Product Description:

The 1MS200E-4B-A1/S010 stator is manufactured by Bosch Rexroth Indramat and belongs to the 1MB High-Speed Asynchronous Motors series. Within a frameless spindle assembly, it provides the stationary magnetic field required to drive the rotor at high repetition rates used in milling, drilling, or grinding centers. By supplying this stator as a separate component, machine builders can integrate high-speed spindle technology directly into custom housings and optimize the mechanical envelope of their automation cells.

Thermal control is achieved through liquid cooling, which circulates through the stator jacket and keeps copper temperatures below critical values during continuous duty cycles. That jacket is machined from aluminum, and the stator uses an aluminum cooling jacket that adds structural stiffness while forming the coolant path around the lamination core. Electromagnetic characteristics follow winding variant 4B; this winding corresponds to resistance, inductance, and base-frequency values that allow speed to exceed conventional motor limits when paired with high-frequency inverters. The outer geometry complies with frame size 200, allowing direct insertion into mounting bores standardized across the 1MB family. To safeguard the windings, NTC resistors, PTC resistors, and bimetals are embedded, providing analog and discrete temperature feedback for controlled shutdown or derating.

Electrical connection is pre-terminated with a 1.5 m loom that exits through the non-drive end of the stator, reducing assembly time and maintaining consistent lead dress inside the spindle housing. The axial stack length identified by motor length code E yields a torque-to-length ratio suited for mid-power spindles, allowing adequate cutting torque without expanding the machine's headstock. The unit is a stator for a 1MB frameless spindle motor. It mates with corresponding rotors and bearings and remains suitable for third-party drives, enabling integration with a range of commercial inverter platforms when proprietary Rexroth controls are not selected.