Product Description:

The 1MS160H-4A-A1/S010 stator is produced by Bosch Rexroth Indramat and belongs to the 1MB High-Speed Asynchronous Motors series. As the stationary half of a frameless spindle motor, it generates the rotating magnetic field that couples with a separate rotor to drive high-speed machine-tool spindles. Integrators mount this open stator directly into custom housings where space is limited and operating temperatures are tightly controlled. In automated machining centers, the unit provides the electromagnetic torque source while liquid coolant removes Joule heat so that tool speed, cut quality, and cycle time stay consistent during long production shifts.

Cooling uses liquid cooling, a closed circuit that holds winding copper below critical temperature even at top spindle speed. The stator follows the 160 frame size, giving an outside diameter that matches standard 1MB housings and simplifies integration. Length designation H indicates an extended core stack that raises continuous power density without altering flange dimensions. Electrical characteristics are set by winding variant 4A, so the induced voltage, current, and torque constants align with 1MB drive tables. The stator is suitable for third-party drives, so it can be paired with non-Rexroth inverters when the ratings match.

The delivery set includes a 1.5 m loom that exits on the non-drive end of the stator to reduce enclosure depth and minimize electromagnetic interference between power phases. An aluminum cooling jacket is bonded to the lamination stack, and its high thermal conductivity promotes uniform temperature distribution while limiting hot spots during prolonged high-speed cutting. For temperature monitoring, the windings carry NTC resistors, PTC resistors, and bimetals, enabling staged derating or emergency shutdown before insulation limits are reached.