Bosch Rexroth | AA10VSO71DFR131R-PKC94K01-SO128
AA10VSO71DFR1/31R-PKC94K01-SO128
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The AA10VSO71DFR1/31R-PKC94K01-SO128 variable pump is part of the A10VSO Variable Pumps series from Bosch Rexroth and supplies adjustable hydraulic flow for automated machinery. Each revolution moves 4.33 in³ of fluid, establishing the basic delivery volume that the drive motor must supply. A nominal pressure limit of 4,100 psi defines continuous working capability, while a 5,100 psi peak rating permits brief overloads without damage. Driving the pump at nominal pressure and full displacement requires 233 lb-ft of torque, so the prime mover can be sized accurately. When the shaft turns at rated speed, output reaches 41.2 gpm, giving designers a reference point for circuit sizing. The unit may spin up to 2,200 rpm at full stroke, which protects internal components from excessive peripheral velocity. A 2 in suction port following ISO 6162-1 ensures unrestricted inlet flow, and maintaining at least 12 psi absolute at this connection prevents cavitation.
At the more common motor speed of 1,800 rpm the pump supplies 33.8 gpm, allowing lower-speed power units to meet system demand. A maximum flow deviation of 0.70 gpm keeps volumetric efficiency within tight bounds for repeatable actuator motion. The compensator is set to react at a 200 psi differential so pressure control loops can be tuned accordingly. Suction line pressure may climb to 145 psi absolute without harming seals, whereas housing drainage must stay below 30 psi absolute to avoid bearing load. If the displacement is reduced, the shaft can accelerate to 2,600 rpm, expanding the usable speed range for variable-speed drives. System pressure exits through a 1 in ISO 6162-1 port that matches common high-pressure fittings, and a 7/16-20 UNF pilot port accepts remote control lines for pressure and flow regulation.
Technical Specifications
Differential Pressure Setting
200 psi
Displacement
4.33 in³/rev
Flow At 1800 Rpm, Vg Max
33.8 gpm
Flow At Nnom, Vg Max
41.2 gpm
Flow Deviation Δqv Max
0.70 gpm
Max Case Drain Pressure (abs)
30 psi
Max Inlet Pressure (abs)
145 psi
Max Speed (vg<vg Max)
2600 rpm
Max Speed At Vg Max
2200 rpm
Min Inlet Pressure (abs)
12 psi
Nominal Pressure
4100 psi
Peak Pressure
5100 psi
Pilot Port Thread
7/16-20 UNF
Pressure Port Size
1 in (ISO 6162-1)
Suction Port Size
2 in (ISO 6162-1)
Torque At 4100 Psi, Vg Max
233 lb-ft
1620 Old Apex Road
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