In a component for connecting a shaft to a clamping holder that can receive a rotor, the clamping holder is able to be inserted into a cup-shaped housing and is able to be fixed there by fasteners. On the housing base of the housing is a connector for connecting the housing to the shaft in a torque-proof manner. The fasteners are arranged with their base surface on the outer lateral surface of the housing, and can be brought into engagement with the clamping holder by bores present in the housing. The fasteners have at least one recess in the base surface, such that they rest with their base surface on the outer lateral surface only in some regions.

In a component for receiving and clamping a rotor, a ring assembly enclosing a hollow space includes rings lying one inside the other and with connectors extending radially through the ring assembly, by which the rings are connected to one another in a rotationally fixed manner. At least two clamping elements projecting into the hollow space are attached to the ring assembly, which form a receptacle for the rotor with clamping surfaces. There are also weights on the ring assembly for centrifugal force compensation.