Bosch Rexroth | A10VSO71DFR131R-VPA42N00
A10VSO71DFR1/31R-VPA42N00
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The A10VSO71DFR1/31R-VPA42N00 pump is manufactured by Bosch Rexroth as part of the A10VSO Variable Pumps series. It serves hydraulic automation tasks by converting mechanical drive power into an adjustable flow of pressurized fluid. Its displacement per revolution is 71 cm³, so each shaft turn moves that volume into the circuit. When the shaft runs at 1 800 rpm and the displacement is at maximum, the flow reaches 128 l/min, and at the nominal speed rating the pump can deliver 156 l/min to satisfy higher actuator demands. A power draw of 73 kW at nominal speed and a 280 bar pressure difference shows the energy level that must be supplied by the prime mover. To generate this output the shaft transmits 316 Nm of torque. Acceptable mechanical loading is bounded by a 2 400 N axial force and a 1 900 N radial force on the shaft, while the highest continuous speed permitted at full displacement is 2 200 rpm.
When displacement is reduced, the pump speed may rise to 2 600 rpm, giving a wider control range for variable-flow operation. The internal pressure control can be set as high as 280 bar, and the main pressure port withstands 350 bar so the outlet can handle peak system loads. The pilot port also tolerates 350 bar, which allows a high-pressure control signal without risking damage; the same port is threaded 7/16-20 UNF-2B to accept standard fittings. Case drainage must remain below 2 bar to protect internal seals, and the drain connection is cut to 7/8-14 UNF-2B for easy hose attachment. The suction port admits up to 10 bar, preventing inlet cavitation while accommodating moderately pressurized reservoirs. Together these limits define safe operating boundaries and connection details for integration into closed-loop or open-loop hydraulic systems.
Technical Specifications
Displacement Per Rev
71 cm3
Drain Port Max Pressure
2 bar
Drain Port Thread
7/8-14 UNF-2B
Flow At 1800 Rpm, Vg Max
128 l/min
Max Axial Shaft Force
2400 N
Max Flow At Nnom, Vg Max
156 l/min
Max Power At Nnom (Δp 280 Bar)
73 kW
Max Radial Shaft Force
1900 N
Max Speed (reduced Vg)
2600 rpm
Max Speed At Vg Max
2200 rpm
Pilot Port Max Pressure
350 bar
Pilot Port Thread
7/16-20 UNF-2B
Pressure Control Max Setting
280 bar
Pressure Port Max Pressure
350 bar
Suction Port Max Pressure
10 bar
Torque At Δp 280 Bar, Vg Max
316 Nm
1620 Old Apex Road
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