Product Description:

The 1MS160N-4C-A2 stator is manufactured by Bosch Rexroth Indramat for the 1MB High-Speed Asynchronous Motors series. It forms the stationary electromagnetic section of a frameless spindle motor and works with a separate rotor to generate the rotating field needed for high-speed machining centers, grinding heads, and test rigs. Because the active assembly is installed directly into the machine housing, the design helps reduce overall spindle diameter while leaving the surrounding structure free for bearings, shaft support, and other integrated components. This arrangement also lets the machine structure provide rigid support around the motor section, which is useful where spindle stiffness and compact packaging are important.

Heat is removed through liquid cooling, so coolant circulating around the jacket helps stabilize winding temperature during continuous operation at elevated speed. Electrical termination is provided by a 1.5 m loom that exits at the non-drive end, which helps route conductors toward the control cabinet without adding a separate terminal box. Mechanical sizing follows frame size 160, so the outside diameter and mounting pattern match other parts built on this frame. The magnetic circuit uses winding variant 4C, which matches the electrical characteristics expected by the associated inverter. Thermal transfer is supported by an aluminum cooling jacket, which conducts heat efficiently from the laminated core and windings to the coolant path.

This unit is a stator for a 1MB frameless spindle motor, and its axial build corresponds to motor length code N. In this mid-length format, the active stack offers a balanced layout for applications that need compact radial packaging without using the shortest or longest motor body in the range. The stator is supplied as the fixed motor element, so it can be integrated into a spindle housing together with the mating rotor and the rest of the machine's support hardware. That format is suited to custom spindle designs where the motor, shaft, and cooling passages are assembled as one integrated unit.