a shaft body; and

a current transmission module, wherein:

the shaft body has a tubular open end which is directed toward the current transmission module and forms a receptacle,

a shaft body-side end of the current transmission module is received in the receptacle in a positively locking manner,

the current transmission module comprises a main body which is made from a first material and on which electric contact elements which are made from a second material are provided,

the electric contact elements comprise first conductor tracks which run in contact channels which are provided in an interior of the main body,

the contact channels are connected in an electrically conducting manner to contact points which are arranged on an outer circumferential side of the main body,

cooling fluid channels are provided in the current transmission module, and the cooling fluid channels emanate from the shaft body-side end, open on a circumferential face of the current transmission module, and are connected fluidically to an interior space of the shaft body,

the cooling fluid channels are provided in a main body of the current transmission module, and

the cooling fluid channels are arranged offset in a circumferential direction with respect to the contact channels.