Product Description:

The MST210E-0027-FT-N0RN-NNNN is a liquid-cooled synchronous torque motor manufactured by Bosch Rexroth Indramat within the MST Synchronous Torque Motors series. It installs as a direct-drive stator that couples to a separate rotor so the load receives torque without mechanical gearing. This arrangement is used in rotary tables, extruders, and other automation axes that need precise low-speed motion and high continuous torque.

Under nominal conditions, the stator produces 270 rpm while maintaining a continuous output of 240.0 Nm; these values yield a rated mechanical power of 6.80 kW. Supplying this operating point requires a phase current of 24.0 A. The electromagnetic design delivers a torque constant of 10.00 Nm/A, so every ampere contributes predictably to load torque. Electrical parameters include 14 mH of winding inductance and 2.16 Ω of winding resistance, both of which affect drive-controller tuning and thermal loading. Heat is extracted through a 6.0 L/min coolant stream that experiences only 0.1 bar of pressure loss, while the jacket can tolerate inlet pressures up to 3.0 bar. With a stator mass of 18.8 kg and a thermal time constant of 3.0 min, temperature rises quickly but stabilizes just as fast, allowing short duty-cycle adjustments without excessive overshoot.

When the application demands higher output, the motor can accelerate to a ceiling of 600 rpm and deliver a peak torque of 500.0 Nm, while the drive may momentarily supply up to 90.0 A. These excursions raise internal losses to 4.00 kW, making coolant flow essential during heavy operation. Even at full load, the hydraulic circuit adds only 0.1 bar to system backpressure, which helps preserve pump efficiency. The winding inductance also limits how quickly current can change, helping the drive avoid excessive voltage spikes during rapid torque commands.