Product Description:

The MST290E-0004-FT-N0SN-NNNN is a permanent-magnet synchronous torque motor produced by Bosch Rexroth Indramat within the MST Synchronous Torque Motors series. Delivered as a frameless stator, it mounts directly to a machine structure and supplies low-speed, high-torque rotation for indexing tables, extruders, or similar drive axes that avoid additional gear stages. Its direct-drive layout reduces transmission compliance and supports accurate rotary motion in applications that require smooth torque delivery.

During continuous operation, the motor supplies a rated torque of 575 Nm at a shaft speed of 40 rpm, establishing its nominal working point. At that condition, it yields mechanical power of 2.40 kW while drawing 12.5 A from the inverter. Torque rises proportionally with current through a constant of 46.00 Nm/A. Thermal energy is extracted by water cooling; the stainless jacket is 195 mm long, measures 310 mm in outside diameter, and requires a coolant flow of 9.0 l/min to keep winding temperature within limits. The jacket arrangement leaves the windings exposed, so the stator must be enclosed by the host machine for mechanical support and safety.

The motor can handle dynamic peaks up to 1150 Nm, and reaching this overload point may demand as much as 50.0 A of phase current. Electrical behavior is influenced by a winding inductance of 49.5 mH and a resistance of 8.2 Ω, which shape current ripple and affect servo-drive tuning. With a stator mass of 25.1 kg, mounting hardware must support both weight and radial forces. The protection rating is limited to IP00, meaning live parts are unguarded against dust or accidental contact, so the motor must be installed in a protected housing. Adequate coolant circulation helps limit winding temperature during repeated peak-torque cycles.