AA10VSO28DFR/31R-VKC62K01

The AA10VSO28DFR/31R-VKC62K01 variable displacement pump is built by Bosch Rexroth for the A10VSO Variable Pumps series. It supplies hydraulic power in automation circuits by altering the swashplate angle to match load requirements. A displacement of 28 cm³ per revolution sets the theoretical volume moved each shaft turn, allowing predictable sizing in medium-flow systems. At 1800 rpm the unit delivers 50 L/min, a rate that supports common machine tools and mobile functions. Continuous duty is permitted up to 280 bar, while a peak rating of 350 bar covers brief pressure surges without damage. A case volume of 0.7 L maintains an oil reserve for internal cooling and bearing lubrication. The ISO 3019-1 mounting flange simplifies integration with standard SAE bell housings. A low moment of inertia of 0.0017 kg·m² reduces start-up torque demand on the prime mover. When specified without a through-drive, the pump weighs 18 kg, so a single technician can handle installation inside compact power-unit frames.

System designers can obtain up to 84 L/min when the pump runs at its maximum swashplate setting, giving headroom for actuators that experience intermittent high demand. Shaft speed capability reaches 3000 rpm at full displacement and increases to 3600 rpm when the swashplate is reduced, which widens the usable operating map for variable-speed drives. Two drain ports are provided so the housing can be vented from either side of the manifold, easing hose routing in confined cabinets. Output torque rises to 125 Nm at the 280 bar nominal pressure, and the shaft resists a maximum through-drive torque of 145 Nm, allowing secondary pumps to be coupled inline. A torsional stiffness of 26189 Nm/rad limits angular wind-up, preserving servo accuracy in closed-loop systems. With a through-drive adapter fitted, overall mass increases to 19.3 kg, a factor to consider for bracket sizing. These characteristics ensure the pump supports responsive, efficient hydraulic automation without exceeding typical drive-train limits.