This pump is part of the A10VSO Series 31 family of axial‑piston swash‑plate pumps from Bosch Rexroth, used where variable flow and pressure control are needed without complex closed‑circuit hardware. The “71” in the code indicates the nominal geometric displacement of 71 cm³ per revolution, giving a high‑flow hydraulic output suitable for medium‑power actuators, presses, and extruders operating at up to 280 bar nominal pressure (with 350 bar peak). The DRG control type uses a remotely operated 1‑stage pressure controller that allows system pressure to be set from an external pilot signal or mechanical adjustment, enabling load‑sensitive or demand‑based operation.
Mechanically, the unit is a flanged shaft‑driven axial‑piston pump with a SAE‑type mounting flange and code‑61 suction and pressure ports, plus case‑drain ports for internal leakage return. The Series 31 design emphasizes compactness, short control time, and versatility, with a through‑drive option that allows a gear pump or second axial‑piston pump to be mounted on the same input shaft for auxiliary circuits. The pump is typically driven by an electric motor or engine at standard industrial speeds, and its high‑power‑density swash‑plate mechanism gives smooth, low‑pulsation flow for precise hydraulic control. Typical applications include CNC machine hydraulics, plastic‑molding machines, metal‑forming equipment, and mobile work machines.
