Product Description:

The MRT290F-3N-0200-NNNN is a rotor element produced by Bosch Rexroth Indramat for the MRT Synchronous IndraDyn T Motors series. Classified as the rotor of a torque motor from the MBT series, it is intended to pair with a stationary stator to create direct-drive torque in indexing tables, print cylinders, and similar precision axes. By removing gear stages, the component allows high torque at zero speed and accurate position control, making it useful in industrial automation tasks that demand smooth, continuous rotation without mechanical backlash.

This rotor matches mechanical frame size 290, and its laminated core forms an internal bore of 200 mm for the stator iron. The rotating mass produces a moment of inertia of 0.2 kg·m², so drive controllers must supply the corresponding acceleration current when rapid speed changes are required. Torque is transmitted to the load through a hub that is fastened by screws, a method that resists cyclical torsion without relying on shrink fits. Because the assembly is open on all sides, it carries a protection level of IP00, meaning the motor must be built into a guarded machine frame to prevent contact with live parts.

Operational limits focus on temperature management and liquid cooling. The rotor may operate in ambient air from 0 to +40 °C; outside this range, its magnetic properties and bearing grease life are not guaranteed. For warehouse storage, it tolerates temperatures from -25 to +55 °C, and it can withstand shipping temperatures from -25 to +70 °C without degradation. When paired with a water-cooled stator, the inlet fluid should remain between +5 and +40 °C, and the installation piping must limit static pressure to 6 bar. The standard version is supplied with pre-machined screw holes, allowing the rotor to be aligned accurately before final balancing.