Product Description:

The 1MS160N-4A-A1/S010 is a stator subassembly supplied by Bosch Rexroth Indramat for the 1MB High-Speed Asynchronous Motors series. As the stationary portion of a frameless spindle motor, it houses the windings that create the rotating field once energized. When paired with a matching rotor and drive, the unit converts electrical energy into high-speed motion required for machining centers and other precision automation modules. Its frameless format allows direct integration into machine housings, reducing overall envelope size while maintaining the thermal performance expected in continuous-duty spindles.

Electrical interface flexibility is emphasized by compatibility with third-party drives, allowing the stator to operate with inverters beyond standard Rexroth drive systems. Power conductors exit through the stator end inside a prewired loom measured at 1.5 m, so cabinet connections can be completed without additional extensions. Heat produced by copper losses is removed through liquid cooling, a closed circuit that circulates coolant around the laminated core. The active iron belongs to frame size 160, giving the stator a 160 mm outside diameter, and it is built with an aluminum cooling jacket to improve thermal transfer during prolonged full-speed cycles.

The mechanical geometry follows length code N, offering an axial dimension that balances torque output and installation depth. Electromagnetic characteristics stem from winding variant 4A, a coil design selected for high-frequency spindle operation. Embedded safety and monitoring elements include NTC resistors for continuous temperature feedback and PTC resistors that trigger protective cutoffs during overload. A set of bimetals provides an independent thermal trip if winding temperature rises beyond the normal operating range.