Product Description

Quick details:
Qida specializes in precision machining of various material components for a wide range of applications, including:
Automation/Robotics
Aerospace Applications/Defense
Auto parts, 3C automation equipment,
aerospace, engineering machinery,
Hardware processing of precision parts and accessories in medical, food, new energy battery equipment, instrumentation, precision instruments, hardware tools and other industries
QI da uses automation, technology and innovative manufacturing techniques to produce high quality products, delivered on time and at the lowest achievable cost.
These key factors will help you reduce operating costs and expand your competitive advantage in today’s rapidly changing marketplace. equipment:

Processing materials can be used to manufacture parts made of various alloys, including aluminum, steel, copper, brass, titanium, stainless steel, 304.303.316L, carbon steel, D2 steel, POM, PC, ABS, PVC ,PPEand other plastics.
Metal processing: CNC turning, milling, drilling, planing, grinding, welding…
Finish: Galvanized (No Cr3 RoHS or Cr6), Chrome/Nickel, Hot Dip Galvanized, Painted, Anodized, Powder Coated, Brushed, Polished
Qi da offers CNC machining and many auxiliary operations, we can now provide a one-stop solution for your engineering requirements. Machining often requires a second operation such as heat treatment, assembly, anodizing, painting, chemical blackening, laser cutting. By using our own machines and approved suppliers, all of this can now be done under 1 roof, saving the buyer a lot of time in filing separate purchase orders for individual jobs.
CNC milling, CNC turning, laser cutting to surface grinding, you can order the combination to suit your requirements.
Company Profile

workshop

The company has set up a special technology research and development department, and has an experienced and innovative technology research and development team. Provide professional services such as drawings, design, production samples, assembly and debugging for all customers. What makes CZPT different, Machining Company is Qida, the label of excellent quality and high efficiency. Over the years, we have introduced a lot of high-tech equipment, such as four-axis CNC machining centers, which allow us to manufacture complex micro-machine precision parts faster than ever before.

Testing Equipment

1. Are you a direct manufacturer?
Yes, we are direct manufacturer. We have been in this domain since 2008. And if you want, we could chatting with you on video via Wechat/ Whatsapp/Messenger and any way you like to show you our plant.
2. How can you guarantee quality?
Always a pre-production sample before mass production;Always final Inspection before shipment;ALWAYS full-inspection we have.
3. What kind of service/products you provide? 
1. Service of ODM&OEM/one -stop service/assembly; From mold design, mold making, machining, fabrication, welding, surface treatment, assembly, packing to shipping. 
2. Automotive parts, bicycle parts, motorcycle parts, scooter parts, racing parts, audio products, medical equipment parts, electronic instruments parts, kitchen and bathroom products and other hardware parts. 
3. Iron/stainless steel/aluminum/titanium/brass/bronze/steel alloys/hardened parts/any kind of precision parts you need. 
4. Automatic lathe turning parts, milling parts, bending parts, welding parts, stamping parts. All kinds of hardware could be customized here, your precious contact is much welcomed!
4. Why should we buy from you not from other suppliers? 

(1). We have own plant and 80% of staff(especially the technical staff) in our company have experience for over 20 years. 

(2). We provide a competitive price. 

(3). High precision, tolerance can be within + 0.005 

(4). 10 years’ fabrication experience. 

(5). Small order also is welcomed. M100 

(6). We can also provide one-stop service, including mold and assembly. 

(7). All your information is confidential, and we can sign NDA as well.

5. How can I close my deal with you? 
This is easy. Firstly, contact our consultant. our consultant will response you within 10 minutes. Secondly, you can provide drawings and the specification about your custom products to us. Thirdly, confirm the contract and pay, and we will start production. we will choose the best mode of transportation for you.
6.Are you available for customized design drawings?
Yes, DWG, DXF, DXW, IGES, STEP, PDF etc.
7. What’s the MOQ? 
In general 100pcs, but can accept low quantity in special conditions.
8.What’s the leading time?
It depends on quantity, generally 7-20 days after order confirmation.
9. Can we know the production process without visiting the factory? 
We will offer detailed production schedule and send weekly reports with digital pictures and videos which show the machining progress.

 

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 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.

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.

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.