Product Description:

The MST210C-0050-FT-N0RN-NNNN is a frameless synchronous torque motor produced by Bosch Rexroth Indramat as part of the MST Synchronous Torque Motors series. Designed for direct integration into rotary tables, printing cylinders, and extruder screws, the unit replaces gearboxes by applying high continuous torque at low speed. Within automated lines, this configuration minimizes backlash, improves position accuracy, and supports closed-loop speed control when paired with an external drive controller. It is supplied without an integrated encoder, allowing machine builders to select external feedback devices appropriate to their control topology.

At its nominal operating point, the motor supplies 120 Nm of shaft torque while turning at 500 rpm. This combination equals 6.90 kW of mechanical output and requires a phase current of 25 A from the inverter, a rating suited for continuous S1 duty when the coolant enters at 60 °C. The 7.6 mH winding inductance smooths current rise, allowing the drive to regulate torque precisely, and the 1.23 Ω winding resistance contributes to copper losses that are removed by the integrated liquid jacket. Thermal encapsulation transfers that heat outward, preserving insulation life during uninterrupted production cycles.

In short-term load spikes, the stator can deliver up to 250 Nm, and the rotor can accelerate to 1200 rpm when the drive supplies 100 A. The electromagnetic design provides that reserve through a torque constant of 4.80 Nm/A, giving predictable output across the control range. A coolant flow of 6.0 l/min through the housing keeps winding temperature stable, while the radial, large-diameter power cable accepts 4.0 mm² conductors for low-impedance connections. Heat is removed by the liquid-cooling circuit, so the motor can be installed in confined spaces without auxiliary fans.