Product Description:

The Bosch Rexroth Indramat MST530G-0007-FH-N0KR-NNNN is a water-cooled torque motor from the MST Synchronous Torque Motors series. It delivers direct rotational force to large machine shafts without intermediate gearing, so it is used in index tables, extruders, and press drives where constant low-speed torque and precise position control are required. This arrangement helps simplify the mechanical layout, improve accuracy, and reduce maintenance.

At its nominal operating point, the motor produces a continuous torque of 4200.0 Nm while turning at 70 rpm, yielding 31.00 kW of mechanical output. To hold this operating point, the drive supplies a phase current of 96.0 A. The electromagnetic design converts stator current into torque with a constant of 43.80 Nm/A, and the generated back EMF rises in proportion to speed at 3.650 V/rpm. These values set the power requirements of the drive controller and the available inverter voltage margin. Because the stator winding is water cooled, copper temperatures stay within limits during continuous duty. The rated point provides stable torque without relying on gearbox multiplication or cyclic duty derating.

For short bursts, the machine shaft can be driven to 9200.0 Nm with a supply of 305.0 A, and mechanical speed may reach 130 rpm before overspeed protection intervenes. Heat produced during such overloads is removed by a 2.00 L coolant jacket that uses a flow rate of 14.0 L/min, and the hydraulic circuit experiences only 0.2 bar of pressure drop, so pump demand remains low. Power cables sized at 2 x 16.0 mm^2 limit resistive loss, while the stator impedance is set by a 10.8 mH inductance and 0.9 ohm resistance. The cast housing weighs 204.0 kg, providing thermal mass that helps moderate temperature rise.