1MS313F-8D-A1/S010

The 1MS313F-8D-A1/S010 is a frameless stator manufactured by Bosch Rexroth Indramat and assigned to the 1MB High-Speed Asynchronous Motors series. Acting as the stationary winding set of a spindle assembly, it generates the rotating field that drives the separate rotor. The part is supplied without a shaft or bearing system so it can be pressed directly into a machine-tool spindle housing, letting designers build compact, high-speed cutting heads for milling, grinding, or drilling operations in automated production cells.

To simplify system integration, the winding set is suitable for third-party drives, enabling pairing with inverters from multiple vendors. A factory-terminated 1.5 m loom carries power and sensor conductors; these leads exit through the stator end, keeping the cable path inside the spindle short and protected. Continuous heat removal is handled by liquid cooling, which channels coolant around the laminations to maintain thermal equilibrium at elevated speeds. Dimensional matching is defined by the motor length code F, indicating the axial stack height used for the 313 frame size.

Temperature supervision is provided by embedded NTC resistors for real-time monitoring and secondary PTC resistors that signal when a shutdown threshold is reached; additional bimetals give a mechanical cut-off for redundant safety. An aluminum cooling jacket surrounds the lamination stack, forming the coolant circuit while adding structural stiffness for precise concentricity. Together these features support stable winding temperatures, minimize thermal expansion, and enhance uptime in high-speed machining centers that rely on constant spindle performance.