Product Description:

The 1MS241D-6C-A2 is a stator element manufactured by Bosch Rexroth Indramat for spindle drives and other high-speed automation assemblies. As the stationary half of a frameless motor set, the stator generates the rotating magnetic field that couples with a separate rotor to deliver torque and speed regulation in compact machine tool spindles and similar equipment. It is supplied as a Stator for 1MB Frameless Spindle Motor, so it mates with compatible rotors and sensor components from the same platform. Because the unit is frameless, it is intended to be integrated directly into the surrounding machine structure rather than used as a complete standalone motor.

The stator is cooled by a closed circuit of liquid cooling, which helps keep winding temperature within permissible limits at high power density and supports consistent thermal performance during sustained spindle operation. A pre-installed 1.5 m loom exits through the non-drive end, giving the builder a ready-terminated power interface and simplifying cable routing away from rotating components. Frame size 241 sets the outside diameter and mounting pitch so matching rotors can be paired without shimming. Length code D indicates the axial stack height of the laminated core, which affects the continuous output power of the assembled spindle. Winding variant 6C sets the rated voltage, current, and base frequency required from the drive controller.

An integral aluminum cooling jacket surrounds the lamination stack to promote even heat transfer to the coolant and eliminate external fan noise. By placing the cooling path around the active core, the housing removes heat close to the area where electrical losses are generated. This layout is useful in compact spindle packages where space around the motor is limited and external airflow hardware is undesirable. The unit uses the same platform geometry for compatible rotor and sensor combinations, allowing changes in length or winding code without altering mounting points or cooling circuits.