Product Description:

The MST530D-0012-FH-N0KR-NNNN torque motor is produced by Bosch Rexroth Indramat within the MST Synchronous Torque Motors series. As a direct-drive rotary unit, it mounts to machine tables or extruders to deliver high continuous torque without intermediate gearing, simplifying layouts in heavy-duty automation or plastics processing. Its housing with an integrated cooling jacket supports liquid cooling so the stator windings remain within their thermal limits during continuous slow-speed operation.

At its continuous operating point, the motor supplies 21.10 kW of mechanical output while turning at a rated speed of 120 rpm. That speed pairs with a rated torque of 1680 Nm, enabling constant low-speed torque for indexing or compounding drives. The stator draws a rated current of 47.2 A, which helps size the upstream inverter and cabling, and the torque constant of 35.59 Nm/A indicates how much shaft torque is produced for each ampere of current. A cooling circuit moves 7.0 L/min of water-glycol through the jacket, and liquid cooling removes losses more effectively than air while keeping winding temperatures stable. Electrical power reaches the windings through a terminal box, and 10.0 mm² conductors are used for the three-phase supply.

When the load demands acceleration, the motor can be driven up to a maximum speed of 170 rpm and may accept a peak phase current of 156.4 A. Under those short-term conditions, the shaft can deliver 3760 Nm of torque, giving a wide overload margin for startup or intermittent shock loads. At zero speed, it develops 1920 Nm of standstill torque while drawing 53.8 A, allowing precise holding without a mechanical brake even though no encoder is mounted. The encapsulated housing with a cooling jacket directs coolant around the stator core, and the absence of internal feedback means an external position transducer is required for closed-loop control.