Product Description:

The 1MS140F-4A-A1/S010 is manufactured by Bosch Rexroth Indramat and belongs to the 1MB High-Speed Asynchronous Motors series. It is a stator assembly intended for integration into high-speed spindle motors used in metal-cutting and other automated machining centers. When paired with a matching rotor and drive, this component produces the rotating magnetic field required for precise torque and speed control in industrial automation systems. In a spindle assembly, the stator remains stationary while the magnetic field it generates acts on the rotor to create controlled motion at very high operating speeds.

This stator relies on liquid cooling, routed around an aluminum cooling jacket, to remove heat directly from the windings during continuous high-speed operation. A pre-installed connection loom measuring 1.5 m exits through the non-drive end of the housing, allowing straightforward connection to cabinet terminals. The unit has a frame size 140, while the 4A winding variant sets the electrical characteristics used by the matching drive system. This combination supports high power density and stable thermal performance during demanding spindle duty. It is well suited for applications such as precision grinding, micro-milling, and glass cutting, where speed stability and consistent thermal behavior are important.

With the F motor length code, the lamination stack provides greater axial length for higher continuous power than shorter versions in the same platform. Temperature monitoring is handled by NTC resistors, PTC resistors and bimetals embedded in the winding overhang, supplying drive electronics with real-time thermal data. The unit is suitable for third-party drives, which makes it useful in retrofit or mixed-vendor production lines, and it is classified as a stator for 1MB frameless spindle motor. Because these sensors report temperature changes directly from the winding area, the control system can reduce current before overheating develops. Electrical isolation between the laminated core and the cooling jacket also helps reduce ground-loop effects and conducted noise.