Product Description:

The MSK103D-0300-NN-M1-UG0-NNNN is a synchronous servo motor manufactured by Bosch Rexroth Indramat within the MSK IndraDyn S Synchronous Motors series. As an IndraDyn S unit, it converts electrical energy from a drive into precise rotary motion for automated machine tools, handling systems, and packaging stations that require repeatable position control. The motor is built in the standard mechanical design, carries size code 103, and is delivered without a holding brake, so external locking devices or drive torque must secure the load when power is removed.

This model relies on natural convection for heat removal, so airflow around the housing must be maintained to keep the stator windings within their thermal limit. Feedback is supplied through a rotatable 240° encoder connector that carries signals from a Hiperface interface. The optical feedback system resolves rotor position into 128 signal periods, and its multi-turn absolute capability preserves position information across power cycles, eliminating homing moves after shutdowns. A dust-tight, water-jet-resistant housing rated at IP65 guards the stator, bearings, and connector set from contamination, permitting installation on open machine frames without additional enclosures.

Safe operation is specified for ambient temperatures between 0 to 40 °C, and staying inside this range helps prevent derating that could otherwise limit peak torque. The motor has a plain shaft, which simplifies coupling to belt pulleys or rigid hubs where keyways are unnecessary. The motor uses insulation class 155, meaning the varnish and winding materials tolerate a 155 °C reference temperature before their lifespan shortens. Its internal electromagnetic properties are matched to winding code 0300, and the D-length housing provides a deeper active stack than shorter variants, allowing higher continuous torque without altering the 103 mm mounting pitch.