Product Description:

The MST161C-0140-FT-N0CN-D303 is a frameless synchronous torque motor segment built by Bosch Rexroth Indramat and assigned to the MST Synchronous Torque Motors series. The component is intended for direct integration into rotary tables, extruders, or print rollers, where it delivers low-speed, high-torque motion without mechanical transmissions. Because it becomes part of the machine assembly rather than using a separate motor housing, it can reduce backlash, coupling compliance, and packaging bulk. This format is useful where compact radial space and precise rotary synchronization are more important than a self-contained motor housing.

Within its laminated stator, the three-phase winding is rated for 52.0 Nm when operated at a rated speed of 1400 rpm. At that operating point, the electromagnetic package delivers 7.60 kW while drawing a thermal rated current of 17.4 A. During short load peaks, the motor can develop up to 160 Nm, and continuous copper losses are limited to 1.35 kW for heat-sink sizing. Momentary line current can reach 19.2 A at standstill, which is useful during brief overload events before thermal limits become dominant. Electrical behavior is characterized by 2.0 Ω phase resistance at 20 °C, a 0.204 V/rpm voltage constant, an electrical leakage capacitance of 5.6 nF, and a maximum electrical speed of 1900 rpm.

The thermal mass is modest, reaching its winding limit in 2.0 minutes, so forced cooling or duty-cycle control may be required during extended high-current intervals. At zero speed, the magnetic circuit produces 65 Nm, and torque rises with current according to a constant of 3.25 Nm/A. For rapid indexing, the drive can tolerate supply peaks up to 53.0 A without demagnetization, while the phase inductance of 10.6 mH helps moderate current rise during abrupt command changes. As a frameless segment, it is intended to operate as part of the surrounding machine structure rather than as a standalone housed motor.