Product Description:

The 1MS160D-4B-A1/S010 is a stator subassembly produced by Bosch Rexroth Indramat for the 1MB High-Speed Asynchronous Motors series. As the stationary half of a frameless spindle motor, it generates the rotating magnetic field that drives the rotor once it is energized by an external inverter. Machine tool builders integrate this stator into compact, high-speed spindles so that drilling, milling, or grinding heads achieve precise speed regulation and high power density within automated machining centers.

Thermal management is supplied by its liquid cooling circuit, enabling heat to be removed directly from the winding package for continuous high-speed duty. The unit aligns with frame size 160, placing its stator outside diameter in the mid-range of the series and simplifying mechanical interchangeability with common spindle housings. Inside that envelope, the motor length code D indicates an extended active stack that raises torque without enlarging the frame. Electrical output characteristics derive from the chosen winding variant 4B, a set of coil turns and conductor dimensions that determine rated current and base frequency. Surrounding these windings is an aluminum cooling jacket that provides a conductive path for coolant while also minimizing weight.

Integration with drive electronics is flexible because the stator is suitable for third-party drives, allowing OEMs to match it with existing inverter platforms. Power and sensor leads exit through the stator end as a 1.5 m loom, reducing cabinet wiring inside the spindle housing. To monitor operating temperature, the laminated core carries NTC resistors, PTC resistors, and bimetals, giving analog and trip-level feedback channels that protect the insulation system. As a stator for a 1MB frameless spindle motor, the component is delivered without a bearing set or rotor, so machine builders can align their own shaft modules while still using the factory-balanced magnetic assembly.