Product Description:

The 1MS241D-6C-A1/S010 is a stator assembly produced by Bosch Rexroth Indramat for the 1MB High-Speed Asynchronous Motors series. As the stationary portion of a frameless spindle motor, it generates the electromagnetic field that acts on the matching rotor during high-speed rotation. This arrangement is used in machining centers and other automated equipment where the motor is built directly into the spindle structure rather than housed in a separate external frame. Installed inside a custom spindle housing, the stator supports compact machine layouts and high peripheral speed capability without requiring a fully enclosed motor module.

The stator has a frame outside diameter of 241, and the active stack depth follows the D length code. The winding set uses variant 6C, which sets the number of turns and conductor cross-section for voltage and current values used in high-speed inverter operation. Continuous heat is removed by liquid cooling, and the stator body uses an aluminum cooling jacket that routes coolant around the laminations. This cooling method helps keep copper temperature under control during sustained spindle operation and supports stable thermal behavior in compact housings.

Electrical connection is supplied through a 1.5 m loom that exits the stator end, which avoids the need for an additional terminal box when the motor is installed in a tight spindle bore. The winding is suitable for third-party drives, so the stator can be paired with inverters from multiple vendors when system requirements call for external drive selection flexibility. Internal protection is handled by NTC resistors, PTC resistors, and bimetals, which provide temperature monitoring and can interrupt the circuit if overheating occurs. These protective elements help the spindle system respond to abnormal thermal conditions before insulation damage develops.