Product Description:

The MST160A-0050-FT-N0CN-D303 torque motor is produced by Bosch Rexroth Indramat as part of the MST Synchronous Torque Motors series. It is supplied as a stator segment that couples directly to a matching rotor, allowing machine builders to create low-speed, high-torque rotary axes without mechanical reduction stages. In industrial automation, the unit drives rotary tables, extruders, and print cylinders where smooth, gear-free motion improves positioning accuracy and reduces maintenance.

During continuous operation, the stator delivers 40 Nm of continuous torque at a rated speed of 500 rpm, which corresponds to a mechanical output of 2.10 kW while the phase windings draw 7.5 A. A torque constant of 5.33 Nm/A links produced torque to drive current, simplifying current-loop tuning in the servo amplifier. The 180 mm outside diameter fits into compact machine frames, and the 95 mm cooling-jacket length provides enough surface area for liquid cooling when high duty cycles are required. Winding resistance is 8.6 Ω at 20 °C, and the windings present inductive behavior that affects the voltage rise time demanded from the inverter. The stator mass is 5.6 kg, so installation adds minimal inertia to the rotating system. Lead wires are supplied in AWG 14, giving adequate ampacity for both rated and standstill conditions.

Transient loads are handled by a peak torque of 90 Nm, delivered for short intervals when commanded current reaches 20.0 A. At zero speed, the electromagnetic structure maintains a holding torque of 43 Nm, allowing the axis to resist process forces during dwell periods. The magnetic circuit has a winding inductance of 30.5 mH, which filters current ripple from pulse-width-modulated drives and limits di/dt stress on the power stage.