Product Description:

The 1MS310D-6B-A1 is a dedicated stator element intended for integration into the 1MB High-Speed Asynchronous Motors series produced by Bosch Rexroth Indramat. Working with a matching rotor, it generates the rotating magnetic field that drives a machine-tool spindle. This arrangement supports compact spindle layouts where direct-drive speed control, smooth torque delivery, and high rotational stability are required. The unit is intended for high-speed machining centers that use a built-in motor structure instead of a fully enclosed motor housing.

This stator is supplied with a 1.5 m loom routed through the non-drive end, so power and thermal sensor leads can reach the cabinet without an intermediate junction. Its windings use liquid cooling, allowing circulating coolant to remove heat directly from the assembly during sustained high-speed operation. The unit is built in frame size 310, which suits large-bore machine housings while maintaining high radial stiffness. Its axial build uses length code D, which provides additional active stack depth and increases available torque without increasing diameter. An aluminum cooling jacket surrounds the laminated stack and forms the coolant channel around the stator body. The electrical arrangement uses winding variant 6B, which matches the voltage constant and permissible current needed for high-frequency inverter operation in this motor platform.

Because the unit is a frameless spindle motor stator, it can be press-fit into a custom machine housing and paired with an application-matched rotor. This format helps the spindle assembly remain compact while supporting high surface speeds and precise rotational behavior. It also allows the motor section to be integrated directly into the machine structure, which can reduce external coupling elements and preserve a clean mechanical layout around the spindle.