Product Description:

The MRS142D-1N-0058-NNNN is a synchronous rotary motor produced by Bosch Rexroth Indramat for the MRS Synchronous IndraDyn H Motors series. In industrial automation, it converts drive current into precise shaft motion. This allows coordinated positioning or constant-speed rotation in machine tools, handling modules, and packaging equipment. Its synchronous design supports accurate speed regulation and repeatable motion when paired with a compatible drive.

For mechanical integration, the rotor is fixed to the shaft by a Shrink Fit process that eliminates backlash and retains concentricity under high acceleration. Dynamic balance is trimmed with 8x M6x6 + 8x M6x8 threaded pins positioned around the hub; this pattern allows residual imbalance to be corrected after coupling components are added. Torque is generated by an array of Inner Permanent Magnets that interact with the stator field, delivering high power density without external magnet protection. Electromagnetic commutation follows 4 pole pairs, a configuration that sets the electrical frequency needed for a given mechanical speed and influences output ripple. The rotor seats on a shaft with a 58 mm inner diameter, and mounting to surrounding hardware is done through a smooth-hole flange that accepts locating keys or custom sleeves.

Inertial characteristics influence servo loop tuning, and the rotor’s mass moment is 0.014 kg·m², balancing responsiveness with load stability. A total rotor weight of 7.2 kg helps keep bearing loads moderate while adding thermal capacity. Continuous operation is limited by material temperature; magnet and sleeve integrity are maintained up to 145 °C, and demagnetization safety begins at 135 °C, so the drive should reduce current as those limits are approached. When the spindle housing is liquid-cooled, the design permits coolant entry temperatures down to -20 °C, helping stabilize core heat in cold-room or high-duty installations without exceeding the stated rotor thresholds.