In machinery, pins are mainly used for assembly positioning and also as overload shear connections in connection and relaxation level safety devices.   The types of pins are: cylinder pin, cone pin, pin with hole, cotter pin and safety pin.

The basic forms of pins are cylindrical pins and cone pins.   The cylindrical pin is fixed in the pin hole using a little interference.   Multiple assembly and disassembly will reduce positioning accuracy.   Cone PIN HAS a taper of 1:50, can be self-locking, by cone extrusion action fixed in the pin hole, high positioning accuracy, installation is also convenient, can be repeatedly assembled and disassembled.