Product Description:

Bosch Rexroth Indramat manufactures the MHD115A-058-NG0-AA as part of the MHD Synchronous Motors series. The product is a servo motor intended for closed-loop axis control in industrial automation where precise speed and position regulation are required. Within the naming code, the motor is classified as size 115 with length A and winding code 058. It uses a plain shaft interface and is supplied without a holding brake, which suits installations that already use external load-holding hardware. The plain shaft also allows torque transmission through clamp-style couplings without a keyed connection.

The motor delivers a continuous standstill torque of 32.0 Nm, giving the drive train sufficient holding force while remaining within thermal limits. It can be operated throughout an ambient range of 0 to 40 °C, so the surrounding air must stay inside that window. The stator housing is rated IP65 to resist dust and low-pressure water jets, while heat is removed only by natural convection, eliminating the need for forced-air accessories. Position feedback is provided through Digital servo feedback (HSF), allowing the controller to sample incremental signals with high resolution. Power and signal cables exit on side A through an output connector, which helps keep cable routing straightforward in inline machine layouts.

The mechanical interface uses a centering diameter of 180 mm and a square flange of 192 mm. The centering shoulder positions the motor on the machine frame, while the flange provides a broad mounting surface for bolting. Closed-loop accuracy reaches ± 0.5 angular minutes, and insulation class F materials tolerate winding temperatures up to 155 °C. The motor may be stored between -20 and +80 °C and mounted up to 1000 m above mean sea level without performance derating. Position sensing relies on relative optical measurement, and a shaft seal helps limit ingress during washdown cycles.