Product Description:

The MSS201C-110-A1N-NN stator is supplied by Bosch Rexroth Indramat for the MSS Synchronous IndraDyn H Motors series. As a stator for a synchronous kit spindle motor, the open-frame unit is pressed directly into a spindle housing, where it produces a rotating magnetic field for high-speed machining or grinding centers. By eliminating external couplings, the assembly supports compact, dynamically balanced spindles and provides the accurate torque response required in industrial automation cells that use electronically commutated drives for contouring, drilling, or micromilling tasks.

The magnetic circuit is designed for an axial attractive force of 400 N and a radial pull of 444 N; these loads must be absorbed by the spindle bearings during full-current excitation. A connection strand with a diameter of 22 mm routes the three-phase power conductors, and each phase has a copper cross-sectional area of 16.0 mm², allowing low resistive loss at the high RMS currents found in high-speed spindles. Two designated ground connection sides simplify grounding inside symmetrical housings, while the electrical interface uses a molded connection cable that mates with the machine harness. Because the motor has an open design, the stator has an IP00 protection rating, so the spindle housing must provide sealing and coolant isolation.

The liquid channels integrated into the lamination stack accept coolant at pressures up to 6 bar, enabling close control of winding temperature within the permissible ambient range of 0 to +40 °C. Thermal feedback is supplied by a pair of KTY84-130 platinum sensors, and their lead set has a cross-sectional area of 0.25 mm². An SNM150.DK switch provides additional overtemperature protection and is wired with conductors that have a cross-sectional area of 0.5 mm². These devices report temperature conditions to the drive so it can limit current before the Class F insulation system reaches its thermal limit. Integrated liquid cooling removes winding heat without relying on external heat sinks.