Product Description:

The MSM031B-R300-NN-M0-CH0 is a synchronous motor manufactured by Bosch Rexroth Indramat for the MSM IndraDyn S Synchronous Motors series. It serves as a compact rotary actuator for industrial automation, providing closed-loop motion when paired with an IndraDrive controller. By translating controlled stator currents into precise rotor movement, the motor supports positioning, indexing, and light-duty feed tasks in machinery that requires accurate motion in a small installation space. Its compact format suits axes where short travel distances, low moving mass, and precise response are important.

This model supplies a continuous standstill torque of 0.64 Nm, which helps the axis maintain holding force under steady load at zero speed. Thermal energy is dissipated by natural convection, removing the need for external fans or liquid circuits and simplifying machine layout. Power and feedback conductors exit through a cable tail, allowing direct routing through drag chains or tight enclosures. Rotor position is detected by a multiturn absolute encoder, so the drive retains position data across power cycles without a homing routine. The motor is delivered without a holding brake, so any requirement for power-off shaft locking must be handled by external mechanics or controlled drive torque.

The mechanical envelope follows motor length B, which provides a consistent installation depth for compact machine sections. Its frame corresponds to motor size 031, so the mounting geometry matches other motors in the same size class. Motion is transmitted through a plain shaft, which is suited for clamp couplings or press-fit transmission elements where low backlash is required. Internally, the R300 winding sets the electrical values used by compatible IndraDrive amplifiers, helping the current loop maintain stable regulation and accurate commutation during positioning moves. This arrangement supports repeatable motion on small axes that need precise control without a large motor footprint.