Product Description:

Bosch Rexroth Indramat manufactures the MSM031B-0300-NN-M5-ML1 servo unit as a member of the MSM IndraDyn S Synchronous Motors series. This permanent-magnet AC motor is intended for light-duty automation such as indexing tables, compact gantries, and electronic assembly lines where space is limited and control cycles must stay repeatable. By providing tightly regulated torque and speed, the motor serves as the rotary actuator that closes the motion loop between a drive controller and the mechanical load in these systems. Its compact format also suits installations where axis spacing is tight and stable response is required over repeated cycles.

The MSM031B-0300 model delivers a continuous stall torque of 0.64 Nm, so its shaft can hold or move a load at that level without overheating during steady operation. Heat generated at this rating is removed through natural convection, so no forced-air or liquid cooling accessories are needed. A fail-safe stop is managed by an electrically actuated brake that uses an electrical release mechanism, allowing the controller to energize the coil to disengage the brake only when motion is commanded. When engaged, the brake supplies 1.27 Nm of static holding torque, which helps prevent drift on vertical or inclined axes once power is removed. The frame code of 031 gives a predictable envelope for mounting plates and coupling hardware.

The housing follows the compact B-length format, so total axial depth is minimized for cabinets or linear modules with tight stacking distances. That short housing helps the unit fit assemblies where installation depth is limited. Winding code 0300 identifies the coil impedance set used with compatible drive controllers for proper current scaling and dynamic response. A dedicated holding brake is factory installed, eliminating the need for external clamping devices on axes that must remain in position after power is removed. The motor also uses consistent electrical and mechanical interfaces with other MSM models, which helps maintain a uniform layout across multi-axis equipment.