MHD112B-058
The MHD112B-058 is a brushless AC servo motor manufactured by Bosch Rexroth Indramat in the MHD Synchronous Motors series. It is intended for closed-loop motion axes, where the motor converts controlled drive current into shaft rotation for CNC machines, handling robots, and packaging equipment. This operating principle allows the connected drive to regulate torque and speed accurately during positioning, indexing, and synchronized machine movement. When paired with a compatible drive controller, the motor supports smooth acceleration, controlled deceleration, and stable position holding through repeated machine cycles.
The housing uses a 130 mm centering diameter, which provides a concentric pilot for accurate alignment to the machine frame. Its mounting face is based on a 192 mm square pattern, so clamping forces are distributed evenly across the flange and the motor fits equipment built for this footprint. During standstill, the motor can sustain a continuous torque of 28.0 Nm without exceeding its thermal limit. This makes it suitable for axes that must hold a load at zero speed during process dwell periods or controlled vertical positioning. Accurate flange alignment also helps reduce coupling stress and supports consistent shaft runout in precision assemblies.
The motor has length code B, which indicates a mid-length stator package within this frame family. Its frame size is 112, which sets the external housing dimensions and shaft height used for installation. The winding code 058 identifies the electrical characteristics expected by the matching drive, including the voltage constant and rated current. Within the same mechanical envelope, the selected winding affects how the motor responds to the applied voltage and how much current is required for a given torque level. That relationship helps the axis maintain predictable current control, steady speed regulation, and consistent servo response during normal operation.
