Bosch Rexroth | AA10VO71DFR131R-PSC92N00-SO52
AA10VO71DFR1/31R-PSC92N00 SO52
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The AA10VO71DFR1/31R-PSC92N00 SO52 pump belongs to the A10VSO Variable Pumps series and is produced by Bosch Rexroth for variable displacement tasks in hydraulic automation. Its displacement is 71 cm³ per revolution, setting the volume of oil moved during each shaft rotation. A nominal pressure rating of 280 bar defines the continuous working limit on the pressure port. The shaft can run up to 2200 rpm at maximum displacement, providing flexibility for standard duty cycles. At 1800 rpm it delivers a flow of 128 L/min, matching common prime-mover speeds. Fluid travels from port S to port B, supporting circuit layouts that follow this direction. An absolute inlet pressure limit of 30 bar protects the suction side against cavitation. The internal case volume of 1.6 L holds leak oil and balances thermal expansion within the housing.
The pump tolerates peak pressure up to 350 bar for short overload events. When driven at its permitted top speed it can supply 156 L/min, covering high demand moments. The speed ceiling rises to 2600 rpm when the displacement is reduced, extending the usable operating range. Case drain pressure must stay below 2 bar absolute to avoid seal overload. Rotor inertia is 0.0083 kg·m², influencing acceleration and deceleration times of the drive train. A rotary stiffness of 82112 Nm/rad helps minimize torsional oscillation between the prime mover and the pump. Output torque reaches 316 Nm at the nominal pressure, quantifying the mechanical load on the shaft. There is no through drive interface, so the pump cannot directly mount auxiliary units. The bare unit weighs 35.2 kg, which determines handling and support requirements during installation.
Technical Specifications
Case Drain Pressure, Abs Max
2 bar
Case Volume
1.6 L
Direction Of Flow
S to B
Displacement Per Rev
71 cm3/rev
Flow At 1800 Rpm
128 L/min
Inlet Pressure, Abs Max
30 bar
Max Flow At Max Speed
156 L/min
Max Speed At Reduced Vg
2600 rpm
Max Speed At Vg Max
2200 rpm
Moment Of Inertia
0.0083 kg·m²
Nominal Pressure
280 bar
Peak Pressure
350 bar
Rotary Stiffness Kc
82112 Nm/rad
Through Drive
None (N00)
Torque At 280 Bar
316 Nm
Weight (no Through Drive)
35.2 kg
1620 Old Apex Road
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