Bosch Rexroth | AA10VO28DFR31R-VSC62N00
AA10VO28DFR/31R-VSC62N00
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The AA10VO28DFR/31R-VSC62N00 pump belongs to the A10VSO Variable Pumps series manufactured by Bosch Rexroth and is used to regulate hydraulic power in automated machinery. A geometric displacement of 28 cm³/rev defines how much fluid is moved per revolution, setting the baseline flow rate. Continuous operation is supported by a nominal pressure of 4000 psi (280 bar), while a peak pressure limit of 5100 psi (350 bar) handles short overloads. The DFR differential pressure is preset to 200 psi (14 bar) so the compensator can hold a stable output when system demand changes. A SAE J518 3/4 in pressure port matches common flange fittings to streamline plumbing. The rotating assembly carries a moment of inertia of 0.040 lb-ft² (0.0017 kg·m²), easing start-up torque on the prime mover, and the unit weighs 33 lb (15 kg) without fluid, which helps during installation and servicing.
The pump supplies 50 L/min at 1800 rpm for steady mid-range duty and reaches 84 L/min at 3000 rpm when higher flow is required. Power demand is 31 HP (23 kW) at 1800 rpm, rising to 52 HP (39 kW) at maximum speed so engine or motor selection can be matched to workload. Rated speed with full displacement is 3000 rpm, yet the mechanism can run up to 3600 rpm when displacement is reduced, giving additional flexibility for variable cycles. Output torque registers 33 lb-ft (45 Nm) at 1450 psi and increases to 91 lb-ft (125 Nm) at 4000 psi to transmit the required hydraulic power across different pressure levels. A filling capacity of 0.18 gal (0.7 L) ensures enough internal oil for lubrication and thermal buffering during start-up and continuous operation.
Technical Specifications
Dfr Differential Pressure
200 psi (14 bar)
Filling Capacity
0.18 gal (0.7 L)
Flow (1800 Rpm)
50 L/min
Geometric Displacement
28 cm3/rev
Max Flow (3000 Rpm)
84 L/min
Max Power (at Max Speed)
52 HP (39 kW)
Max Speed (at Vg < Vg Max)
3600 rpm
Max Speed (at Vg Max)
3000 rpm
Moment Of Inertia
0.040 lb-ft2 (0.0017 kgm2)
Nominal Pressure
4000 psi (280 bar)
Peak Pressure
5100 psi (350 bar)
Power (1800 Rpm)
31 HP (23 kW)
Pressure Port
SAE J518 3/4 in
Torque (1450 Psi)
33 lb-ft (45 Nm)
Torque (4000 Psi)
91 lb-ft (125 Nm)
Weight (without Fluid)
33 lb (15 kg)
1620 Old Apex Road
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