Type: Ceramic Rods
Application: Industrial Ceramic
Material: Alumina Ceramic, Alumina Ceramic
Processing Service: Bending, Welding, Cutting, Punching, Decoiling, Moulding
Product name: Alumina Ceramic Tube/ Sleeve/ Bush
Color: White
Shape: Ceramic Tube
Max Use Temperature: 1800 ℃
Size: Customized Size
Package: Protection safe packing
Tolerance: ±0.001 mm or custom
Usage: Ceramic Sleeve
Feature: High heat resistant
Packaging Details: Plastic box with sponge,Pearl cotton, carton
Port: FOB HangZhou

Specification

Product Name	Alumina Ceramic Tube/ Sleeve/ Bush
Material	Alumina Ceramic
Color	White
Standard	SGS ROHS
Ra	Customized by drawing
Application	structure ceramic part
Density	3.65-3.89 g/cm3
Size	Customized by drawing
Tolerance	+/-0.001mm
Transeverse breaking strength	345~379 MPa min
Coefficient of expansion	8.5*10^-6°/K max

Si3N4 ceramic rod has great performance in inslulation, self-lubrication, high wear resistance, makes it performace well in different piston or shaft products. Characteristics of Ceramic rod Products1. High purity, chemical resistance, good corrosion resistance, self-lubrication.2. Good temperature resistance, long-term use at 1200 degrees Celsius, short-term 900 degrees Celsius.3. It has good quench and heat resistance and is not easy to burst.4. Self lubrication and smooth surface, can be a high end decofation. Company Profile Sandingsheng Technology (HangZhou) Company Limited3X Ceramic Parts Company has been a leading participating supplier of developing and supplying various types of advanced ceramic components. We provide a wide selection of technical ceramics including Alumina Oxide, Zirconia Oxide, Silicon Nitride, Aluminum Nitride, Silicone Carbide Boron Nitride and Machinable Ceramic Components, etc. Our core competitive ceramic parts include ceramic tubes, rod, ceramic substrate, plate, ceramic guide pin, ceramic plungers, High Quality Leaf Springs Truck Parts Leaf Springs Various Types Leaf Spring ceramic crucible, ceramic piston cylinder, various type of ceramic structural parts which are widely used in the fields of furnace, semiconductor, aerospace, pumps and valves, new energy, fluid controlling, machinery wearable parts, etc. 3X Ceramic Parts Company integrated variety of ceramic resources in China in the aspects of ceramic forming and machining way. We could select the most suitable way according to different custom made parts and engineering demands. One side the product quality could be more easily controlled comparatively, the other side the costs are also saved for the customer. Offering the idea solution for customer’s different application demands is our aim, no matter whether it is on cost or engineering solution, we aim to find the most reasonable way. Request a quota from 3X ceramic parts now! We are a leading participating supplier of developing and supplying various types of advanced ceramic components. We provide a wide selection of technical ceramics including Alumina Oxide Certifications Exhibition Our Advantages Packing & Delivery Safty packing：we promise to carry out strict safety packaging process for all ceramic products. All products will be packaged with pearl cotton, bubble r paper pad at first, with foam for the second times, and finally with carton or wooden box for the last times FAQ 1. who are we?We are based in ZheJiang , China, start from 2018,sell to South Asia(10.00%),Southern Europe(10.00%),Northern Europe(10.00%),Western Europe(10.00%),Eastern Asia(10.00%),Mid East(10.00%),Oceania(10.00%),Southeast Asia(10.00%), Top Products Rice Transplanter Spare Parts Rice Wheels Engine Parts Used In CZPT Eastern Europe(10.00%),North America(10.00%). There are total about 11-50 people in our office.2. how can we guarantee quality?Always a pre-production sample before mass production;Always final Inspection before shipment;3.what can you buy from us?ceramic tube,ceramic guide pin,ceramic substrate,ceramic end effector,ceramic plunger4. why should you buy from us not from other suppliers?Sanding sheng Technology Co has been leading participating supplier of developing and supplying various types of advanced ceramic components. We provide a wide selection of technical ceramics including Alumina Oxide, Zirconia Oxide, Silicon Nitride etc.5. what services can we provide?Accepted Delivery Terms: FOB,CFR,CIF,EXW,DDP,DDU,Express Delivery,DAF；Accepted Payment Currency:USD,EUR,AUD,HKD,CNY;Accepted Payment Type: T/T,MoneyGram,Credit Card,PayPal,Western Union,Cash,Escrow; Caravan Trailer Full Kit 2000 kg Tandem Trailer Axle with Roller Rocker Tandem Leaf Spring Suspension Language Spoken:English,Chinese

Screw Sizes and Their Uses

Screws have different sizes and features. This article will discuss screw sizes and their uses. There are two main types: right-handed and left-handed screw shafts. Each screw features a point that drills into the object. Flat tipped screws, on the other hand, need a pre-drilled hole. These screw sizes are determined by the major and minor diameters. To determine which size of screw you need, measure the diameter of the hole and the screw bolt’s thread depth.

The major diameter of a screw shaft

The major diameter of a screw shaft is the distance from the outer edge of the thread on one side to the tip of the other. The minor diameter is the inner smooth part of the screw shaft. The major diameter of a screw is typically between two and sixteen inches. A screw with a pointy tip has a smaller major diameter than one without. In addition, a screw with a larger major diameter will have a wider head and drive.
The thread of a screw is usually characterized by its pitch and angle of engagement. The pitch is the angle formed by the helix of a thread, while the crest forms the surface of the thread corresponding to the major diameter of the screw. The pitch angle is the angle between the gear axis and the pitch surface. Screws without self-locking threads have multiple starts, or helical threads.
The pitch is a crucial component of a screw’s threading system. Pitch is the distance from a given thread point to the corresponding point of the next thread on the same shaft. The pitch line is one element of pitch diameter. The pitch line, or lead, is a crucial dimension for the thread of a screw, as it controls the amount of thread that will advance during a single turn.

The pitch diameter of a screw shaft

When choosing the appropriate screw, it is important to know its pitch diameter and pitch line. The pitch line designates the distance between adjacent thread sides. The pitch diameter is also known as the mean area of the screw shaft. Both of these dimensions are important when choosing the correct screw. A screw with a pitch of 1/8 will have a mechanical advantage of 6.3. For more information, consult an application engineer at Roton.
The pitch diameter of a screw shaft is measured as the distance between the crest and the root of the thread. Threads that are too long or too short will not fit together in an assembly. To measure pitch, use a measuring tool with a metric scale. If the pitch is too small, it will cause the screw to loosen or get stuck. Increasing the pitch will prevent this problem. As a result, screw diameter is critical.
The pitch diameter of a screw shaft is measured from the crest of one thread to the corresponding point on the next thread. Measurement is made from one thread to another, which is then measured using the pitch. Alternatively, the pitch diameter can be approximated by averaging the major and minor diameters. In most cases, the pitch diameter of a screw shaft is equal to the difference between the two.

The thread depth of a screw shaft

Often referred to as the major diameter, the thread depth is the outermost diameter of the screw. To measure the thread depth of a screw, use a steel rule, micrometer, or caliper. In general, the first number in the thread designation indicates the major diameter of the thread. If a section of the screw is worn, the thread depth will be smaller, and vice versa. Therefore, it is good practice to measure the section of the screw that receives the least amount of use.
In screw manufacturing, the thread depth is measured from the crest of the screw to the root. The pitch diameter is halfway between the major and minor diameters. The lead diameter represents the amount of linear distance traveled in one revolution. As the lead increases, the load capacity decreases. This measurement is primarily used in the construction of screws. However, it should not be used for precision machines. The thread depth of a screw shaft is essential for achieving accurate screw installation.
To measure the thread depth of a screw shaft, the manufacturer must first determine how much material the thread is exposed to. If the thread is exposed to side loads, it can cause the nut to wedge. Because the nut will be side loaded, its thread flanks will contact the nut. The less clearance between the nut and the screw, the lower the clearance between the nut and the screw. However, if the thread is centralized, there is no risk of the nut wedgeing.

The lead of a screw shaft

Pitch and lead are two measurements of a screw’s linear distance per turn. They’re often used interchangeably, but their definitions are not the same. The difference between them lies in the axial distance between adjacent threads. For single-start screws, the pitch is equal to the lead, while the lead of a multi-start screw is greater than the pitch. This difference is often referred to as backlash.
There are two ways to calculate the pitch and lead of a screw. For single-start screws, the lead and pitch are equal. Multiple-start screws, on the other hand, have multiple starts. The pitch of a multiple-start screw is the same as its lead, but with two or more threads running the length of the screw shaft. A square-thread screw is a better choice in applications requiring high load-bearing capacity and minimal friction losses.
The PV curve defines the safe operating limits of lead screw assemblies. It describes the inverse relationship between contact surface pressure and sliding velocity. As the load increases, the lead screw assembly must slow down in order to prevent irreversible damage from frictional heat. Furthermore, a lead screw assembly with a polymer nut must reduce rpm as the load increases. The more speed, the lower the load capacity. But, the PV factor must be below the maximum allowed value of the material used to make the screw shaft.

The thread angle of a screw shaft

The angle between the axes of a thread and the helix of a thread is called the thread angle. A unified thread has a 60-degree angle in all directions. Screws can have either a tapped hole or a captive screw. The screw pitch is measured in millimeters (mm) and is usually equal to the screw major diameter. In most cases, the thread angle will be equal to 60-degrees.
Screws with different angles have various degrees of thread. Originally, this was a problem because of the inconsistency in the threading. However, Sellers’s thread was easier to manufacture and was soon adopted as a standard throughout the United States. The United States government began to adopt this thread standard in the mid-1800s, and several influential corporations in the railroad industry endorsed it. The resulting standard is called the United States Standard thread, and it became part of the ASA’s Vol. 1 publication.
There are two types of screw threads: coarse and fine. The latter is easier to tighten and achieves tension at lower torques. On the other hand, the coarse thread is deeper than the fine one, making it easier to apply torque to the screw. The thread angle of a screw shaft will vary from bolt to bolt, but they will both fit in the same screw. This makes it easier to select the correct screw.

The tapped hole (or nut) into which the screw fits

A screw can be re-threaded without having to replace it altogether. The process is different than that of a standard bolt, because it requires threading and tapping. The size of a screw is typically specified by its major and minor diameters, which is the inside distance between threads. The thread pitch, which is the distance between each thread, is also specified. Thread pitch is often expressed in threads per inch.
Screws and bolts have different thread pitches. A coarse thread has fewer threads per inch and a longer distance between threads. It is therefore larger in diameter and longer than the material it is screwed into. A coarse thread is often designated with an “A” or “B” letter. The latter is generally used in smaller-scale metalworking applications. The class of threading is called a “threaded hole” and is designated by a letter.
A tapped hole is often a complication. There is a wide range of variations between the sizes of threaded holes and nut threads, so the tapped hole is a critical dimension in many applications. However, even if you choose a threaded screw that meets the requisite tolerance, there may be a mismatch in the thread pitch. This can prevent the screw from freely rotating.

editor by czh 2023-03-20