Product Description:

The 1MS310B-6E-A1/S010 is manufactured by Bosch Rexroth Indramat and belongs to the 1MB High-Speed Asynchronous Motors series. The unit is a stator for a frameless spindle motor, so it generates the stationary magnetic field while the rotor and surrounding housing are supplied by the machine builder. This arrangement supports high-speed, direct-drive spindle designs used in milling, drilling, and grinding equipment. It also lets the spindle assembly be matched to the space and performance needs of the machine.

This stator is built on frame size 310, giving it an outside diameter suited to large machine tool headstocks. The motor length code B indicates its axial stack height, which affects continuous torque capability without making the spindle unnecessarily long. Electrical behavior is set by winding variant 6E, whose turn count and wire gauge set the base impedance and voltage rating when used with standard inverters. Heat produced inside the slots is removed by a closed-loop liquid cooling channel, so coolant flow helps keep winding temperature stable during high-duty operation. Power, sensor, and ground conductors are grouped in a preterminated 1.5 m cable set that exits through the stator end, which simplifies installation because no intermediate terminal box is required.

The magnetic core is surrounded by an aluminum cooling jacket that acts as both a structural shell and the main heat exchanger for the circulating fluid. Temperature feedback is handled by integrated NTC resistors, rapid-response PTC resistors, and trip-level bimetals. This combination gives the control system several ways to monitor heat buildup and respond before the winding temperature rises too far. Because the 1MS stator follows open-interface electrical conventions, it remains compatible with third-party drives, allowing the spindle system to be matched with a preferred inverter while retaining its thermal protection features.