Product Description:

The 1MS375D-6D-A1/S010 stator is produced by Bosch Rexroth Indramat as part of the 1MB High-Speed Asynchronous Motors series. It forms the stationary portion of a frameless spindle motor assembly and serves as the electromagnetic core that generates the rotating field for high-speed machine tool spindles and other precision drives in industrial automation. Designed as a separate stator module, it permits integration with compatible rotors, allowing machine builders to tailor spindle dimensions while relying on a standardized magnetic package. This arrangement is useful in high-speed spindle systems where the motor package must fit closely around bearing sets, cooling passages, and the machine nose geometry.

The stator employs liquid cooling, which circulates through an aluminum jacket to extract copper losses during continuous high-speed operation. Within the 1MB range, its frame size is 375, giving a large winding window for higher power density. A factory-installed 1.5 m loom exits at the stator end and provides pre-terminated power leads that simplify routing inside the spindle housing. This helps reduce the amount of internal cable preparation required in compact spindle cavities. For electromagnetic behavior, the winding variant is coded 6D, which sets slot fill, turns count, and voltage constant so the stator can be connected to compatible third-party drives without requiring nonstandard parameter changes. Thermal supervision is handled by integrated NTC resistors and PTC resistors, enabling drive controllers to limit current or trigger shutdown before the insulation system reaches critical temperatures.

The length code D indicates an active stack that balances axial space with torque output, making the unit suitable for medium-length spindles where thermal capacity is enhanced by the aluminum cooling jacket. A set of embedded bimetals provides an additional mechanical temperature trip independent of the electronic sensors, offering backup protection when the stator operates on converters from various vendors. That format also gives machine builders flexibility when matching the magnetic section to the surrounding shaft, housing, and bearing layout.