Splines

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Shaft and -hub with involute ,
square teeth and splines (left to right)

A spline (also known as a spline) is a possible shape in a shaft-hub connection . It is a multiple driver connection, whereby the torque is transmitted by the tooth flanks . The shaft is external and the hub internal.

Because the connection is not statically determined , a high level of manufacturing accuracy is required so that as many flanks as possible (with small elastic deformations ) are involved in the transmission. The two parts can basically be moved axially against each other, which is used in many applications, for example with power take-offs that often have to be assembled and disassembled.

Types of splines

  • Splines with involute flanks : The toothed part of the shaft is a very wide gear with involute teeth.
    Standards: DIN 5480, DIN 5482 (withdrawn), ISO 4156, ANSI B92.1
  • Splines with wedge flanks : The two flanks of a tooth are parallel planes.
    Standards: ISO 14, DIN 5461 to 5463 (withdrawn), DIN 5464
  • Splines with notched flanks : The two flat flanks of a tooth are not parallel. The teeth are pointed.
    Standards: DIN 5481

See also