Product Description:

The MRT210D-3N-0120-NNNN is a frameless synchronous torque motor built by Bosch Rexroth Indramat and released within the MRT Synchronous IndraDyn T Motors series. Supplied as a rotor-stator kit, it is integrated directly into rotary axes where eliminating gearboxes and belts reduces backlash and maintenance. By generating high continuous torque at low speed, the unit handles indexing tables, printing cylinders, and other precision positioning tasks common in industrial automation.

Its mechanical interface relies on a fastening pattern that uses M6 screws; this selection sets the bolt diameter and the torque values required when clamping the stator. The rotor is balanced for continuous operation up to 2500 rpm, establishing the maximum permissible speed before excessive centrifugal forces appear. Because the motor is supplied as an open kit motor, the surrounding machine housing must provide environmental sealing and heat conduction. The protection rating is IP00, confirming that no inherent enclosure shields the windings or magnets from dust or fluid. Dynamic performance is influenced by a rotor inertia of 0.027 kg·m², which affects how rapidly the axis can accelerate or decelerate under drive current.

The rotating element weighs 5.8 kg, so spindle bearings and lift mechanisms must accommodate that mass during assembly and service. Twelve equally spaced mounting points, identified by a thread count of 12, distribute clamping forces uniformly around the stator flange. Each tapped hole extends to a depth of 14 mm, giving sufficient engagement length for the specified screw size without breaching the coil cavity. Threaded engagement is available on both sides of the laminations, letting builders attach a thermal plate on one face while securing the motor to the machine frame on the opposite face to simplify heat management and structural alignment.