Product Description:

Bosch Rexroth Indramat manufactures the MHD090B-058-PP1-UN, a servo motor in the MHD Synchronous Motors series that drives actuators, gantries, and machine-tool axes in closed-loop automation. The unit is identified by motor size 090, the B length code, and winding code 058, placing it in the medium-inertia, medium-power range of the platform. As a dedicated motion element, it converts drive current into rotary torque while maintaining the position accuracy required for coordinated multi-axis tasks on production lines. This operating profile supports precise interpolation, rapid positioning, and smooth speed regulation when the motor is paired with a compatible drive and feedback loop.

The frame is seated by a 110 mm centering diameter that helps keep the motor aligned with the machine interface, while the mounting pattern follows a 140 mm flange size. At standstill, the electromagnetic circuit can sustain 12.0 Nm of continuous torque, which supports holding force and low-speed operation without thermal overload. Heat generated in the stator is removed through liquid cooling, which supports higher current density and steadier thermal control than a self-cooled housing. Torque is transmitted through a keyed shaft, and a shaft seal is fitted to help keep contaminants away from the bearing area during operation.

A holding brake rated at 11.0 Nm provides passive load retention whenever the drive is disabled, which is useful on vertical axes and other applications that must resist movement at rest. Position feedback comes from digital servo feedback with an integrated multi-turn encoder that provides absolute resolution of more than 4096 revolutions, so the axis position is available immediately after power-up. The power connector can be rotated within a 270° window, and both power and feedback terminations use rotatable connectors to simplify cable routing in restricted spaces. The cooling passages in the housing help stabilize internal temperature during continuous duty, which supports consistent behavior from the brake and feedback components.