Motor spindle

A motor spindle comprises:

• a stator unit, which comprises a stator sleeve of a stator housing and at least one motor having a rotatable rotor that has at least one rotatable housing element, a rotor unit, a first electromagnetic drive system, which is arranged in the stator sleeve of the stator housing, and a second electromagnetic drive system having drive coils of a stator and permanent magnets of the rotatable rotor, the rotor unit is rotatable about a rotation axis and which has at least one rotor shaft and a tool receiver having a collect for receiving a machining tool, wherein at least one bearing unit is provided for rotatably supporting the rotor unit in the stator unit, wherein the tool receiver is arranged at an end point of the rotor unit such that a front end face of the tool receiver is a foremost end of a front face of the motor spindle, wherein a front portion of the stator housing is arranged to be adjacent to the tool receiver, wherein the second electromagnetic drive system, which has the drive coils of the stator and the permanent magnets of the rotatable rotor, is arranged in the front portion of the stator housing such that both the drive coils of the stator and the permanent magnets of the rotatable rotor of the second electromagnetic drive system are arranged radially adjacent to the tool receiver, wherein the at least one rotatable housing element is arranged on a front end portion of the rotatable rotor, such that the at least one rotatable housing element is configured to be driven about the rotation axis with respect to the front end face of the tool receiver by the rotatable rotor via the at least one motor at least one of independently and separately from the rotor unit.