China Good quality Grade 80 G80 Adjustable Eye Screw Lifting Point with high quality

Product Description

G80 Lifting Screw Point


1. Material: Super Alloy Steel
2. Size: M8 – M64
3. Surface: Powder Coated
4. Working Load: 0.3 Ton – 25 Ton
5. Color: Red, Yellow, Bule, etc.
6. Technology: Drop forged, Quenched, Tempered
7. Certificates: BV, ISO9001:2008 SGS, CE
8. Brand: Powerful Machinery

M8 0.41 0.3 0.6 M8X13 36 16.5 51 41 55 30 14 3 1
M10 0.43 0.5 0.9 M10X18 36 16.5 51 41 55 30 14 3 1
M10X90 0.38 0.5 1 M10X90 36 16.5 51 41 55 30 14 3 1
M12 0.44 0.5 1 M12X18 36 16.5 51 41 55 30 14 3 1
M12X40 0.52 0.5 1 M12X40 36 16.5 51 41 55 30 14 3 1
M12X45 0.47 0.5 1 M12X45 36 16.5 51 41 55 30 14 3 1
M12X110 0.53 0.5 1 M12X110 36 16.5 51 41 55 30 14 3 1
M14 0.45 1.12 2 M14X20 36 16.5 51 41 55 30 14 3 1
M16 0.46 1.12 2 M16X35 36 16.5 52 42 55 30 14 3 1
M16X40 0.48 1.12 2 M16X40 36 16.5 52 42 55 30 14 3 1
M16X100 0.54 1.12 2 M16X100 36 16.5 52 42 55 30 14 3 1
M16X120 0.6 1.12 2 M16X120 36 16.5 52 42 55 30 14 3.5 1
M20 0.96 2 4 M20X30 49.5 19 68 56 70 35 16 3.5 1
M20X120 1.17 2 4 M20X120 49.5 19 68 56 70 35 16 3.5 1
M24 1.45 3.15 6.3 M24X40 57 22 78 65.5 85 40 18 3.5 1.5
M24X40 1.42 3.15 6.3 M24X90 57 22 78 65.5 85 40 18 3.5 1.5
M24X90 1.66 3.15 6.3 M24X90 57 22 78 65.5 85 40 18 3.5 1.5
M24X120 1.74 3.15 6.3 M24X120 57 22 78 65.5 85 40 18 3.5 1.5
M27 1.47 3.15 6.3 M27X35 57 22 78 65.5 85 40 20 3.5 1.5
M30(5T) 2.17 5.3 10.6 M30X35 66 23.5 96.5 80.5 85 40 20 4 1.5
M30X38 2.18 5.3 10.6 M30X38 66 23.5 96.5 80.5 85 40 20 4 1.5
M30X120 2.65 5.3 10.6 M30X120 66 23.5 96.5 80.5 85 40 22 4 1.5
M30(8T) 3.57 8 11.8 M30X35 80 28 112 92 115 50 22 6 2
M30X38 3.58 8 11.8 M30X38 80 28 112 92 115 50 22 6 2
M30X120 4.01 8 11.8 M30X120 80 28 112 92 115 50 22 6 2
M36X90 4.17 8 11.8 M36X90 80 27 109 89.5 115 50 22 6 2
M36X400 6.41 8 11.8 M36X400 80 27 109 89.5 115 50 22 6 2
M39 3.65 8 11.8 M39X50 80 27 109 89.5 115 50 22 6 2
M39X90 3.71 8 11.8 M39X90 80 27 109 89.5 115 50 22 6 2
M42 3.62 10 15 M42X50 80 27 109 89.5 115 50 25 6 2.5
M42X60 6.72 10 15 M42X60 80 27 109 89.5 115 50 25 6 2.5
M42X130 4.46 10 15 M42X130 80 27 109 89.5 115 50 25 6 2.5
M42X180 5 10 15 M42X180 80 27 109 89.5 115 50 25 6 2.5
M45X60 4.17 10 15 M45X60 80 27 109 89.5 115 50 25 6 2.5
M48 4.02 10 15 M48X50 80 27 109 89.5 115 50 25 6 2.5
M48X110 4.8 10 15 M48X110 80 27 109 89.5 115 50 25 6 2.5
M56X84 11.6 15 25 M56X84 117 42 310 280 152 70 32 7 2.5
M64X95 12.4 15 25 M64X95 117 42 310 280 152 70 32 7 2.5

Related Products
Eye Bolt DIN580, Eye Nut DIN582, BS4278 Collared Eye Bolt, BS529 Collared Eye Bolt, JIS B 1168 Eye Bolt, JIS B 1169 Eye Nut,
G291 Drop Forged Eye Bolt, G80 Lifting Screw Point, Rectangular Base Eye Plates, etc.


Hot Sale Products

Our most popular products include Chains, Anchor Chains, Hooks, Shackles, Turnbuckles, Load Binders, Eye Bolts & Eye Nuts, Wire Rope, Wire Rope Clips, Wire Rope Thimble, Swivels, Snap Hook, Rings and links, Webblings, Pulley&Block, Sockets, Stainless Steel Products, etc.

*The sizes are various.
*Customized service is available. 
*The materials can be high quality Carbon Steel, Alloy Steel, Stainless Steel, Plastic, Polyester Fibre, etc.

Our Factory

We started as an anchor chain factory, CZPT Anchor Chain Co. Ltd, about 20 years ago in HangZhou, China, and gradually developed into a big manufacturer of marine hardware supplies.  At the same time, in order to meet the growing demands from our clients in various business areas, we established our tradingbrand – Powerful Machinery, and expanded our scope to rigging hardware and fasteners, and also set up solid partnership with other factories.    

Now we’re proud to say that CZPT has ranked as the top supplier on marine & rigging hardware in the northern China!

Our Office

HangZhou CZPT Co., Ltd has eastablished for about 11 years, we specializing in producing and exporting rigging hardwares, high grade chains, blocks & pulleys, steel wire rope, stainless steel and so on. Our products are all designed, manufactured and assembled under strict quality control. We have a professional QC team to do inspections.  And we can offer favorable prices, good quality and one-stop sourcing service. We are all ready for every customer and to be the pioneer is our mission.

All members of our company will be very honored if you contact us. We are looking forward to cooperating with you in the near future!


Powerful Machinery   FAQ

1.Are you a factory or trading company?
We started as an anchor chain factory about 20 years ago and gradually developed into a big manufacturer in marine supplies.At the same time, to meet the growing demands from our clients in new business areas, we expanded our scope to rigging hardware and fasteners, and other related hardware by setting up solid partnership with other factories.Now we’re proud to say that POWERFUL has ranked as a top supplier on chains & rigging hardware in China.

2.Where is your factory located?
Our factory is located at #37, Wenhua Road, Xihu (West Lake) Dis., HangZhou City, ZheJiang Province, China.
You’re welcomed to visit us any time for future cooperation.

3.What products do you supply?
As mentioned above, HangZhou CZPT is capable of supplying:
All kinds of marine supplies, Chains, Rigging hardwares, Fasteners and related hardwares

4.Do you produce them all?
We produce all kinds of chains in our factory, other products in our partner factories.By establishing cooperation agreements & capital injection, we obtained a wide & solid supply chain to meet your demands.

5.How do you control quality?
By setting up quality control points and inspecting at each production process with strict standards, the defective products will be eliminated before packaging and delivery.For partner factories, we use a comprehensive system of quality standards to evaluate the production line.Also our professional QC team will implement the onsite check and finish product check before delivery.

6.Why are you more trustworthy than the other factories?
Quick Response:
We feedback your questions immediately 24 hours a day, 7 days every week.
Competitive Price:
We can provide a more competitive price based on the same quality level by more efficient management in every process.
One-stop Solution:
Just say what you need, and we’ll figure out a one-stop solution for your business to save your time and effort.

7.How do I pay?
We accept 30% payment in advance & 70% before shipment for the first cooperation, either by T/T or L/C.

8.How do I receive the goods?
With our professional transport agents, we are capable of delivery products to most ports all over the world.Door-to-door service is also supported.
FOB, C&F, CIF are most commonly used trade terms.

Our Advantages

1. Quick Response:
Reply your inquiry in 24 working hours.
2. Full English Service:
Experienced staff answer all of your questions in professional and fluent English.
3. OEM & ODM:
Customized size, length and design are available.
4. Creative One-Stop Solutions:
Exclusive and unique solution can be provided to our customer by our well-trained and professional engineers. 


We Listen, We Learn & We Love our Costumers!
Best Service, Best Quality & Best Price will be offered!

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.

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.

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.

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.

China Good quality Grade 80 G80 Adjustable Eye Screw Lifting Point   with high qualityChina Good quality Grade 80 G80 Adjustable Eye Screw Lifting Point   with high quality