Product Description:

The 1MS160F-4D-A1 stator is produced by Bosch Rexroth Indramat as a frameless spindle motor component. It combines with a matching rotor to form a compact, high-speed drive for CNC machining centers and other automation tasks that demand precise spindle acceleration and sustained duty. By separating the stator from the rotor and bearing system, the motor can be integrated into custom spindle assemblies with very little unused radial space. This layout also helps keep the drive package compact around the spindle axis.

The stator follows the 160 frame size code, giving it an outer diameter that matches standard spindle housings in this class. Its axial length is indicated by the F length code, so the active magnetic stack is longer than that of shorter variants and can generate higher continuous torque when current is supplied. Thermal control is achieved through closed-loop liquid cooling, and the body includes an aluminum cooling jacket that channels coolant directly around the copper windings and stator teeth. A factory-installed 1.5 m loom exits through the non-drive end of the housing, carrying temperature sensors and phase conductors to the cabinet without additional field joints.

This configuration is a stator for a 1MB frameless spindle motor, so it is delivered without bearings or end shields and must be press-fitted into the machine tool spindle sleeve. The surrounding machine structure therefore provides the bearing support and overall spindle geometry. The winding set follows variant 4D, which gives the drive the electrical data needed for accurate vector regulation at high rotational frequencies. Coolant around the winding helps manage heat during long roughing or finishing passes, and its place in the 1MB High-Speed Asynchronous Motors line supports compatibility with liquid-cooled inverters sized for similar frame dimensions.