Product Description:

The 1MS200E-4B-A1 is a stator assembly supplied by Bosch Rexroth Indramat for integration in frameless spindle motors belonging to the 1MB High-Speed Asynchronous Motors series. As the stationary electromagnetic section of the motor, it generates the rotating field that drives a high-speed spindle used in machine tools and other automated machining centers. When paired with its corresponding rotor, the unit allows compact spindle construction, direct coupling to the workpiece, and precise speed control within industrial automation cells.

This stator relies on liquid cooling; coolant channels molded into the housing remove heat as winding current rises during prolonged high-speed operation. The magnetic core follows the dimensional standard of frame size 200, establishing the outer diameter that must be accommodated by the machine headstock. Rotor overhang and torque capability are set by motor length code E, which indicates the axial stack height of the laminations. Electrical characteristics are set by winding variant 4B, so resistance and inductance match 1MB drive modules for correct current regulation. Thermal transfer is enhanced by an aluminum cooling jacket bonded to the stator teeth, reducing temperature gradients between the copper conductors and the external coolant loop.

Cabling is simplified because the phase leads exit as a pre-terminated 1.5 m loom routed through the non-drive end of the stator, minimizing internal clearances. The component is delivered as a stator for a 1MB frameless spindle motor, so its centering surfaces align directly with standard 1MB rotors and bearing units. It belongs to the 1MB High-Speed Asynchronous Motors series, which uses common mounting hardware, sensors, and coolant fittings across compatible frame sizes. Supplied by Bosch Rexroth Indramat, the stator serves as a build component for OEM spindle assemblies that require consistent electromagnetic performance across multiple machine platforms.