding mating part. These parts are typically denominated by their ANSI numerical size designation, which does not indicate threads-per-inch. There is an industry standard for screw sizes that is a little easier to understand.
screwshaft

Ball screw nut

When choosing a Ball screw nut for a screw shaft, it is important to consider the critical speed of the machine. This value excites the natural frequency of a screw and determines how fast it can be turned. In other words, it varies with the screw diameter and unsupported length. It also depends on the screw shaft’s diameter and end fixity. Depending on the application, the nut can be run at a maximum speed of about 80% of its theoretical critical speed.
The inner return of a ball nut is a cross-over deflector that forces the balls to climb over the crest of the screw. In 1 revolution of the screw, a ball will cross over the nut crest to return to the screw. Similarly, the outer circuit is a circular shape. Both flanges have 1 contact point on the ball shaft, and the nut is connected to the screw shaft by a screw.
The accuracy of ball screws depends on several factors, including the manufacturing precision of the ball grooves, the compactness of the assembly, and the set-up precision of the nut. Depending on the application, the lead accuracy of a ball screw nut may vary significantly. To improve lead accuracy, preloading, and lubrication are important. Ewellix ball screw assembly specialists can help you determine the best option for your application.
A ball screw nut should be preloaded prior to installation in order to achieve the expected service life. The smallest amount of preload required can reduce a ball screw’s calculated life by as much as 90 percent. Using a lubricant of a standard grade is recommended. Some lubricants contain additives. Using grease or oil in place of oil can prolong the life of the screw.
A ball screw nut is a type of threaded nut that is used in a number of different applications. It works similar to a ball bearing in that it contains hardened steel balls that move along a series of inclined races. When choosing a ball screw nut, engineers should consider the following factors: speed, life span, mounting, and lubrication. In addition, there are other considerations, such as the environment in which the screw is used.
screwshaft

Self-locking property of screw shaft

A self-locking screw is 1 that is capable of rotating without the use of a lock washer or bolt. This property is dependent on a number of factors, but 1 of them is the pitch angle of the thread. A screw with a small pitch angle is less likely to self-lock, while a large pitch angle is more likely to spontaneously rotate. The limiting angle of a self-locking thread can be calculated by calculating the torque Mkdw at which the screw is first released.
The pitch angle of the screw’s threads and its coefficient of friction determine the self-locking function of the screw. Other factors that affect its self-locking function include environmental conditions, high or low temperature, and vibration. Self-locking screws are often used in single-line applications and are limited by the size of their pitch. Therefore, the self-locking property of the screw shaft depends on the specific application.
The self-locking feature of a screw is an important factor. If a screw is not in a state of motion, it can be a dangerous or unusable machine. The self-locking property of a screw is critical in many applications, from corkscrews to threaded pipe joints. Screws are also used as power linkages, although their use is rarely necessary for high-power operations. In the archimedes’ screw, for example, the blades of the screw rotate around an axis. A screw conveyor uses a rotating helical chamber to move materials. A micrometer uses a precision-calibrated screw to measure length.
Self-locking screws are commonly used in lead screw technology. Their pitch and coefficient of friction are important factors in determining the self-locking property of screws. This property is advantageous in many applications because it eliminates the need for a costly brake. Its self-locking property means that the screw will be secure without requiring a special kind of force or torque. There are many other factors that contribute to the self-locking property of a screw, but this is the most common factor.
Screws with right-hand threads have threads that angle up to the right. The opposite is true for left-hand screws. While turning a screw counter-clockwise will loosen it, a right-handed person will use a right-handed thumb-up to turn it. Similarly, a left-handed person will use their thumb to turn a screw counter-clockwise. And vice versa.
screwshaft

Materials used to manufacture screw shaft

Many materials are commonly used to manufacture screw shafts. The most common are steel, stainless steel, brass, bronze, and titanium. These materials have advantages and disadvantages that make them good candidates for screw production. Some screw types are also made of copper to fight corrosion and ensure durability over time. Other materials include nylon, Teflon, and aluminum. Brass screws are lightweight and have aesthetic appeal. The choice of material for a screw shaft depends on the use it will be made for.
Shafts are typically produced using 3 steps. Screws are manufactured from large coils, wire, or round bar stock. After these are produced, the blanks are cut to the appropriate length and cold headed. This cold working process pressudes features into the screw head. More complicated screw shapes may require 2 heading processes to achieve the desired shape. The process is very precise and accurate, so it is an ideal choice for screw manufacturing.
The type of material used to manufacture a screw shaft is crucial for the function it will serve. The type of material chosen will depend on where the screw is being used. If the screw is for an indoor project, you can opt for a cheaper, low-tech screw. But if the screw is for an outdoor project, you’ll need to use a specific type of screw. This is because outdoor screws will be exposed to humidity and temperature changes. Some screws may even be coated with a protective coating to protect them from the elements.
Screws can also be self-threading and self-tapping. The self-threading or self-tapping screw creates a complementary helix within the material. Other screws are made with a thread which cuts into the material it fastens. Other types of screws create a helical groove on softer material to provide compression. The most common uses of a screw include holding 2 components together.
There are many types of bolts available. Some are more expensive than others, but they are generally more resistant to corrosion. They can also be made from stainless steel or aluminum. But they require high-strength materials. If you’re wondering what screws are, consider this article. There are tons of options available for screw shaft manufacturing. You’ll be surprised how versatile they can be! The choice is yours, and you can be confident that you’ll find the screw shaft that will best fit your application.

China factory Customized Stainless Steel Special A2-70 Double Eye Pan Head Self Screw   near me manufacturer China factory Customized Stainless Steel Special A2-70 Double Eye Pan Head Self Screw   near me manufacturer

China Professional SUS304 Customized Pan Head Self Screw From DIN 7971 A2-70 Double Eye with Hot selling

Product Description

 

Product Description

OEM.ODM is available Greencate is acceptable for us 
We can design drawings according to your samples, or make samples according to your drawings.
We need more detail as follow with many thanks. This will allow us to give you an accurate quotation if you need customized.
• Product:
• Material:
• Class grade:
• Order Quantity:  
• Surface treatment:
• When do you need it by?
• Where to Shipping (Country with postal code please) :
• Measure: Inside Diameter/Outside Diameter/Thickness/Length:                
• Email your drawing ( jpg, png or pdf, word) with minimum 300 dpi resolution for good clarity.

Product Name

 SPCIAL SCREW From DIN 7971

Material

  SUS304

Color

polish,self-color

Standard

DIN GB ISO JIS BA ANSI

Finished

polish ,passivation

Detailed Photos

 

 

Product Parameters

 

Screw Thread ST2.2 ST2.9 ST3.5 (ST3.9) ST4.2 ST4.8 ST5.5 ST6.3
d                
P Pitch   0.8 1.1 1.3 1.3 1.4 1.6 1.8 1.8
a max   0.8 1.1 1.3 1.3 1.4 1.6 1.8 1.8
dk max=nominal size   4.2 5.6 6.9 7.5 8.2 9.5 10.8 12.5
min   3.9 5.3 6.54 7.14 7.84 9.14 10.37 12.07
k max=nominal size   1.35 1.75 2.1 2.25 2.45 2.8 3.2 3.65
min   1.15 1.5 1.85 2 2.15 2.5 2.85 3.3
n Nominal Size   0.6 0.8 1 1 1.2 1.2 1.6 1.6
min   0.66 0.86 1.06 1.06 1.26 1.26 1.66 1.66
max   0.8 1 1.2 1.2 1.51 1.51 1.91 1.91
t min   0.55 0.75 0.95 1.05 1.15 1.35 1.55 1.8
max   0.8 1 1.25 1.4 1.5 1.7 1.95 2.2
y max Type C 2 2.6 3.2 3.5 3.7 4.3 5 6
Type F 1.6 2.1 2.5 2.7 2.8 3.2 3.6 3.6
Weight of per 1000 steel products(kg)

 

 

Packaging & Shipping

Installation Instructions

Certifications

Company Profile

ZheJiang Gentleman hardware Co., Ltd. always adhere to the principle of leading technology, quality first, customer first, and grow together with our partners around the world. Besides DIN standard products we supply also ex stock according to ISO, UNC, UNF, BSW (whit worth), BSF, ASTM and ANSI standards. Above all, our well known specialty is the delivery of deviating sizes and materials to sample or drawing. All Metal is known in the market as the specialist for special fasteners.
Hexagon head bolts and socket cap screws are also standard available in the higher grades 10.9 and 12.9. The plating company guarantees excellent finished products: electrolytic (blue, yellow or black passivized) and hot dip galvanizing are the most common standard surface treatments. But also e.g. The best surface treatment of Greencate may be applied.
Besides our focus on the machine and equipment construction we deliver to a great variety of industries like shipbuilding, petrochemical industry, furniture and electronically manufacturing. We can produce quickly in relatively small series for our Cooperation partner worldwide.
Our international trade company is located in ZheJiang city which is very close to the ZheJiang seaport and airport, can save a lot of transportation and time costs. And our Technical Engineer have 34 years’ experience in fasteners, these are how we keep superior quality and competitive offers for global valued customers.
We have good reputation in fasteners field with our long business customers because we always adhere to the principle of leading technology, quality first, customer first, and grow together with our partners around the world.
And i have been in the import and export industry for more than 15 years then can save costs from transportation, products, etc., while controlling product quality, so that you can achieve your company target.

FAQ

Q:Are you a manufacturing company or trading company? 
A: Our factory are specialized in manufacturing fasteners more than 40 years and our sales company have exporting experience for more than 16 years.

Q: Wonder if you accept small orders?
A: Do not worry. Please feel free to contact us, in order to give our clients more convenience, we accept small order.

Q: How can I get a sample to check your quality?
A: After price is confirmed, you can require samples to check our quality. Free for stock samples, but freight collect. For sample making, we will charge a sample fee. Sample fee will be confirmed according to the products’ craftwork.

Q: How can I customize my products? 
A: Attach your drawings with details. (Surface, treatment, material, quantity and special requirements etc.) . And we can print your logo according to your request and Brand Authorization Letter

Q: How long is your delivery time?
A: Generally it is 5-10 days if the goods are in stock. Or it is 15-20 days if the goods are not in stock, it is according to quantity.

Q: What is your payment term?
A: Payment=2000USD, 30%-70% T/T in advance (depending on different situations.), balance before shipment.

Q: What’s your packing?
A: Our Normal packing is bulking in Cartons, 20-25kgs/carton, 36cartons/ pallet. We also can pack products according to your requirement.

Q: Do you have after-sales service?
A: Certainly, you can contact us at any time. And we are very confident in our products, we pack them very well to make sure the goods in well protection to avoid any subsequent trouble regarding quality issue, we suggest you check the goods once you receive them. If there is any transport damaged or quality issue, don’t forget take the detail pictures and contact us as soon as possible, we will properly handle it to make sure your loss to reduce to the smallest. if it is our problem we will responsible for it.

Please feel free to contact us for detailed information.

Types of Screw Shafts

Screw shafts come in various types and sizes. These types include fully threaded, Lead, and Acme screws. Let’s explore these types in more detail. What type of screw shaft do you need? Which 1 is the best choice for your project? Here are some tips to choose the right screw:

Machined screw shaft

The screw shaft is a basic piece of machinery, but it can be further customized depending on the needs of the customer. Its features include high-precision threads and ridges. Machined screw shafts are generally manufactured using high-precision CNC machines or lathes. The types of screw shafts available vary in shape, size, and material. Different materials are suitable for different applications. This article will provide you with some examples of different types of screw shafts.
Ball screws are used for a variety of applications, including mounting machines, liquid crystal devices, measuring devices, and food and medical equipment. Various shapes are available, including miniature ball screws and nut brackets. They are also available without keyway. These components form a high-accuracy feed mechanism. Machined screw shafts are also available with various types of threaded ends for ease of assembly. The screw shaft is an integral part of linear motion systems.
When you need a machined screw shaft, you need to know the size of the threads. For smaller machine screws, you will need a mating part. For smaller screw sizes, the numbers will be denominated as industry Numeric Sizes. These denominations are not metric, but rather in mm, and they may not have a threads-per-inch designation. Similarly, larger machine screws will usually have threads that have a higher pitch than those with a lower pitch.
Another important feature of machine screws is that they have a thread on the entire shaft, unlike their normal counterparts. These machine screws have finer threads and are intended to be screwed into existing tapped holes using a nut. This means that these screws are generally stronger than other fasteners. They are usually used to hold together electronic components, industrial equipment, and engines. In addition to this, machine screws are usually made of a variety of materials.
screwshaft

Acme screw

An Acme screw is the most common type of threaded shaft available. It is available in a variety of materials including stainless steel and carbon steel. In many applications, it is used for large plates in crushing processes. ACME screws are self-locking and are ideal for applications requiring high clamping force and low friction. They also feature a variety of standard thread forms, including knurling and rolled worms.
Acme screws are available in a wide range of sizes, from 1/8″ to 6″. The diameter is measured from the outside of the screw to the bottom of the thread. The pitch is equal to the lead in a single start screw. The lead is equal to the pitch plus the number of starts. A screw of either type has a standard pitch and a lead. Acme screws are manufactured to be accurate and durable. They are also widely available in a wide range of materials and can be customized to fit your needs.
Another type of Acme screw is the ball screw. These have no back drive and are widely used in many applications. Aside from being lightweight, they are also able to move at faster speeds. A ball screw is similar to an Acme screw, but has a different shape. A ball screw is usually longer than an Acme screw. The ball screw is used for applications that require high linear speeds. An Acme screw is a common choice for many industries.
There are many factors that affect the speed and resolution of linear motion systems. For example, the nut position and the distance the screw travels can all affect the resolution. The total length of travel, the speed, and the duty cycle are all important. The lead size will affect the maximum linear speed and force output. If the screw is long, the greater the lead size, the higher the resolution. If the lead length is short, this may not be the most efficient option.
screwshaft

Lead screw

A lead screw is a threaded mechanical device. A lead screw consists of a cylindrical shaft, which includes a shallow thread portion and a tightly wound spring wire. This spring wire forms smooth, hard-spaced thread convolutions and provides wear-resistant engagement with the nut member. The wire’s leading and trailing ends are anchored to the shaft by means appropriate to the shaft’s composition. The screw is preferably made of stainless steel.
When selecting a lead screw, 1 should first determine its critical speed. The critical speed is the maximum rotations per minute based on the natural frequency of the screw. Excessive backlash will damage the lead screw. The maximum number of revolutions per minute depends on the screw’s minor diameter, length, assembly alignment, and end fixity. Ideally, the critical speed is 80% of its evaluated critical speed. A critical speed is not exceeded because excessive backlash would damage the lead screw and may be detrimental to the screw’s performance.
The PV curve defines the safe operating limits of a lead screw. This relationship describes the inverse relationship between contact surface pressure and sliding velocity. As the PV value increases, a lower rotation speed is required for heavier axial loads. Moreover, PV is affected by material and lubrication conditions. Besides, end fixity, which refers to the way the lead screw is supported, also affects its critical speed. Fixed-fixed and free end fixity are both possible.
Lead screws are widely used in industries and everyday appliances. In fact, they are used in robotics, lifting equipment, and industrial machinery. High-precision lead screws are widely used in the fields of engraving, fluid handling, data storage, and rapid prototyping. Moreover, they are also used in 3D printing and rapid prototyping. Lastly, lead screws are used in a wide range of applications, from measuring to assembly.

Fully threaded screw

A fully threaded screw shaft can be found in many applications. Threading is an important feature of screw systems and components. Screws with threaded shafts are often used to fix pieces of machinery together. Having fully threaded screw shafts ensures that screws can be installed without removing the nut or shaft. There are 2 major types of screw threads: coarse and fine. When it comes to coarse threads, UTS is the most common type, followed by BSP.
In the 1840s, a British engineer named Joseph Whitworth created a design that was widely used for screw threads. This design later became the British Standard Whitworth. This standard was used for screw threads in the United States during the 1840s and 1860s. But as screw threads evolved and international standards were established, this system remained largely unaltered. A new design proposed in 1864 by William Sellers improved upon Whitworth’s screw threads and simplified the pitch and surface finish.
Another reason for using fully threaded screws is their ability to reduce heat. When screw shafts are partially threaded, the bone grows up to the screw shaft and causes the cavity to be too narrow to remove it. Consequently, the screw is not capable of backing out. Therefore, fully threaded screws are the preferred choice for inter-fragmentary compression in children’s fractures. However, surgeons should know the potential complication when removing metalwork.
The full thread depth of a fully threaded screw is the distance at which a male thread can freely thread into the shaft. This dimension is typically 1 millimeter shy of the total depth of the drilled hole. This provides space for tap lead and chips. The full-thread depth also makes fully threaded screws ideal for axially-loaded connections. It is also suitable for retrofitting applications. For example, fully threaded screws are commonly used to connect 2 elements.
screwshaft

Ball screw

The basic static load rating of a ball screw is determined by the product of the maximum axial static load and the safety factor “s0”. This factor is determined by past experience in similar applications and should be selected according to the design requirements of the application. The basic static load rating is a good guideline for selecting a ball screw. There are several advantages to using a ball screw for a particular application. The following are some of the most common factors to consider when selecting a ball screw.
The critical speed limit of a ball screw is dependent on several factors. First of all, the critical speed depends on the mass, length and diameter of the shaft. Second, the deflection of the shaft and the type of end bearings determine the critical speed. Finally, the unsupported length is determined by the distance between the ball nut and end screw, which is also the distance between bearings. Generally, a ball screw with a diameter greater than 1.2 mm has a critical speed limit of 200 rpm.
The first step in manufacturing a high-quality ball screw is the choice of the right steel. While the steel used for manufacturing a ball screw has many advantages, its inherent quality is often compromised by microscopic inclusions. These microscopic inclusions may eventually lead to crack propagation, surface fatigue, and other problems. Fortunately, the technology used in steel production has advanced, making it possible to reduce the inclusion size to a minimum. However, higher-quality steels can be expensive. The best material for a ball screw is vacuum-degassed pure alloy steel.
The lead of a ball screw shaft is also an important factor to consider. The lead is the linear distance between the ball and the screw shaft. The lead can increase the amount of space between the balls and the screws. In turn, the lead increases the speed of a screw. If the lead of a ball screw is increased, it may increase its accuracy. If not, the lead of a ball screw can be improved through preloading, lubrication, and better mounting accuracy.

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