Product Description:

The 1MS310D-6B-A2/S011 is a dedicated stator subassembly supplied by Bosch Rexroth Indramat for high-speed spindle applications. It generates the stationary electromagnetic field that interacts with a separately installed rotor, so the spindle can produce controlled torque at very high rotational speeds in woodworking, metal-cutting, and composite machining centers. Because only the stationary section is provided here, the part is intended for machines that use a frameless motor layout, where the surrounding spindle structure supports heat removal and keeps the magnetic assembly rigid during continuous operation. This arrangement is common in machine-tool spindles where compact diameter, smooth rotation, and direct integration into the spindle cartridge are required.

The stator belongs to the 1MB High-Speed Asynchronous Motors series, and its thermal design uses liquid cooling rather than ambient-air cooling. The body is built with an aluminum cooling jacket, which carries coolant channels close to the laminations so heat can move quickly into the spindle housing. Its dimensions follow frame size 310, while motor length code D provides an extended active length that supports sustained output. Electrically, winding variant 6B establishes the winding arrangement used with the matching drive system and the intended high-speed operating range.

A pre-terminated service lead is included as a 1.5 m loom, and it exits through the non-drive end of the housing to keep the connection point away from the spindle nose. Classified as a Stator for 1MB Frameless Spindle Motor, the unit is installed by thermal shrink-fit into the machine sleeve, leaving the rotor to turn inside the bore without mechanical contact. This layout helps protect the lead from the working area, keeps the stator fixed in the spindle housing, and supports stable operation where compact spindle assemblies need direct cooling around the active magnetic core.