A locking assembly is an interference-fit shaft – hub joint which connects the hub of a sprocket, for example, and a shaft to allow a torque to be transmitted between the two of them. It also secures the hub against axial movement on the shaft.
There are different types of locking assemblies. Most of them consist of two annular spring rings which are pushed onto each other via conical surfaces. The locking assembly has cylindrical inner and outer surfaces and is inserted in the hub’s bore or mounted on the shaft with a little play. The conical surfaces of the inner and outer ring can be drawn together for locking by several screws that are arranged in an axial direction.