Product Description:

The 1MS200H-4B-A1/S010 is a frameless spindle motor stator supplied by Bosch Rexroth Indramat within the 1MB High-Speed Asynchronous Motors series. As a standalone stator, it is intended for direct integration into machine spindles where high-speed induction torque is required for metal cutting, grinding, or woodworking centers. When combined with a compatible rotor and drive controller, the unit converts three-phase electrical energy into the rotating magnetic field that drives the spindle, allowing compact machine layouts and precise speed regulation in automated production.

The stator uses liquid cooling, so heat is transferred away through the jacket rather than the surrounding air, enabling continuous operation at elevated spindle speeds. Its frame size of 200 identifies the outside diameter class and sets the housing interface that must be provided by the machine builder. The motor length code H designates the active stack height, affecting achievable power density. An aluminum cooling jacket surrounds the laminations, and the high thermal conductivity of aluminum promotes even temperature distribution across the winding heads. Electrical connection is made through a 1.5 m loom that exits the stator end, giving immediate reach to terminal strips without additional extensions.

The electromagnetic design follows winding variant 4B, meaning the coil pitch and conductor cross-section are matched to high-frequency inverter output while limiting copper losses. Because the stator is suitable for third-party drives, it can be paired with non-Rexroth inverters that deliver the required voltage and frequency range. Internal temperature surveillance is provided by NTC resistors, PTC resistors, and bimetals, each responding at different thresholds to supply the drive with warning or shutdown signals. These protective elements support reliable duty cycles in automated machining environments where thermal overstress and unscheduled downtime must be avoided.