Product Description:

The MST210C-0050-FT-N0SN-NNNN is a direct-drive torque motor built by Bosch Rexroth Indramat for the MST Synchronous Torque Motors series. It is intended to supply high continuous torque at low rotational speed so rotary tables, printing cylinders, or extruder screws can be driven without gears in automated machinery. Liquid circulation through internal channels removes heat, allowing the stator to remain in its thermally encapsulated housing while the small-diameter cable at the stator end brings power to the winding.

During continuous operation, the motor delivers 120 Nm of shaft torque while turning at a rated speed of 500 rpm; together these values correspond to a mechanical output of 6.9 kW. To obtain that torque, the drive supplies a steady phase current of 25 A. Transient events such as acceleration can be handled because the winding can accept up to 100 A for short periods. Electrical behavior is influenced by a 7.6 mH inductance that moderates current rise and by a 1.23 Ω resistance that contributes to copper losses. A 4.0 mm² power conductor cross-section is used so cabling can carry the required current without thermal overload. The liquid cooling path keeps winding temperature within limits set by the encapsulation resin, maintaining magnetic properties and preventing torque derating.

The motor can reach a maximum torque of 250 Nm, giving the axis the ability to overcome load peaks without supplemental gearing. Each ampere increases output by 4.80 Nm/A, and the generated back EMF follows the voltage constant of 0.310 V/rpm, which supports current and voltage control in the inverter. A stator mass of 11.5 kg provides thermal inertia and mechanical stiffness while still allowing compact installation. With a stator-end cable rather than a terminal box, assemblies can be routed through confined spaces, and the thermal encapsulation seals the windings against coolant ingress so the motor can maintain performance in continuous-duty production lines.