Product Description:

The MST210C-0027-FT-N0CN-NNNN torque motor is produced by Bosch Rexroth Indramat within the MST Synchronous Torque Motors series. It is a direct-drive rotary unit intended to generate high continuous torque at low speed for indexing tables, extruders, and similar automation axes. By coupling directly to the load without gear reduction, the motor simplifies mechanical layouts and provides precise position control in industrial automation cells. The stator windings and permanent-magnet rotor are configured for a 20-pole-pair topology.

Under continuous rating, the motor supplies 120.0 Nm while turning at 330 rpm, yielding mechanical output of 4.10 kW. This duty point draws 13.0 A from the inverter during continuous operation. The torque produced per ampere is 9.20 Nm/A, so moderate current changes create measurable torque steps during closed-loop regulation. A voltage constant of 0.620 V/rpm indicates the back-EMF the drive must overcome at speed. For current rise behavior, the three-phase winding has 30.1 mH of inductance and 5.2 Ω of resistance measured at 20 °C, and these values influence dynamic response and copper losses.

During transients the motor can reach 250 Nm of peak torque while accepting 50.0 A of phase current; these limits determine inverter overload sizing. Electrical speed is permitted up to 950 rpm, giving headroom for rapid indexing before settling to rated conditions. At zero speed the stator can hold 132 Nm with a standstill current of 14.3 A. Continuous operation requires liquid cooling, and the housing must receive 6.0 l/min of coolant to stabilize winding temperature. With a compact thermal mass, the assembly reaches 63 % of its final temperature in 3.0 min, so temperature feedback should be monitored soon after load changes.