Taper pin

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Cylindrical pin (Fig. 1) and plug pin (Fig. 2)

A taper pin is a conical pin that is used as a connecting element in mechanical engineering . Pressing into a tapered bore creates a frictional connection that can be released again.

In Germany, on March 1, 1918, the conical pin received the first DIN standard , DIN 1, from the standards committee of German industry (today the German Institute for Standardization ) . This standard was withdrawn in 1992 and replaced by the European standard EN 22339.

Tapered pins belong to the standard part type pins . According to the standard DIN 1 is a taper pin which has taper ratio or on adjacent picture based (Fig. 2) .


Logo of the German Institute for Standardization DIN EN 22339
Area Fasteners
title Conical pins, unhardened
Brief description: The document contains the relevant specifications and technical delivery conditions for tapered pins, unhardened, and specifies their designation.
Latest edition 1992-10
ISO ISO 2339: 1986

The following standards exist for taper pins:

  • DIN 1 / EN 22339 / ISO 2339 taper pins, unhardened
  • DIN 257 taper pins; with threaded pin; Whitworth thread 1/4 ″ to 1½ ″
  • DIN 258 taper pins with threaded pin and constant taper lengths
  • DIN 7977 / EN 28737 / ISO 8737 taper pins with threaded pin and constant thread pin length
  • DIN 7978 / EN 28736 / ISO 8736 tapered pins with internal thread , unhardened

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