Product Description:

The 1MS241H-6D-A1/S010 stator is manufactured by Bosch Rexroth Indramat as part of the 1MB High-Speed Asynchronous Motors series. It is supplied without a housing so that machine builders can integrate the magnetic assembly directly into a spindle shaft, forming the stationary field system of a frameless motor. When combined with a matching rotor, this component provides the torque-generating element required for high-speed cutting, grinding, or drilling axes in automated production lines where compact envelopes and reduced rotating mass are critical.

A frame diameter of 241 mm establishes the outside size of the laminated core, giving sufficient pole area for medium to large spindle bores. The motor length code H identifies an extended axial stack, increasing the active iron and copper length for higher continuous output. Thermal management relies on liquid cooling, and coolant circulates around the stator to extract losses generated by high switching frequencies. Heat is transferred through an aluminum cooling jacket, which is a lightweight shell bonded to the lamination stack that conducts energy to the coolant channel. Electrical behavior is set by the winding system labeled 6D, which sets conductor cross-section, impedance, and electromotive constants so the stator meets designated voltage and speed points.

A preinstalled 1.5 m loom exits through the non-drive end, simplifying connection to the drive controller cabinet without additional field wiring. The design is suitable for third-party drives, giving users flexibility when pairing the stator with different inverter platforms. Embedded thermal sensors, including NTC resistors, PTC resistors and bimetals, monitor winding temperature and trigger protective logic before insulation limits are surpassed. Functionally, the assembly is a stator for a 1MB frameless spindle motor, enabling direct-drive spindles that deliver high surface finish quality and precise speed regulation in CNC machining centers.