Tag Archives: flange screw

China OEM OEM SS304 SS316 Non-Standard Hexagon Flange Head Slotted Stainless Steel Self Tapping Screw with Free Design Custom

Product Description

OEM SS304 SS316 Non-standard Hexagon Flange Head Slotted Stainless Steel Self Tapping Screw

 

Quotation

According to your drawing(size, material,and required technology, etc)

ToleranceSurface Roughness

+/-0.005 – 0.01mm(Custonize avaiable)Ra0.2 – Ra3.2(Custonize avaiable)

Materials Avaiable

Such as aluminum, copper, stainless steel, iron, PE, PVC, ABS, etc.

Surface Treatment

Polishing, general/hard oxidation/oxidation, surface chamfering, tempering, , etc.

Processing

CNC Turning, Milling, drilling, auto lathe, tapping, bushing, surface treatment, etc.

Testing Equipment

CMM/Tool microscope/multi-joint arm/Automatic height gauge/Manual height gauge/Dial gauge/Roughness measurement

Drawing Formats

PRO/E, Auto CAD, Solid Works , UG, CAD / CAM / CAE, PDF

Our Advantages

1.) 24 hours online service & Quickly Quote/Delivery.

 2.) 100% QC quality inspection before delivery, can provide quality inspection form.
3.) 18+ years of experience in the CNC machining area and have a senior design team to offer perfect modification suggestions.

Product name Custom Cup Head Socket Shoulder Screw
Available Material Carbon steel,alloy steel,stainless steel,brass,aluminium
Industrial process Colding heading,cnc machining ,thread rolling ,cnc lathe,cnc grinding ,wire cuts ects
Heat treatment Tempering,Hardening,Spheroidizing,Stress Relieving
Surface Black oxide oxide,Zinc,clear,nature,ni-plated,tin-plated,chrome plated,passivated,sandblast and anodize,
Tolerance As your requirement.
Application Auto,building ,agriculture, home appliances,solar,furniture,mold,valve ects
Inspection QC+inspection equipment 
Drawing Format Pdf/JPEG/Ai/Psd/CAD/Dwg/Step/Igs/solidwork
Delivery Usually 15-30 days
Grade 4.8,5.6,6.8, 8.8, 10.9, 12.9, A2-70, A480 ects

Inspections:
3D instruments, 2D instruments, Projectors, Height Gauges, Inner diameter dial indicators, Dial gaues, 
Thread and Pin gauges, Digital calipers,Micro calipers, Thickness testers, Hardness testers Roughness 
testers, etc.( Detection accuracy to 0.001 millimetre )

   Packing:
   1: Shrink film+ bulk loading
   2: Shrink film +Carton box + Pallet/ wooden case
   3: PP + Wooden case
   4: As per customers’ requirements or negotiated

       1. High skilled and well-trained working team under good management environment;
       2. Quick response and support for any inquiries;
       3. Over 10 years professional manufacture experience to ensure high quality of your products;
       4. Large and strong production capacity to meet your demand;
       5. High Quality standard and hygienic environment;
       6. We have very strict quality control process: 
       a. In coming Quality control (IQC) – All incoming raw material are checked before used.
       b. In process quality control (IPQC) – Perform inspections during the manufacturing process.
       c. Final quality control (FQC) – All finished goods are inspected according to our quality
       standard for each products. 
       d. Outgoing Quality Control (OQC) – Our QC team will 100% full inspection before it goes
       out for shipment. 
       7. Good after sales services.   
       

        Q: Why choose CZPT product?
        A: We CZPT have our own plant– HangZhou CZPT machinery Co., Ltd, therefore, we can surely
        promise the quality of every product and provide you comparable price.

        Q: Do you provide OEM Service?
        A: Yes, we provide OEM Service.
 
        Q: Do you provide customized forging products?
        A: Yes. Customers give us drawings and specifications, and we will manufact accordingly.

        Q: What is your payment term?
        A: We provide kinds of payment terms such as L/C, T/T, Paypal, Escrow, etc.


Quality First, Price Best, Service Foremost!
We assure you of our best services at all times!

Screw Shaft Types and Uses

Various uses for the screw shaft are numerous. Its major diameter is the most significant characteristic, while other aspects include material and function are important. Let us explore these topics in more detail. There are many different types of screw shafts, which include bronze, brass, titanium, and stainless steel. Read on to learn about the most common types. Listed below are some of the most common uses for a screw shaft. These include: C-clamps, screw jacks, vises, and more.
screwshaft

Major diameter of a screw shaft

A screw’s major diameter is measured in fractions of an inch. This measurement is commonly found on the screw label. A screw with a major diameter less than 1/4″ is labeled #0 to #14; those with a larger diameter are labeled fractions of an inch in a corresponding decimal scale. The length of a screw, also known as the shaft, is another measure used for the screw.
The major diameter of a screw shaft is the greater of its 2 outer diameters. When determining the major diameter of a screw, use a caliper, micrometer, or steel rule to make an accurate measurement. Generally, the first number in the thread designation refers to the major diameter. Therefore, if a screw has a thread of 1/2-10 Acme, the major diameter of the thread is.500 inches. The major diameter of the screw shaft will be smaller or larger than the original diameter, so it’s a good idea to measure the section of the screw that’s least used.
Another important measurement is the pitch. This measures the distance between 1 thread’s tip and the next thread’s corresponding point. Pitch is an important measurement because it refers to the distance a screw will advance in 1 turn. While lead and pitch are 2 separate concepts, they are often used interchangeably. As such, it’s important to know how to use them properly. This will make it easier to understand how to select the correct screw.
There are 3 different types of threads. The UTS and ISO metric threads are similar, but their common values for Dmaj and Pmaj are different. A screw’s major diameter is the largest diameter, while the minor diameter is the lowest. A nut’s major diameter, or the minor diameter, is also called the nut’s inside diameter. A bolt’s major diameter and minor diameter are measured with go/no-go gauges or by using an optical comparator.
The British Association and American Society of Mechanical Engineers standardized screw threads in the 1840s. A standard named “British Standard Whitworth” became a common standard for screw threads in the United States through the 1860s. In 1864, William Sellers proposed a new standard that simplified the Whitworth thread and had a 55 degree angle at the tip. Both standards were widely accepted. The major diameter of a screw shaft can vary from 1 manufacturer to another, so it’s important to know what size screw you’re looking for.
In addition to the thread angle, a screw’s major diameter determines the features it has and how it should be used. A screw’s point, or “thread”, is usually spiky and used to drill into an object. A flat tipped screw, on the other hand, is flat and requires a pre-drilled hole for installation. Finally, the diameter of a screw bolt is determined by the major and minor diameters.
screwshaft

Material of a screw shaft

A screw shaft is a piece of machine equipment used to move raw materials. The screw shaft typically comprises a raw material w. For a particular screw to function correctly, the raw material must be sized properly. In general, screw shafts should have an axial-direction length L equal to the moving amount k per 1/2 rotation of the screw. The screw shaft must also have a proper contact angle ph1 in order to prevent raw material from penetrating the screw shaft.
The material used for the shaft depends on its application. A screw with a ball bearing will work better with a steel shaft than 1 made of aluminum. Aluminum screw shafts are the most commonly used for this application. Other materials include titanium. Some manufacturers also prefer stainless steel. However, if you want a screw with a more modern appearance, a titanium shaft is the way to go. In addition to that, screws with a chromium finish have better wear resistance.
The material of a screw shaft is important for a variety of applications. It needs to have high precision threads and ridges to perform its function. Manufacturers often use high-precision CNC machines and lathes to create screw shafts. Different screw shafts can have varying sizes and shapes, and each 1 will have different applications. Listed below are the different materials used for screw shafts. If you’re looking for a high-quality screw shaft, you should shop around.
A lead screw has an inverse relationship between contact surface pressure and sliding velocity. For heavier axial loads, a reduced rotation speed is needed. This curve will vary depending on the material used for the screw shaft and its lubrication conditions. Another important factor is end fixity. The material of a screw shaft can be either fixed or free, so make sure to consider this factor when choosing the material of your screw. The latter can also influence the critical speed and rigidity of the screw.
A screw shaft’s major diameter is the distance between the outer edge of the thread and the inner smooth part. Screw shafts are typically between 2 and 16 millimeters in diameter. They feature a cylindrical shape, a pointy tip, and a wider head and drive than the former. There are 2 basic types of screw heads: threaded and non-threaded. These have different properties and purposes.
Lead screws are a cost-effective alternative to ball screws, and are used for low power and light to medium-duty applications. They offer some advantages, but are not recommended for continuous power transmission. But lead screws are often quieter and smaller, which make them useful for many applications. Besides, they are often used in a kinematic pair with a nut object. They are also used to position objects.
screwshaft

Function of a screw shaft

When choosing a screw for a linear motion system, there are many factors that should be considered, such as the position of the actuator and the screw and nut selection. Other considerations include the overall length of travel, the fastest move profile, the duty cycle, and the repeatability of the system. As a result, screw technology plays a critical role in the overall performance of a system. Here are the key factors to consider when choosing a screw.
Screws are designed with an external threading that digs out material from a surface or object. Not all screw shafts have complete threading, however. These are known as partially threaded screws. Fully threaded screws feature complete external threading on the shaft and a pointed tip. In addition to their use as fasteners, they can be used to secure and tighten many different types of objects and appliances.
Another factor to consider is axial force. The higher the force, the bigger the screw needs to be. Moreover, screws are similar to columns that are subject to both tension and compression loads. During the compression load, bowing or deflection is not desirable, so the integrity of the screw is important. So, consider the design considerations of your screw shaft and choose accordingly. You can also increase the torque by using different shaft sizes.
Shaft collars are also an important consideration. These are used to secure and position components on the shaft. They also act as stroke limiters and to retain sprocket hubs, bearings, and shaft protectors. They are available in several different styles. In addition to single and double split shaft collars, they can be threaded or set screw. To ensure that a screw collar will fit tightly to the shaft, the cap must not be overtightened.
Screws can be cylindrical or conical and vary in length and diameter. They feature a thread that mates with a complementary helix in the material being screwed into. A self-tapping screw will create a complementary helix during driving, creating a complementary helix that allows the screw to work with the material. A screw head is also an essential part of a screw, providing gripping power and compression to the screw.
A screw’s pitch and lead are also important parameters to consider. The pitch of the screw is the distance between the crests of the threads, which increases mechanical advantage. If the pitch is too small, vibrations will occur. If the pitch is too small, the screw may cause excessive wear and tear on the machine and void its intended purpose. The screw will be useless if it can’t be adjusted. And if it can’t fit a shaft with the required diameter, then it isn’t a good choice.
Despite being the most common type, there are various types of screws that differ in their functions. For example, a machine screw has a round head, while a truss head has a lower-profile dome. An oval-its point screw is a good choice for situations where the screw needs to be adjusted frequently. Another type is a soft nylon tip, which looks like a Half-dog point. It is used to grip textured or curved surfaces.

China OEM OEM SS304 SS316 Non-Standard Hexagon Flange Head Slotted Stainless Steel Self Tapping Screw   with Free Design CustomChina OEM OEM SS304 SS316 Non-Standard Hexagon Flange Head Slotted Stainless Steel Self Tapping Screw   with Free Design Custom

China Standard OEM Non-Standard Long-Axis Machining Hexagon Flange Head Screw for Hardware with Great quality

Product Description

OEM Non-Standard Long-Axis Machining Hexagon Flange Head Screw for Hardware

 

Quotation

According to your drawing(size, material,and required technology, etc)

ToleranceSurface Roughness

+/-0.005 – 0.01mm(Custonize avaiable)Ra0.2 – Ra3.2(Custonize avaiable)

Materials Avaiable

Such as aluminum, copper, stainless steel, iron, PE, PVC, ABS, etc.

Surface Treatment

Polishing, general/hard oxidation/oxidation, surface chamfering, tempering, , etc.

Processing

CNC Turning, Milling, drilling, auto lathe, tapping, bushing, surface treatment, etc.

Testing Equipment

CMM/Tool microscope/multi-joint arm/Automatic height gauge/Manual height gauge/Dial gauge/Roughness measurement

Drawing Formats

PRO/E, Auto CAD, Solid Works , UG, CAD / CAM / CAE, PDF

Our Advantages

1.) 24 hours online service & Quickly Quote/Delivery.

 2.) 100% QC quality inspection before delivery, can provide quality inspection form.
3.) 18+ years of experience in the CNC machining area and have a senior design team to offer perfect modification suggestions.

Product name Custom Cup Head Socket Shoulder Screw
Available Material Carbon steel,alloy steel,stainless steel,brass,aluminium
Industrial process Colding heading,cnc machining ,thread rolling ,cnc lathe,cnc grinding ,wire cuts ects
Heat treatment Tempering,Hardening,Spheroidizing,Stress Relieving
Surface Black oxide oxide,Zinc,clear,nature,ni-plated,tin-plated,chrome plated,passivated,sandblast and anodize,
Tolerance As your requirement.
Application Auto,building ,agriculture, home appliances,solar,furniture,mold,valve ects
Inspection QC+inspection equipment 
Drawing Format Pdf/JPEG/Ai/Psd/CAD/Dwg/Step/Igs/solidwork
Delivery Usually 15-30 days
Grade 4.8,5.6,6.8, 8.8, 10.9, 12.9, A2-70, A480 ects

Inspections:
3D instruments, 2D instruments, Projectors, Height Gauges, Inner diameter dial indicators, Dial gaues, 
Thread and Pin gauges, Digital calipers,Micro calipers, Thickness testers, Hardness testers Roughness 
testers, etc.( Detection accuracy to 0.001 millimetre )

   Packing:
   1: Shrink film+ bulk loading
   2: Shrink film +Carton box + Pallet/ wooden case
   3: PP + Wooden case
   4: As per customers’ requirements or negotiated

       1. High skilled and well-trained working team under good management environment;
       2. Quick response and support for any inquiries;
       3. Over 10 years professional manufacture experience to ensure high quality of your products;
       4. Large and strong production capacity to meet your demand;
       5. High Quality standard and hygienic environment;
       6. We have very strict quality control process: 
       a. In coming Quality control (IQC) – All incoming raw material are checked before used.
       b. In process quality control (IPQC) – Perform inspections during the manufacturing process.
       c. Final quality control (FQC) – All finished goods are inspected according to our quality
       standard for each products. 
       d. Outgoing Quality Control (OQC) – Our QC team will 100% full inspection before it goes
       out for shipment. 
       7. Good after sales services.   
       

        Q: Why choose CZPT product?
        A: We CZPT have our own plant– HangZhou CZPT machinery Co., Ltd, therefore, we can surely
        promise the quality of every product and provide you comparable price.

        Q: Do you provide OEM Service?
        A: Yes, we provide OEM Service.
 
        Q: Do you provide customized forging products?
        A: Yes. Customers give us drawings and specifications, and we will manufact accordingly.

        Q: What is your payment term?
        A: We provide kinds of payment terms such as L/C, T/T, Paypal, Escrow, etc.


Quality First, Price Best, Service Foremost!
We assure you of our best services at all times!

 

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.
screwshaft

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

There are 2 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 2 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 2 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 2 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 6 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 2 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 1 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 2 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 Standard OEM Non-Standard Long-Axis Machining Hexagon Flange Head Screw for Hardware   with Great qualityChina Standard OEM Non-Standard Long-Axis Machining Hexagon Flange Head Screw for Hardware   with Great quality

China Good quality OEM Non-Standard Long-Axis Machining Hexagon Flange Head Screw for Household Accessories wholesaler

Product Description

OEM Non-Standard Long-Axis Machining Hexagon Flange Head Screw for Household Accessories

 

Quotation

According to your drawing(size, material,and required technology, etc)

ToleranceSurface Roughness

+/-0.005 – 0.01mm(Custonize avaiable)Ra0.2 – Ra3.2(Custonize avaiable)

Materials Avaiable

Such as aluminum, copper, stainless steel, iron, PE, PVC, ABS, etc.

Surface Treatment

Polishing, general/hard oxidation/oxidation, surface chamfering, tempering, , etc.

Processing

CNC Turning, Milling, drilling, auto lathe, tapping, bushing, surface treatment, etc.

Testing Equipment

CMM/Tool microscope/multi-joint arm/Automatic height gauge/Manual height gauge/Dial gauge/Roughness measurement

Drawing Formats

PRO/E, Auto CAD, Solid Works , UG, CAD / CAM / CAE, PDF

Our Advantages

1.) 24 hours online service & Quickly Quote/Delivery.

 2.) 100% QC quality inspection before delivery, can provide quality inspection form.
3.) 18+ years of experience in the CNC machining area and have a senior design team to offer perfect modification suggestions.

Product name Custom Cup Head Socket Shoulder Screw
Available Material Carbon steel,alloy steel,stainless steel,brass,aluminium
Industrial process Colding heading,cnc machining ,thread rolling ,cnc lathe,cnc grinding ,wire cuts ects
Heat treatment Tempering,Hardening,Spheroidizing,Stress Relieving
Surface Black oxide oxide,Zinc,clear,nature,ni-plated,tin-plated,chrome plated,passivated,sandblast and anodize,
Tolerance As your requirement.
Application Auto,building ,agriculture, home appliances,solar,furniture,mold,valve ects
Inspection QC+inspection equipment 
Drawing Format Pdf/JPEG/Ai/Psd/CAD/Dwg/Step/Igs/solidwork
Delivery Usually 15-30 days
Grade 4.8,5.6,6.8, 8.8, 10.9, 12.9, A2-70, A480 ects

Inspections:
3D instruments, 2D instruments, Projectors, Height Gauges, Inner diameter dial indicators, Dial gaues, 
Thread and Pin gauges, Digital calipers,Micro calipers, Thickness testers, Hardness testers Roughness 
testers, etc.( Detection accuracy to 0.001 millimetre )

   Packing:
   1: Shrink film+ bulk loading
   2: Shrink film +Carton box + Pallet/ wooden case
   3: PP + Wooden case
   4: As per customers’ requirements or negotiated

       1. High skilled and well-trained working team under good management environment;
       2. Quick response and support for any inquiries;
       3. Over 10 years professional manufacture experience to ensure high quality of your products;
       4. Large and strong production capacity to meet your demand;
       5. High Quality standard and hygienic environment;
       6. We have very strict quality control process: 
       a. In coming Quality control (IQC) – All incoming raw material are checked before used.
       b. In process quality control (IPQC) – Perform inspections during the manufacturing process.
       c. Final quality control (FQC) – All finished goods are inspected according to our quality
       standard for each products. 
       d. Outgoing Quality Control (OQC) – Our QC team will 100% full inspection before it goes
       out for shipment. 
       7. Good after sales services.   
       

        Q: Why choose CZPT product?
        A: We CZPT have our own plant– HangZhou CZPT machinery Co., Ltd, therefore, we can surely
        promise the quality of every product and provide you comparable price.

        Q: Do you provide OEM Service?
        A: Yes, we provide OEM Service.
 
        Q: Do you provide customized forging products?
        A: Yes. Customers give us drawings and specifications, and we will manufact accordingly.

        Q: What is your payment term?
        A: We provide kinds of payment terms such as L/C, T/T, Paypal, Escrow, etc.


Quality First, Price Best, Service Foremost!
We assure you of our best services at all times!

Screw Sizes and Their Uses

Screws have different sizes and features. This article will discuss screw sizes and their uses. There are 2 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 1 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 2 and 16 inches. A screw with a pointy tip has a smaller major diameter than 1 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 1 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.
screwshaft

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 1 thread to the corresponding point on the next thread. Measurement is made from 1 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 1 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.
screwshaft

The lead of a screw shaft

Pitch and lead are 2 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 2 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 2 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 2 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.
screwshaft

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.

China Good quality OEM Non-Standard Long-Axis Machining Hexagon Flange Head Screw for Household Accessories   wholesaler China Good quality OEM Non-Standard Long-Axis Machining Hexagon Flange Head Screw for Household Accessories   wholesaler

China high quality Non-Standard Customized Hexagon Flange Head Slotted Stainless Steel Self Tapping Screw near me factory

Product Description

Non-standard Customized Hexagon Flange Head Slotted Stainless Steel Self Tapping Screw

 

Quotation

According to your drawing(size, material,and required technology, etc)

ToleranceSurface Roughness

+/-0.005 – 0.01mm(Custonize avaiable)Ra0.2 – Ra3.2(Custonize avaiable)

Materials Avaiable

Such as aluminum, copper, stainless steel, iron, PE, PVC, ABS, etc.

Surface Treatment

Polishing, general/hard oxidation/oxidation, surface chamfering, tempering, , etc.

Processing

CNC Turning, Milling, drilling, auto lathe, tapping, bushing, surface treatment, etc.

Testing Equipment

CMM/Tool microscope/multi-joint arm/Automatic height gauge/Manual height gauge/Dial gauge/Roughness measurement

Drawing Formats

PRO/E, Auto CAD, Solid Works , UG, CAD / CAM / CAE, PDF

Our Advantages

1.) 24 hours online service & Quickly Quote/Delivery.

 2.) 100% QC quality inspection before delivery, can provide quality inspection form.
3.) 18+ years of experience in the CNC machining area and have a senior design team to offer perfect modification suggestions.

Product name Custom Cup Head Socket Shoulder Screw
Available Material Carbon steel,alloy steel,stainless steel,brass,aluminium
Industrial process Colding heading,cnc machining ,thread rolling ,cnc lathe,cnc grinding ,wire cuts ects
Heat treatment Tempering,Hardening,Spheroidizing,Stress Relieving
Surface Black oxide oxide,Zinc,clear,nature,ni-plated,tin-plated,chrome plated,passivated,sandblast and anodize,
Tolerance As your requirement.
Application Auto,building ,agriculture, home appliances,solar,furniture,mold,valve ects
Inspection QC+inspection equipment 
Drawing Format Pdf/JPEG/Ai/Psd/CAD/Dwg/Step/Igs/solidwork
Delivery Usually 15-30 days
Grade 4.8,5.6,6.8, 8.8, 10.9, 12.9, A2-70, A480 ects

Inspections:
3D instruments, 2D instruments, Projectors, Height Gauges, Inner diameter dial indicators, Dial gaues, 
Thread and Pin gauges, Digital calipers,Micro calipers, Thickness testers, Hardness testers Roughness 
testers, etc.( Detection accuracy to 0.001 millimetre )

   Packing:
   1: Shrink film+ bulk loading
   2: Shrink film +Carton box + Pallet/ wooden case
   3: PP + Wooden case
   4: As per customers’ requirements or negotiated

       1. High skilled and well-trained working team under good management environment;
       2. Quick response and support for any inquiries;
       3. Over 10 years professional manufacture experience to ensure high quality of your products;
       4. Large and strong production capacity to meet your demand;
       5. High Quality standard and hygienic environment;
       6. We have very strict quality control process: 
       a. In coming Quality control (IQC) – All incoming raw material are checked before used.
       b. In process quality control (IPQC) – Perform inspections during the manufacturing process.
       c. Final quality control (FQC) – All finished goods are inspected according to our quality
       standard for each products. 
       d. Outgoing Quality Control (OQC) – Our QC team will 100% full inspection before it goes
       out for shipment. 
       7. Good after sales services.   
       

        Q: Why choose CZPT product?
        A: We CZPT have our own plant– HangZhou CZPT machinery Co., Ltd, therefore, we can surely
        promise the quality of every product and provide you comparable price.

        Q: Do you provide OEM Service?
        A: Yes, we provide OEM Service.
 
        Q: Do you provide customized forging products?
        A: Yes. Customers give us drawings and specifications, and we will manufact accordingly.

        Q: What is your payment term?
        A: We provide kinds of payment terms such as L/C, T/T, Paypal, Escrow, etc.


Quality First, Price Best, Service Foremost!
We assure you of our best services at all times!

Screw Sizes and Their Uses

Screws have different sizes and features. This article will discuss screw sizes and their uses. There are 2 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 1 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 2 and 16 inches. A screw with a pointy tip has a smaller major diameter than 1 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 1 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.
screwshaft

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 1 thread to the corresponding point on the next thread. Measurement is made from 1 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 1 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.
screwshaft

The lead of a screw shaft

Pitch and lead are 2 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 2 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 2 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 2 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.
screwshaft

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.

China high quality Non-Standard Customized Hexagon Flange Head Slotted Stainless Steel Self Tapping Screw   near me factory China high quality Non-Standard Customized Hexagon Flange Head Slotted Stainless Steel Self Tapping Screw   near me factory