Product Description:

Bosch Rexroth Indramat manufactures the MST450E-0012-FT-N0CN-D303 stator within its MST Synchronous Torque Motors series. This frameless unit is intended for direct-drive rotary tables, printing cylinders, or winders where high torque is required at very low speed. As a permanent-magnet synchronous motor element, it provides precise torque generation without gearboxes, supporting compact machine layouts in industrial automation. Because the stator is frameless, it can be integrated directly into a machine structure that already carries the bearing system.

The motor has a rated speed of 120 rpm and a rated torque of 1400 Nm, providing steady low-speed drive for indexing tables and extruders. At that operating point, the output power is 17.6 kW while phase current remains at 46 A. The magnetic design yields a torque constant of 30.40 Nm/A, allowing the controller to relate current closely to produced torque during regulated motion. Winding resistance is 1.1 Ω at 20 °C, and back EMF rises by 1.930 V for each rpm. Motor leads accept 10.0 mm² conductors, and feedback or sensor wiring uses AWG 8 terminals for straightforward cabinet connections.

During rapid acceleration, the motor can produce up to 3250 Nm of torque with a momentary current limit of 125 A. Internal cooling passages require 9.6 l/min of water-glycol coolant, and inlet pressure must not exceed 3.0 bar so heat can be removed without stressing the cooling circuit. The electromagnetic circuit has an inductance of 10 mH, which influences current rise and the drive’s control response during dynamic load changes. The assembly weighs 54.2 kg, adding thermal mass that helps slow short-term temperature rise during repeated overload events. Drive selection should also account for the motor’s voltage constant and winding resistance so low-speed torque control remains stable across cyclic duty.