What are dowel pins used for?

The dowel pin is mainly used between the screws fastened between the two parts to ensure the accuracy of the position. It is mainly used for assembly positioning, and can also be used as overload shear connection in connection and relaxation level safety devices. The basic form is cylindrical pin and tapered pin. Dowel pins are also called positioning pins.

Let's learn the main functions and uses of dowel pins：

First dowel pins are divided into cylindrical dowel pins and tapered dowel pins.

1.Cylindrical dowel pins(picture1 and 2)

2. Tapered dowel pins（picture3 and 4）

The difference between them is:

1. Different processing. Cylindrical dowel pins can be pre-processed, and tapered dowel pins are usually matched.

2. Cylindrical dowel pins are often suitable for precise positioning (processing first), and tapered dowel pins are often used for frequent disassembly.

3. Cylindrical dowel pins can play a role of anti-shearing, tapered dowel pins are often used for positioning.

Cylindrical dowel pins are fixed in the reamed hole with small interference, which can bear a small load. In order to ensure the positioning accuracy and the tightness of the connection, it should not be disassembled frequently. It is mainly used for positioning and also used as a coupling pin and a safety pin.

The tapered dowel pin has good self-locking performance, high positioning accuracy, convenient installation, and multiple assembly and disassembly have little influence on the positioning accuracy. It is mainly used for positioning and can also be used as a connecting pin. The pin hole needs to be reamed.

Material selection for dowel pins:

If the workpiece needs to be clamped repeatedly during use, the fixed pin should have good wear resistance, and a better material should be selected, such as 20#steel or 45#steel, with surface carburizing and quenching. The material can also be selected according to actual usage.

Commonly used materials are generally: stainless steel 303/304/316, Q235, 20# steel, 45# steel,  brass,ect.

Customization is accepted, please feel free to send drawings to inquire at any time, thank you!