Product Description:

The MST360B-0018-FT-N0RN-NNNN belongs to the MST Synchronous Torque Motors series from Bosch Rexroth Indramat. It is supplied as a frameless stator intended for direct-drive rotary axes where high torque is required at comparatively low speed. By coupling directly to the load, the unit removes belts or gear stages, which supports tighter positioning and lower maintenance in indexing tables, extruders, and other continuous-duty automation equipment.

Under continuous duty, the stator produces 375.0 Nm while operating at a shaft speed of 180 rpm. At this operating point, the phase current is limited to 20.0 A, yielding a mechanical output of 7.10 kW. Twenty-five pole pairs generate a dense magnetic field that helps keep rotation smooth at very low electrical frequencies. Dynamic response is influenced by a winding inductance of 18.2 mH, and copper losses correspond to a 2.25 Ω phase resistance measured at 20 °C. The back EMF increases with speed according to a voltage constant of 1.930 V min⁻¹, so the drive must supply matching voltage as operating speed rises. These values describe the electrical behavior and continuous thermal load of the stator during operation.

During short overloads, the machine shaft can withstand up to 900.0 Nm, and the rotor may accelerate to 330 rpm before field weakening becomes necessary. At these limits, the stator dissipates 2.70 kW, so liquid cooling is required and the housing must receive 6.0 L/min of coolant at no more than 3.0 bar inlet pressure to keep winding temperature stable. Electromagnetic conversion is expressed by a torque constant of 18.80 Nm/A, which supports precise force control through current regulation. Despite this capability, the stator mass remains only 23.0 kg, which helps when integrating the motor into compact machine frames. The drive and cooling system must be matched to the motor's torque, speed, and heat load.