MHD131B-024
The MHD131B-024 servo motor is produced by Bosch Rexroth Indramat for the MHD Synchronous Motors series. It is a permanent-magnet, electronically commutated unit intended for closed-loop drive systems that require accurate positioning and repeatable speed control. In automated cells, the motor couples to planetary gearboxes, timing belts, or direct-drive couplings so that programmable logic controllers can translate digital commands into precise rotary motion. The rotor and stator arrangement support smooth torque production across a wide operating range, which helps the axis respond predictably to changes in command speed and load. Shared mechanical dimensions within the MHD family support installation in standard mounting layouts used across the series.
Its centering diameter is 250 mm, creating a broad pilot surface that aligns the stator housing concentrically with adjoining machinery. A continuous standstill torque of 48.0 Nm allows the shaft to support static loads for extended periods without exceeding permissible winding temperature. The rectangular flange follows a 260 mm bolt circle, enabling direct attachment to standard reducer or spindle faces. Length code B extends the magnetic core to increase copper fill and iron path, which adds thermal mass for sustained operation. Frame size 131 corresponds to the stator diameter used for this motor size and matches the mechanical envelope used in the series.
Winding code 024 corresponds to a turns-per-phase ratio suited to intermediate DC-bus voltages and moderate base speeds. As a servo motor, the unit uses encoder feedback for real-time control, allowing the drive to generate sinusoidal current profiles without additional sensors. The machined shoulder serves as the centering interface, while the square bolt circle provides the flange pattern; these features help maintain coaxial alignment between the rotor, bearings, and coupled load during rapid acceleration and deceleration. Stable alignment also helps reduce coupling runout and uneven bearing loading during repeated reversing motion.
