Product Description:

The MHD090B-058-NG1-UN is a servo motor produced by Bosch Rexroth Indramat for the MHD Synchronous Motors series. It is intended to drive axes that require coordinated speed and torque control in automated machinery and transfer lines. The motor combines closed-loop feedback with an efficient cooling arrangement so motion controllers can command precise rotary positioning in continuous-duty applications. This makes it suitable for indexing tables, feed axes, and handling systems that must maintain stable motion under changing loads.

This motor delivers a continuous standstill torque of 12.0 Nm and has an IP65 enclosure that protects against dust and water jets. A 140 mm square flange and a 110 mm centering diameter align the plain shaft to gearboxes or couplings without extra adapters. Liquid cooling removes heat from the stator, allowing full torque at nominal current while keeping the windings within their permitted temperature range. Position data are generated through an optical digital servo feedback system in HSF format with relative position detection, and it contributes to a system accuracy of ± 0.5 angular minutes. The motor uses size 090 and length code B, and it has separate power and feedback connectors. The power plug can be turned through 270° to simplify cable routing, while winding code 058 identifies the electrical characteristics used for this frame.

The motor is equipped with a holding brake that supplies 11.0 Nm of static torque for vertical or indexed loads, and the brake is released electrically through the same connector set. That brake supports load retention when the axis is stopped and main drive torque is removed. Continuous operation is supported between 0 to 40 °C, while storage or transport can occur between -20 to +80 °C without harming the magnetic or insulation materials. The windings use thermal class F, and the assembly may be installed up to 1000 m above mean sea level without derating. A shaft seal is fitted on the plain shaft to help prevent coolant or lubricant ingress, and the optical feedback system supports repeatable alignment during setup.