AA10VSO71DRG/31R-VPA42K01

The AA10VSO71DRG/31R-VPA42K01 axial piston pump belongs to the A10VSO Variable Pumps series and is produced by Bosch Rexroth for hydraulic automation systems requiring adjustable flow delivery. It features a displacement of 71 cm³ per revolution, allowing proportional volume changes in response to swash-plate adjustment. Under continuous duty the unit withstands a nominal pressure of 280 bar, while peak pressure up to 350 bar covers transient overload events. When set to its maximum geometric displacement it reaches 2200 rpm, generating a flow of 156 L/min at that speed. With reduced displacement permitted by the variable design, rotational speed can increase to 2600 rpm to satisfy higher cycle frequencies without exceeding peripheral velocity limits. At 280 bar the pump delivers 73 kW of hydraulic power and 316 Nm of torque, supporting medium-size drives in presses and machine tools. Clockwise shaft rotation is specified, so system plumbing and motor selection must match this direction. Case-drain pressure may not exceed 2 bar, a value intended to protect shaft seals and bearing lubrication circuits. The allowed fluid temperature peaks at 110 °C to maintain viscosity and prevent cavitation during extended operation.

Reliable suction is maintained when the inlet absolute pressure stays above 0.8 bar, so reservoir design and line sizing must avoid excessive vacuum. The suction port is a 2 in SAE J518 flange, chosen to keep inlet velocity low at high flow rates. Discharge is handled through a 1 in SAE J518 pressure port, providing a standard interface to main circuit piping. Control oil is routed to the 7/16-20 UNF-2B pilot port, which mates with common high-pressure fittings for remote displacement commands. The pump weighs 38 kg with a through-drive arrangement installed, allowing further pumps or auxiliary devices to be mounted in series without additional couplings. Through-drive capability lets a secondary pump share the same prime mover, conserving installation space. The compact mass supports mobile equipment frames that impose strict weight limits. Standard flange dimensions align with SAE mounting patterns, simplifying direct replacement within existing hydraulic manifolds.