Product Description:

The 1MS310B-6B-A2/S011 stator belongs to the 1MB High-Speed Asynchronous Motors series from Bosch Rexroth Indramat. As a separable stator element, it is intended for incorporation into frameless spindle motors used in high-speed machining centers where compact envelopes and direct integration into the machine structure are important. Within an automation cell, the stator provides the stationary electromagnetic field that interacts with the rotor to generate torque at elevated spindle speeds, allowing precise material removal without relying on belt or gear transmissions.

Within the motor assembly, the windings are supplied via a 1.5 m loom that exits through the stator end, giving a fixed lead length and a sealed pass-through. Cooling is handled by a liquid cooling circuit that transfers heat to the machine’s hydraulic or glycol line instead of relying on ambient air. The mechanical envelope corresponds to frame size 310, a diameter class standardized across the spindle family. Electrical, mechanical, and thermal parameters are matched to designated rotors and bearing supports so the stator fits the intended spindle assembly.

The active stack is identified by the B length code, a notation that places the lamination packet in the medium depth category to balance torque density and overhang. Magnetic behavior is further tailored by the 6B winding variant, which combines slot count and conductor cross-section to match the voltage constant demanded by high-speed spindles. Heat collected at the teeth is conducted radially into an integral aluminum cooling jacket, allowing even temperature distribution around the housing. Supplied as a stator for a 1MB frameless spindle motor, this component is delivered without a rotor or end bells so it can be integrated directly into custom cartridge or block housings.