MHD115B-058-PG1-RA Bosch Rexroth Indramat
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MPN: R911287429
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The Bosch Rexroth Indramat MHD115B-058-PG1-RA is a servo motor from the MHD Synchronous Motors series. It features a flange size of 192 mm, a centering diameter of 180 mm, and is equipped with natural convection housing cooling. This motor provides 50.0 Nm of continuous torque at standstill, has a plain shaft with a shaft seal, and includes a holding brake with a torque of 70.0 Nm.
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Product Description:
The MHD115B-058-PG1-RA is a servo motor manufactured by Bosch Rexroth Indramat within the MHD Synchronous Motors series. Designed for closed-loop drive systems, the unit converts inverter power into precise torque and speed for positioning tables, gantries, and material-handling axes. Its encoder interface and integrated brake support controlled motion with compatible Indramat digital drives, and the motor is suited to applications that require stable position holding between commanded moves. Because it is intended for servo duty, the motor can respond quickly to current commands and maintain smooth rotation at low and moderate speeds. This makes it useful on automated equipment where repeatable starts, stops, and directional changes are part of normal operation.
Mechanically, the motor mounts through a centering diameter of 180 mm and a square flange measuring 192 mm, providing rigid alignment to gearboxes or machine frames. At standstill, it delivers 50.0 Nm of continuous torque, and heat produced by copper losses is removed by natural convection, so no external blower is required. Power conductors terminate on a right-hand power connector, which helps separate motor power wiring from signal leads and can simplify cable routing in compact cabinets. The size 115 frame with B length gives the motor a larger active section than shorter versions in the same family, while an internal shaft seal helps limit the entry of dust and oil. Rigid mounting also helps preserve alignment during reversing loads and repetitive indexing cycles.
Position feedback is supplied by a digital servo encoder with Absolute (>4096 revolutions) capability, so multi-turn position data remains available across power cycles. The stator uses winding code 058, which matches the electrical characteristics expected by the associated drive parameters. A factory-installed holding brake provides 70.0 Nm of static torque to secure vertical or suspended loads when power is removed, and the brake releases electrically during normal operation. The output uses a plain shaft, which suits clamp-style couplings and helps reduce backlash introduced by keyed connections. This encoder and brake arrangement supports axes that must hold position securely after a stop and recover position information at startup.
