Product Description:

The MSM031B-0300-NN-MQ-MH0 belongs to the MSM IndraDyn S Synchronous Motors series from Bosch Rexroth Indramat. It is a compact permanent-magnet motor used in industrial automation for point-to-point positioning, indexing tables, and small gantry axes where precise torque control and fast acceleration are required. When paired with IndraDrive amplifiers, the unit converts electrical command signals into rotational motion that moves fixtures, grippers, or sensor stages with high repeatability. Its compact form helps it fit tightly spaced axes where low moving mass supports quick response during frequent starts, stops, and direction changes.

The motor can deliver a continuous standstill torque of 0.64 Nm, which is the load it can hold at rated current without overheating while locked in place. Passive cooling through natural convection allows heat to dissipate without blowers or liquid circuits, which simplifies cabinet layouts. A frame code of 031 indicates the stator diameter and mounting bolt circle used for small gearheads and couplings. A length code of B gives the motor a slightly longer active core for improved thermal capacity without changing the flange size. A stator winding code of 0300 matches the electrical characteristics expected by low-voltage servo drives that need rapid current rise during dynamic cycles.

There is no holding brake, so the drive must provide parking torque or an external clamp when the axis is idle. As a synchronous motor, it keeps rotor position aligned with the commanded electrical angle for predictable interpolated motion. The housing has no shaft seal, so contamination control depends on the surrounding enclosure and the conditions inside the machine. Because the seal is omitted, the motor is better suited to clean, controlled environments than to wet or dirty areas. A plain shaft reduces friction and supports press-fit connections to timing pulleys or precision couplings where added mechanical complexity is not wanted.