Product Description:

The 1MS375D-6B-A1 is a stator module manufactured by Bosch Rexroth Indramat for the 1MB High-Speed Asynchronous Motors series. Serving as the stationary winding set in a frameless spindle drive, it generates the rotating magnetic field that accelerates a matched rotor to the elevated speeds required in CNC machining centers, grinding heads, and drilling units. Supplying the electromagnetic core without an external housing allows the stator to be embedded directly inside a custom spindle body, which shortens the drive train and reduces reflected inertia. This configuration supports precise tool positioning and tight surface-finish tolerances in continuous industrial operation.

The electromagnetic package is built on a frame diameter of 375, providing space for a large copper cross-section and a corresponding thermal envelope. Within this frame, the motor uses a length code of D, which indicates the axial stack height of the laminations and is associated with continuous output torque potential. Heat produced by copper losses is removed through liquid cooling, a closed-loop circuit that keeps winding temperature below the insulation limit even under heavy cutting loads. Power reaches the windings through a factory-terminated harness of 1.5 m, and the primary connection cable supports quick integration to the cabinet power bus.

Mechanical durability is reinforced by an aluminum cooling jacket that surrounds the stator body and forms the liquid channel. The harness is routed through the stator end to shorten the distance to terminal blocks and minimize electromagnetic interference with position feedback devices. Winding layout code 6B matches the electrical characteristics of high-frequency spindle inverters through its slot pitch and wire gauge. When installed around a compatible rotor, the assembly functions as a complete stator for 1MB frameless spindle motor capable of sustaining prolonged high-speed cycles in automated production lines.