Bosch Rexroth | AA10VSO71DR31R-PRA12KD3
AA10VSO71DR/31R-PRA12KD3
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The AA10VSO71DR/31R-PRA12KD3 pump is part of the A10VSO Variable Pumps series produced by Bosch Rexroth for closed-loop hydraulic automation. It provides a geometric displacement of 71 cm³ per revolution to meter fluid volume accurately in variable flow circuits. At maximum displacement the pump delivers 156 L/min when driven at nominal speed, supporting medium to large actuator groups. A nominal pressure rating of 4100 psi supplies consistent force during continuous duty, while 73 kW is drawn at 280 bar to match typical industrial power packs. Clockwise rotation is specified, and intake flow enters through a 2 in ISO 6162-1 suction flange. Reliable feeding is maintained with a minimum absolute inlet pressure of 12 psi, and shaft speed is limited to 2200 rpm when operating at maximum displacement.
The housing volume of 1.6 L contains internal leakage oil and balances case pressure to protect seals. Excess fluid is routed to tank through a 7/8-14 UNF-2B drain port for simple return-line plumbing. With displacement reduced, allowable speed climbs to 2600 rpm to support faster duty cycles without cavitation. The pump tolerates peak events up to 5100 psi, and a moment of inertia of 0.0083 kg·m² stabilizes shaft dynamics during rapid load changes. Output torque reaches 316 Nm at 280 bar, supplying high mechanical drive to downstream components. Pressure flow exits via a 1 in ISO 6162-1 working port flange, and the flange is secured by a 3/8-16 UNC-2B fastening thread to integrate with manifold blocks or pipe adapters.
Technical Specifications
Case Volume
1.6 L
Drain Port Thread
7/8-14 UNF-2B
Flow At Nominal Speed (vg Max)
156 L/min
Geometric Displacement
71 cm3/rev
Max Speed At Reduced Vg
2600 rpm
Max Speed At Vg Max
2200 rpm
Maximum Pressure
5100 psi
Min Inlet Pressure (abs)
12 psi
Moment Of Inertia
0.0083 kg*m^2
Nominal Pressure
4100 psi
Power At Nominal Speed (280 Bar)
73 kW
Rotation Direction
Clockwise
Suction Port Flange
2 in (ISO 6162-1)
Torque At 280 Bar
316 Nm
Working Port Fastening Thread
3/8-16 UNC-2B
Working Port Flange
1 in (ISO 6162-1)
1620 Old Apex Road
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