Product Description:

The MSK103A-0300-NN-M1-UG0-NNNN synchronous servomotor is built by Bosch Rexroth Indramat and belongs to the MSK IndraDyn S Synchronous Motors series. In automated assembly lines, pick-and-place modules, or machining centers, it functions as a closed-loop drive axis that converts electrical energy from an inverter into precisely metered torque and speed for accurate positioning and velocity control. The motor is supplied without a holding brake, so load-side retention must be provided by the drive torque or by an external mechanical clamp.

Heat generated in operation is removed by natural convection, so unobstructed airflow around the housing is necessary to maintain safe winding temperature. Position feedback comes from an optical sensing system, and communication with the drive is handled through the Hiperface protocol that carries both absolute and incremental data on a single cable. The code disk provides 128 signal periods, which, after interpolation, give fine speed resolution at low rpm. Because the encoder is a multiturn absolute device, it preserves shaft position across power cycles, eliminating homing after outages. The encoder connector can be rotated through 240° to simplify cable routing.

Mechanically, the frame corresponds to size 103, providing the torque density expected for this diameter. The stator stack uses length code A, which shortens the overall body for installations with limited depth. Torque is transmitted through a plain shaft, which avoids keyway stress concentrations and suits shrink-fit or collet couplings. Electromagnetic characteristics are set by winding code 0300, aligning the voltage constant with IndraDrive converters that operate on common DC bus levels. The motor uses a standard design and sealed housing for protection, and it does not require auxiliary cooling accessories.