Product Description:

The MSM031B-0300-NN-M5-MH1 is a synchronous motor produced by Bosch Rexroth Indramat for the MSM IndraDyn S Synchronous Motors series. It is used in compact positioning axes and light handling modules, where it converts three-phase drive signals into precise shaft rotation for controlled servo motion. An internal brake allows the driven load to be held when power is removed, so separate external locking devices are not required for many axis arrangements. Its compact format also helps limit moving mass on small servo axes used in assembly lines, small conveyors, and indexing tables.

The motor develops a continuous standstill torque of 0.64 Nm, providing stable force during static load conditions and fine motion increments. When power is removed, the integral brake supplies 1.27 Nm of holding torque so vertical or suspended loads can remain in place. The brake uses an electrically released design, which means it disengages only when voltage is applied. Thermal energy is removed through natural convection, so the installation does not require forced-air or liquid cooling hardware. The motor uses a plain shaft interface for coupling to precision gearheads or timing pulleys, which supports low-vibration drive trains and accurate torque transfer.

Mechanical proportions follow the IndraDyn S coding system: the frame size is 031 and the housing uses length code B. This combination gives the motor the mounting footprint and body length associated with that size class. The motor uses winding code 0300, which indicates the electrical values matched to compatible IndraDrive servo amplifiers. There is no shaft seal, so the motor is best suited to clean environments where liquid ingress is not expected. This layout also helps the unit fit compact machine spaces without adding external cooling components or sealing hardware.