Product Description:

The MST210A-0027-FT-N0SN-NNNN is a low-speed, high-torque motor built by Bosch Rexroth Indramat for the MST Synchronous Torque Motors series. As a direct-drive element, it can be coupled straight to a spindle or rotary table, eliminating gearboxes in heavy-duty positioning stages and winding machines. Liquid cooling removes heat at the stator surface, while thermal encapsulation helps keep winding temperatures more uniform during load changes. An axial, small-diameter connector keeps the cabling footprint compact, and the motor is supplied without an integrated encoder so an external feedback device can be selected to match the motion system.

At its continuous operating point, the motor produces 50.0 Nm of shaft torque at 270 rpm, giving a mechanical output of 1.40 kW. The torque is generated with a phase current of 7.0 A, and each ampere contributes about 7.10 Nm/A because of the permanent-magnet design. A winding resistance of 11 Ω and an inductance of 53.3 mH help limit current ripple and support stable control of electromagnetic force. Heat buildup remains limited because the thermal time constant is only 2.4 minutes, which helps the motor respond well in applications with changing load periods. The axial connector also helps simplify cable routing in compact machine layouts.

For intermittent peaks, the current can rise to 25.0 A, allowing the rotor to deliver up to 100.0 Nm of torque. Speed is capped at 600 rpm, so the motor remains suited to direct-drive duties that favor torque over high rotational speed. The stator uses a winding inductance of 53.3 mH, which helps moderate current rise during rapid command changes from the inverter. A voltage constant of 0.510 V per rpm gives predictable back-EMF behavior, and the liquid-cooling circuit helps maintain consistent thermal conditions during sustained operation. This layout is well suited to rotary tables, indexing axes, and other applications that need smooth torque at low speed.