Bosch Rexroth | AA10VO28DFR52R-VRC64N00
AA10VO28DFR/52R-VRC64N00
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The AA10VO28DFR/52R-VRC64N00 axial piston pump belongs to the A10VSO Variable Pumps series from Bosch Rexroth and provides adjustable hydraulic power for automation loops. It employs DFR pressure/flow control so displacement changes automatically with system load. A geometric displacement of 28 cm³ per revolution determines the volume delivered per shaft turn, while a nominal pressure limit of 280 bar supports continuous service and a 350 bar peak pressure limit absorbs short overloads. Clockwise rotation matches standard engine drives, and the pump sustains 3000 rpm at full displacement or 3600 rpm when displacement is reduced, extending speed capability. When operating at 3000 rpm it can supply 84 L/min, giving moderate-sized machinery ample flow for rapid cycles.
Additional parameters refine circuit integration. A 14 bar differential pressure setting keeps compensator control stable as load varies. The inlet side accepts absolute pressures up to 30 bar to prevent cavitation, and case drain pressure must stay below 2 bar to protect internal seals. Flow deviation is limited to 1.0 L/min, maintaining predictable actuator motion. Ports follow SAE standards: the suction flange is 1 1/4 in, the pressure flange is 3/4 in, and pilot oil uses an X port threaded 7/16-20 UNF-2B, simplifying manifold design. The pump weighs 33 lb without fluid, allowing installation on mobile or compact power units without heavy lifting gear.
Technical Specifications
Case Drain Pressure Max
2 bar (29 psi)
Control Type
DFR (Pressure/Flow)
Differential Pressure Setting
14 bar (200 psi)
Direction Of Rotation
Clockwise (R)
Flow Deviation Max
1.0 L/min (0.26 gpm)
Geometric Displacement
28 cm3/rev (1.71 in3/rev)
Inlet Port Size
SAE J518 1 1/4 in
Inlet Pressure Max (abs)
30 bar (435 psi)
Max Flow (3000 Rpm)
84 L/min (22.2 gpm)
Max Speed (reduced Vg)
3600 rpm
Max Speed (vg Max)
3000 rpm
Nominal Pressure
280 bar (4000 psi)
Peak Pressure
350 bar (5100 psi)
Pilot Port X Thread
7/16-20 UNF-2B
Pressure Port Size
SAE J518 3/4 in
Weight (without Fluid)
33 lb (15 kg)
1620 Old Apex Road
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