Product Description:

The MST531E-0006-FT-N0CN-D303 is a torque motor produced by Bosch Rexroth Indramat in the MST Synchronous Torque Motors series. As a frameless stator unit, it is installed directly into rotary tables, extruders, or printing cylinders so high torque is available at very low shaft speeds without gear reduction. In automation lines, this arrangement simplifies mechanics, improves positioning accuracy, and reduces maintenance associated with belts or gearboxes. Because the stator is integrated into the machine structure, the drive layout can remain compact while avoiding backlash from intermediate transmission components.

At a rated electromagnetic speed of 60 rpm and a constant shaft load of 2150 Nm, the motor delivers a continuous mechanical output of 13.50 kW. Supplying that torque requires a phase current of 36.5 A, and the generated back EMF rises proportionally with speed according to the voltage constant of 4.200 V/rpm. A torque constant of 58.90 Nm/A links drive current to produced torque, while 25 pole pairs support smooth low-speed motion with fine electrical control. The stator is wound with AWG 8 power conductors and 0.5 mm² feedback leads to match common industrial cabling practices and support direct integration with suitable drive hardware.

Short-term demands are met by a peak capability of 5000 Nm, allowing rapid indexing or upset starts before the motor returns to its rated operating zone. Heat generated during these periods is removed by a coolant flow of 10.0 l/min, and with this circulation the thermal time constant is limited to 7.0 min. A winding inductance of 37.5 mH helps filter current ripple and reduce inverter switching stress, while the cold winding resistance affects the initial voltage demand when the winding is at ambient temperature. The 53.0 kg stator mass adds thermal buffering during duty cycles that alternate between positioning and steady-state torque production.