Product Description:

The MSM031B-R300-NN-M5-MH1 is a synchronous motor manufactured by Bosch Rexroth Indramat and positioned within the MSM IndraDyn S Synchronous Motors series. It provides closed-loop torque and speed control for axes that require compact dimensions and consistent servo performance, such as small pick-and-place units, light conveyors, or auxiliary robotics. By converting electrical energy directly into rotary motion without mechanical gearing, the unit supports compact machine layouts and responsive motion in distributed automation cells.

The motor is cooled by natural convection, so heat is dissipated through the housing without forced airflow. At standstill, it can deliver a continuous torque of 0.64 Nm, allowing it to support a steady load while remaining within thermal limits. A spring-applied holding brake is included, and when energized it supplies 1.27 Nm of counter-torque so vertical axes can remain locked during power removal. The R300 winding code identifies the electrical winding used for this motor version, and frame size 031 indicates the compact housing format used in the MSM family. These characteristics make the motor suitable for applications where stable low-speed control, repeatable positioning, and a small installation envelope are important.

Brake release is handled by an electrical release mechanism, allowing the controller to remove locking torque in a controlled sequence during startup. The housing uses length code B, which gives the motor a predictable axial size for closely spaced machine assemblies. Power transmission occurs through a plain shaft, which works well with clamp-style couplings and avoids the use of a keyed interface. There is no shaft seal, so the motor is best suited for clean installation areas where fluid ingress is not expected. In enclosed or protected machine sections, this arrangement can simplify the shaft end while still supporting accurate rotary motion and reliable servo operation.