Product Description:

The MST210A-0027-FH-N0PU-NNNN is a synchronous torque motor section produced by Bosch Rexroth Indramat for the MST Synchronous Torque Motors series. It serves as a direct-drive motor for rotary tables, indexing heads, and similar automation axes where low-speed, high-torque output is required without mechanical gearing. Heat is removed through an internal liquid-cooling jacket that surrounds the stator, allowing the motor to maintain continuous duty. Mechanical mounting is handled by the RLS1200 flange socket, and a rotatable plug provides electrical access when the stator is integrated into the machine frame. Because the motor is used in a direct-drive arrangement, the load can be coupled to the axis without the backlash and wear associated with intermediate gear stages.

During continuous operation, the motor delivers 50.0 Nm while turning at a rated speed of 270 rpm. At that operating point, it converts electrical energy into 1.40 kW of mechanical power. The electromagnetic design yields a torque constant of 7.10 Nm/A, so commanded current directly sets output torque. A phase-to-phase winding inductance of 53.3 mH affects the inverter’s current-regulation bandwidth and should be considered when selecting a matching drive amplifier. These electrical characteristics support smooth torque response and stable motor control across normal operating conditions.

For short duty cycles, the rotor can tolerate momentary loads up to 100.0 Nm, and the mechanical limit permits acceleration to 600 rpm. Reaching these peaks draws stator current pulses as high as 25.0 A, while average thermal loading remains within the rated current level. Copper losses result from a phase resistance of 11 ohms, and the liquid-cooled housing removes the resulting heat from the stator assembly. Installation is supported by a rotatable plug that accepts 1.0 mm² power leads, while the cooling-jacket housing keeps the stator surfaces accessible for coolant plumbing. Because no encoder is included, any application that requires closed-loop positioning must use external feedback.