Product Description:

The MST290E-0018-FT-N0SN-NNNN is a synchronous torque motor produced by Bosch Rexroth Indramat within the MST Synchronous Torque Motors series. Designed for direct-drive rotary tables, extruders, and other low-speed, high-torque axes, the unit delivers continuous rotation without mechanical gearing. Its water-cooled housing uses a cooling jacket diameter of 310 mm and a length of 195 mm to extract heat at the stator. Thirty pole pairs in the rotor create the dense magnetic field needed for smooth torque generation, and wiring is accommodated through a 6.0 mm² power lead that matches typical cabinet terminals. This direct-drive layout helps reduce backlash and avoids the wear associated with intermediate gear stages.

At its continuous operating point, the motor supplies 563 Nm of rated torque while turning at a shaft speed of 240 rpm. This combination equates to 14.15 kW of rated power that can be delivered without exceeding thermal limits. To reach that operating point, the stator windings draw 34.3 A of rated current against a phase resistance of 1.5 Ω, and the back EMF rises according to a voltage constant of 1.037 V per min⁻¹. When the application demands short bursts, the motor can produce up to 1150 Nm of maximum torque with a peak phase current of 125 A before magnetic saturation appears. These values suit applications that need strong low-speed output during indexing, forming, or continuous process rotation.

The electrical design yields a torque constant of 16.40 Nm/A, so every ampere of drive current adds predictable rotary force. Dynamic response is balanced by a winding inductance of 8.9 mH, which helps filter current ripple from the inverter. Mechanical motion is limited to a top speed of 415 rpm, matching the relatively high pole count and keeping magnetic losses within the cooling system’s capacity. Because the frame carries an IP00 rating, the motor must be mounted inside a guarded machine housing where contamination and accidental contact are controlled. The open design makes proper enclosure integration important in installations where debris, coolant, or operator access could otherwise reach live or moving parts.