Product Description:

The MSK103B-0300-NN-S2-UG0-RNNN is an IndraDyn S synchronous servo motor built by Bosch Rexroth Indramat for the MSK IndraDyn S Synchronous Motors series. It converts controlled three-phase electrical power into precisely regulated mechanical rotation for positioning, conveying, and tooling axes in automated equipment. In servo systems, this lets the paired drive regulate torque and speed with the fast response needed for repeatable motion. The motor is suited for machine axes that run frequent start-stop cycles and require consistent rotary output during production.

This model uses natural convection, so heat is released through the housing surface without auxiliary fans or liquid circuits. Its enclosure is rated IP65, which helps keep dust and low-pressure water jets away from internal components in industrial settings. Position feedback is transmitted through the EnDat2.1 digital interface, and the optical encoder provides 2048 signal periods per revolution in a single-turn format for accurate rotor-angle detection. Because the feedback is digital, the connected controller receives position data suitable for commutation and closed-loop motion control. The encoder connector can rotate 240 degrees, which helps with cable routing in compact machine layouts. The motor has a plain shaft that supports backlash-free clamp couplings, and it is supplied without a holding brake.

The permitted ambient operating range is 0–40 °C, supporting rated performance across normal shop floor temperatures. Insulation class 155 allows the winding system to withstand elevated internal temperatures during intermittent overload. The winding code 0300 indicates the electrical resistance and inductance values used with compatible Rexroth drive controllers. The motor also has increased concentricity, which reduces radial runout for smoother rotation at higher speeds. In this configuration, size 103 provides a 130 mm frame width, and length B gives a mid-length rotor stack that balances torque density with inertia.