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Production of cotter and cotter pins

A cotter pin is a metal fastener with two tines that are bent during installation, similar to a style or rivet once inserted, the two ends of the pin are best apart locking it in place. In order to facilitate the initial separation of the tines, one tine of the cotter pin is often noticeably longer than the other. Cotters and cotter pins are widely used to fix bicycle pedal creaks to their shifts and to secure some other fasteners.

Raw material

Mild steel wire is the major raw material for the manufacture of cotter and cotter pin

The mild steel rod is straightened and cut to the size on machine. It is turned on lather and a groove made on milling machine. There after it is threaded at one end on thread

rolling machine and finally nickel plated. For these nuts, the boa is first fed to the nut cutting machine and threads made on automatic tapping machine. These are also nickel plated after inspection. The other version of cotter pin which is a metal with two times that are bent during installation is made as per the following production process. The steel wire with half circular cross section is straightened and cut to the size and then fed to the bending section and forming section to make the head of the pin according to the different applications. Finally, after inspection and nickel plated, ready for dispatch.
The technological process has no any adverse environmental impact.

Machinery and Equipment

  • Bar straightening & cutting
  • Automatic nut cutting
  • Lathe machine
  • Automatic nut tapping
  • Milling machine
  • Bending & forming machine
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