MHD071B-061-PP2-UN/SA003 by Bosch Rexroth Indramat

The MHD071B-061-PP2-UN/SA003 is a servo motor manufactured by Bosch Rexroth Indramat and belongs to the MHD Synchronous Motors series. As a rotary actuator for industrial automation, it converts drive current into controlled mechanical torque and speed, enabling precise positioning and velocity regulation in packaging lines, machine tools, and material-handling axes. Its integrated digital feedback allows closed-loop control so the drive controller can monitor the shaft angle without external sensors.

Electrically, the motor's characteristic speed of 4500 rpm marks the point where back EMF equals the supply, while a continuous standstill torque of 8.0 Nm permits static load support. Winding code 061 has 7.2 mH of inductance and 1.45 ? resistance at 20 °C, and these values affect current rise time and copper loss. A torque constant of 0.77 Nm/A links stator current to produced torque, and the drive may draw up to 50.5 A during accelerations. The encoder sends absolute position data beyond 4096 revolutions through digital servo feedback. The voltage constant of 70.0 V/1000 rpm links speed to generated EMF, and the IP65 housing resists dust and spray. Liquid cooling removes heat. The connector rotates 270°, accepts 1.0 mm² conductors, and combines power with feedback lines.

Mechanically, the motor delivers a theoretical peak torque of 32.0 Nm for short overloads, supported by a frame that weighs 8.8 kg. The keyed shaft is sealed, and a 6.5 Nm holding brake secures the load when power is removed. A centering diameter of 95 mm mates with a 115 mm square flange for repeatable alignment. Rotor inertia of 8.7 × 10?4 kg·m² balances fast acceleration with stable running, while the 071 frame code and length B keep the unit compact. The shaft seal keeps contaminants out of the bearing chamber and helps maintain lubricant integrity.