Serration
A spline is a type of positive shaft-hub connections for transmitting torques. The tapered teeth of the shaft engage with those of the hub. The design of the shafts and hubs is regulated in DIN 5481 and ISO 4156.
application
The serration is a special type of spline and is used to connect shafts and hubs. In contrast to the spline connection, however, this connection cannot be moved axially for reasons of wear. One advantage over the parallel key connection is that the shaft and hub are less weakened in terms of their diameters. However, only small torques can be transmitted because the tooth root load-bearing capacity is low due to the small teeth.
The centering of the shaft and hub takes place via the tooth flanks.
Manufacturing
According to DIN 5481, the teeth of the shafts have a constant gap angle of 60 °. The gap angle of the teeth of the hub depends on the number of teeth.
The shaft can be produced by rolling , profile milling or hobbing . The hub is mostly manufactured by broaching or shaping . The profiles of the flanks are straight or involute . In particular, the hobbing of the shaft creates involutes.
See also
literature
- G. Niemann, H. Winter, B.-R. Höhn: machine elements . Volume 1: Design and calculation of connections, bearings, shafts. 4th edition. Springer-Verlag , Berlin Heidelberg 2005, ISBN 3-540-25125-1 .
- Splines with notched flanks , DIN 5481: 2013-08 - draft, Beuth Verlag 2013