Product Description:

The Bosch Rexroth Indramat MSK103B-0302-NN-S1-UG1-NNNN belongs to the MSK IndraDyn S Synchronous Motors series. As an IndraDyn S synchronous servomotor, it transforms drive current into precise rotary motion for positioning and speed control in automated machinery. It supports closed-loop operation with Rexroth drive controllers used on packaging lines, machining centers, and material-handling systems, where repeatable starts, stops, and speed changes are required.

Its thermal management relies on natural convection, eliminating forced airflow or liquid circuits and simplifying cabinet layouts. An electrically released holding brake rated at 33 Nm secures the load during power-off events, while the housing carries an IP65 rating that blocks dust ingress and deflects water jets from the windings. Safe operation is specified for ambient temperatures from 0 to 40 °C, and a rotatable 240° encoder connector helps align the cable exit with available machine clearances. Position data travels through the Hiperface digital interface, and the standard encoder housing keeps the feedback assembly compact within the motor body. The size 103 laminations and B length support the required torque range without increasing the installation footprint.

Fine positioning resolution is delivered by an internal scale that generates 128 signal periods per mechanical revolution, and the optical pickup helps limit interpolation error during high-speed contouring. The feedback system is single-turn, so absolute position within one revolution is retained without batteries, which suits short-stroke rotary axes and indexing applications. Class 155 insulation withstands the winding temperatures produced by repetitive acceleration cycles, and the plain shaft transmits torque without keyway stress when clamped by precision couplings.