Product Description:

The 1MS200D-4D-A2 is a stator component designed by Bosch Rexroth Indramat for the modular 1MB High-Speed Asynchronous Motors series. As the stationary winding set of a frameless spindle motor, it establishes the electromagnetic field that drives the paired rotor. This supports direct-drive spindles in machining centers and other high-speed automation equipment where accurate torque generation and stable thermal behavior are required during continuous cutting cycles.

With a frame size 200 housing, the unit provides a large cross-section for copper conductors and coolant channels, supporting higher continuous power levels than smaller frames. The designation motor length code D indicates an extended axial stack, which increases the installed winding volume for greater torque production. Thermal management is handled by liquid cooling, so process water removes losses directly at the stator surface and permits operation at elevated duty cycles without overshoot. Heat is transferred to the coolant through an aluminum cooling jacket, whose high thermal conductivity lowers the temperature gradient between the windings and the coolant. Electromagnetic parameters are set by winding variant 4D, a coil configuration selected to match the voltage and frequency output of compatible Bosch Rexroth inverters.

Service integration is simplified by the pre-installed 1.5 m connection cable, routed through the stator end to minimize interior clearances inside the spindle housing. As a stator for a 1MB frameless spindle motor, it eliminates a traditional motor frame and allows direct mounting to the machine structure. This arrangement helps create compact spindle assemblies where space around the motor section is limited. It is suited for continuous milling, drilling, and grinding applications that require high rotational speed, stable torque, and controlled stator temperature over long operating periods.