Product Description:

The MST450E-0006-FH-N0KR-NNNN torque motor is manufactured by Bosch Rexroth Indramat for the MST Synchronous Torque Motors series. This direct-drive unit is intended for low-speed, high-torque duties in rotary tables, extrusion screws, and large indexing mechanisms used in industrial automation. The rotor drives the load directly, which can reduce backlash and remove the need for an external gear stage in many slow-speed axes. That arrangement is useful in applications that need smooth rotation and precise position control from a drive amplifier. Because it is a synchronous torque motor, it is suited to applications where steady low-speed motion is more important than high shaft speed.

Thermal management is handled by liquid cooling, and a cooling jacket built into the housing routes coolant around the stator to remove heat near the copper windings. The power conductors terminate in a right-side terminal box, and cable sizes up to 6.0 mm² fit the gland without extra lugs. The right-side terminal box also provides a fixed routing point for incoming power leads. Under nominal conditions, the motor has a rated speed of 60 rpm and delivers 1400 Nm of continuous torque. At that operating point, the mechanical output equals 8.80 kW. At rated load, the motor draws 32.0 A, and the winding has 30 mH of inductance with 3.2 Ω of resistance at 20 °C. The assembly weighs 92 kg and is supplied without an encoder, so external feedback can be selected to match the application.

During transients, the drive can supply up to 88.0 A, allowing the rotor to produce 3250 Nm of peak torque for short forming, clamping, or rapid index moves. A torque constant of 43.80 Nm/A provides a linear relationship between commanded current and developed torque. This short-term overload range is useful when the application needs breakaway torque, brief clamping force, or fast index acceleration. The internal coolant circuit limits temperature rise during short overload periods.