Product Description:

The 1MS160F-4A-A1/S010 is a stator component produced by Bosch Rexroth Indramat for the 1MB High-Speed Asynchronous Motors series. It is intended for frameless spindle assemblies in which the rotor mounts directly on the machine shaft and the stator is press-fitted into the surrounding housing, eliminating the need for a separate motor frame. In machining centers, grinding heads, and test rigs, this component converts three-phase drive power into a rotating magnetic field that accelerates high-speed spindles while supporting accurate motion under changing loads. Because the rotating element is mounted by the machine rather than by a separate motor housing, the assembly suits spindle designs that prioritize stiffness and compact packaging.

It uses a frame size 160 housing that sets the outer diameter and mounting circle for alignment inside the spindle shell. Heat is removed through liquid cooling, allowing the stator to sustain high current density during continuous duty while keeping thermal conditions stable in compact housings. A pre-installed 1.5 m connection cable exits through the stator end, simplifying internal wiring and reducing the need for additional cable routing space. The copper pack uses winding variant 4A, and protection against overtemperature is provided by integrated NTC resistors, PTC resistors, and bimetals that send thermal status signals to the drive.

Integration into a machine frame is simplified because the stator is suitable for third-party drives, which allows use with non-Rexroth inverters when required. The windings are enclosed in an aluminum cooling jacket that directs coolant around the laminated core and helps limit thermal gradients during load changes. Overall axial length follows motor length code F, balancing torque capability with the installation space available in compact spindle heads. The element is classified as a stator for a 1MB frameless spindle motor, so the mechanical reference surfaces and electrical leads follow the format used throughout the series.