Cylindrical Dowel Pin

The cylindrical dowel pin is a type of locator pin used to fix the relative position between parts. It is an important component during assembly and machining. They are typically held in place by an interference fit in the hole of the pin, ensuring precise positioning.

To improve the stability and reliability of positioning, they are often used in pairs, the length of the dowel pin is usually about 1 to 2 times its smallest diameter, ensuring it fits securely in the hole of the pin and can handle some load.

In assembly applications, cylindrical dowel pins also serve as important connectors. They act as bridges between parts, securing the connection. Stainless steel dowel pins, known for their high strength, can handle significant forces. With high surface hardness, these pins resist wear and scratches effectively. They also show excellent resistance to corrosion in acidic, alkaline, and saline environments.

With high strength, cylindrical dowel pins are widely used in critical applications like aerospace engines. They are also crucial in automotive manufacturing, such as in engine blocks, and gearboxes. They are also commonly used in structures like bridges, high-rise buildings, and subways to improve safety and extend the life of the infrastructure.

Product Features and Benefits

High-Precision Manufacturing

Zeyao uses CNC machining equipment to ensure diameter tolerances and coaxiality meet international standards.

The diameter tolerance of the cylindrical pin can be controlled to ±0.005mm, ensuring precise positioning during assembly.

High-Quality Material Selection

A variety of materials are available: stainless steel (SUS304/316), carbon steel, alloy steel, copper, titanium alloy, and more.

All materials undergo rigorous testing and possess excellent wear and corrosion resistance, making them suitable for high-intensity, high-temperature, humid, and chemical environments.

Surface Treatment

A variety of surface treatment options are available: galvanizing, blackening, polishing, nickel plating, chrome plating, and passivation.

These treatments effectively enhance rust resistance and appearance, extending service life.

Stable Structure and Secure Assembly

A high-intensity heat treatment process ensures the cylindrical pins have excellent hardness and shear resistance.

No burrs or deformation, ensuring smoother installation and easier removal.

Raw Material

Cold Forging

Threading

Auto Lathe

Auto Lathe

Table Lathe

CNC Lathe

Quality Checking

Inspection

Packing

1. Raw Material

We purchase high-quality metal wire and strictly sort it into batches upon arrival, preparing it for subsequent processing.

2. Cold Heading

A cold heading machine processes the raw material into the basic shape of the fastener.

3. Thread Rolling

Next, threading, also known as threading, is performed to ensure the screw or bolt has a standard, clear profile.

4. Automatic Lathe Processing

Fully automatic lathes are used to further refine parts, including chamfering, turning, and slotting, to enhance dimensional accuracy.

5. Benchtop and CNC Lathe Finishing

For complex or customized fasteners, we use benchtop lathes and CNC machines for further processing to ensure they meet specific customer requirements.

6. Quality Inspection

All products undergo rigorous manual and automated inspections to eliminate defective items and ensure that every shipment meets customer standards.

7. Functional Testing

Some products undergo specialized testing equipment to verify key indicators such as hardness, thread accuracy, and external dimensions.

8. Packaging and Shipping

Products are sorted, packaged, labeled, and boxed automatically or manually, and then neatly stacked in the warehouse for shipment.

Why Choose Zeyao?

19 Years of Fastener Manufacturing Experience

With nearly two decades of experience in the industry, we are familiar with the manufacturing standards and technical requirements for all types of cylindrical pins.

Over 160 Advanced Production Equipment

Fully automatic turning, tapping, grinding, and testing equipment ensure the dimensional accuracy of every product.

Monthly production exceeds 10 million pieces

Sufficient production capacity ensures on-time delivery of large-volume orders.

OEM/ODM Customization Available

We offer flexible customization services, from material selection and precision control to packaging design.

Strict Quality Control System

Every batch of products undergoes dimensional, hardness, and corrosion resistance testing to ensure high quality from the moment they leave the factory.

Extensive Export Experience

Our products are exported to Europe, America, Southeast Asia, the Middle East, and other regions, earning the trust of international customers.