Product Description:

The 1MS376A-QB-A2/S010 is manufactured by Bosch Rexroth Indramat and belongs to the 1MB High-Speed Asynchronous Motors series. This stator module is pressed directly into the spindle housing and pairs with a separate rotor to form the electromagnetic core of high-speed machining spindles used in CNC milling, grinding, and drilling systems. By generating a rotating magnetic field inside the work head, the component supplies the torque density and acceleration needed for precise metal-cutting operations while keeping the overall spindle diameter compact for automated production lines.

Thermal control is managed through liquid cooling, and the flow path is molded into an aluminum cooling jacket that surrounds the lamination stack to keep winding temperatures within permissible limits during sustained high-speed cuts. Power enters through a pre-terminated 1.5 m loom that exits the stator end, simplifying routing through the spindle shaft bore and reducing installation time. Mechanical sizing follows motor length code A, so torque and thermal ratings match other A-length members of the family. Temperature feedback is immediate because the winding bundle carries integrated NTC resistors, enabling the connected drive to react before insulation limits are reached.

Interface flexibility is provided by the unit's designation as suitable for third-party drives, letting machine builders couple the stator to non-Bosch Rexroth inverters without custom firmware. As a stator for a 1MB frameless spindle motor, it uses mounting shoulders, pilot diameters, and rotor air gaps that follow the platform's geometric standard in multi-spindle cells. Complementary thermal safeguards include embedded PTC resistors for rapid over-temperature trips and discrete bimetals that open at fixed thresholds, so redundant protection remains even if sensor wiring or control electronics fail.