Product Description:

The MST210A-0027-FT-N0CN-NNNN torque motor is produced by Bosch Rexroth Indramat as part of the MST Synchronous Torque Motors series. This unit is a permanent-magnet synchronous stator intended to be integrated directly into the machine frame, forming a compact, gearless rotary axis. By eliminating belts or gearboxes, the motor delivers smooth, high-precision rotation required for indexing tables, extruder screws, and similar automation tasks that need constant torque at low speed. Its design targets applications where space is limited yet high continuous torque density is critical for throughput.

A closed cooling jacket surrounds the windings and circulates coolant; this liquid cooling arrangement removes heat without external fans and lets the stator sustain the rated load. During short duty peaks, the phase conductors can carry 25.0 A, enabling acceleration up to 600 rpm while producing a stall torque of 100.0 Nm. Magnetic force is generated by an internal rotor that aligns with 20 pole pairs, so each electrical cycle produces fine angular resolution. The electromagnetic conversion efficiency is characterized by a torque constant of 7.10 Nm/A, meaning each ampere of stator current yields predictable rotary force. A winding inductivity of 53.3 mH moderates current ripple and supports smooth servo control at low frequencies.

Under continuous operation, the motor draws 7.0 A to deliver its rated shaft output of 1.40 kW at 270 rpm, corresponding to a mechanical torque of 50.0 Nm. Thermo-encapsulation surrounds the copper coils to resist thermal cycling, and an epoxy barrier seals the laminations against coolant ingress. The stator package weighs 7.2 kg, allowing direct mounting without heavy support structures. Electrical connection code CN uses a plug-in terminal set placed on the front face for straightforward cable connection. A winding resistance of 11 Ohms and a voltage constant of 0.510 V min⁻¹ determine the drive voltage required for field-oriented control.