Product Description:

The MST360E-0008-FT-N0CN-D303 is a frameless synchronous torque motor produced by Bosch Rexroth Indramat in the MST Synchronous Torque Motors series. Intended for direct-drive rotary tables, indexing heads, and other low-speed axes, the motor supplies large continuous torque directly at the work shaft. Integrating the stator and rotor into the machine frame eliminates gear stages, reduces backlash, and supports closed-loop positioning duties in machining, printing, and automated assembly cells.

The unit delivers a rated shaft torque of 875 Nm while turning at a rated speed of 80 min⁻¹; these values correspond to a mechanical output of 7.30 kW. A torque constant of 41.67 Nm/A links current to torque, allowing full load to be reached at low frequency. For short overloads the shaft withstands up to 2000 Nm. Rated winding current is 21.0 A, and the inverter may supply 53.0 A during peaks. A coolant flow of 6.0 l/min circulates through the housing to evacuate losses. The wiring must use conductors with at least 2.5 mm² cross-section; the standard lead size corresponds to AWG 14. The back-EMF constant equals 2.560 V per min⁻¹, and the phase resistance at 20 °C is 4.67 Ω, both important for drive selection.

A standstill holding torque of 1050 Nm secures loads without mechanical brakes, while indexing moves can reach a maximum speed of 140 min⁻¹. The electromagnetic circuit shows an inductance of 39.9 mH, shaping current ripple and influencing servo loop bandwidth. Thermal mass is low; the windings reach steady-state temperature in 5.0 min, so any overload must be brief and followed by recovery time. These electrical and thermal characteristics, together with a voltage constant that matches high-resolution feedback, allow the motor to integrate tightly with Rexroth power modules for precise torque regulation across its full speed range.