SRMCR5D680L50Z32A0M1L12

The SRMCR5D680L50Z32A0M1L12 motor is manufactured by Bosch Rexroth and is part of the MCR Radial Piston Motors series. It converts hydraulic energy into rotational motion for industrial drives where precise low-speed control is required. A displacement of 680 cm³ per revolution establishes the flow rate needed to reach set speeds, and a specific torque of 11 Nm per bar allows designers to predict output torque from supply pressure. It delivers up to 3000 Nm, giving high breakaway force for winches or slew drives. The 50 mm drive shaft diameter matches large couplings while maintaining rigidity under full load. Installation uses a front case square flange so the housing bolts directly to the machine frame. The unit works in single-speed mode, eliminating shifting components and simplifying control loops. There is no through shaft, confining power transmission to the main shaft and easing sealing arrangements. The assembly weighs 39 kg, a factor when selecting mounting hardware and service tools.

Minimum continuous rotation begins at 0.5 rpm, enabling creeping movements without cogging, while maximum speed reaches 265 rpm to cover typical travel ranges in hydraulic circuits. The design tolerates a differential pressure of 400 bar across the motor and admits port pressures up to 420 bar, so full performance can be applied in high-pressure systems. Case drain flow returns to tank through a 3/4-16 UNF thread, and case pressure must stay below 10 bar to protect shaft seals. Working ports A and B use 1 1/16-12 UNF threads, giving consistent connection sizes for supply and return hoses. NBR sealing elements isolate the internal fluid from the environment and maintain compatibility with standard mineral oils. These pressure ratings let the motor withstand repeated shock loads in mobile or marine duty cycles, and the speed window supports both slow positioning and moderate travel drives without gearboxes.