Bosch Rexroth | AA10VO71DFR31L-VSC92N00
AA10VO71DFR/31L-VSC92N00
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The AA10VO71DFR/31L-VSC92N00 pump belongs to the A10VSO Variable Pumps series manufactured by Bosch Rexroth. It supplies variable displacement flow to hydraulic actuators in automated machinery. The unit moves 71 cm³ of fluid per revolution, so output varies with drive speed. At a shaft speed of 2200 rpm the pump delivers 41.2 gpm, supporting medium-capacity circuits. Continuous operation is rated for 4100 psi, while the housing tolerates up to 5100 psi during pressure peaks, giving headroom for transient loads. The differential pressure setting of 200 psi provides the reference for the DFR control system to modulate displacement. Generating this pressure at 280 bar requires 233 lb-ft of input torque from the prime mover. The maximum permitted speed at full displacement is 2200 rpm, ensuring internal reaction forces and fluid velocities remain within design limits.
Connections and mechanical limits complete the technical profile. Fluid enters through a 2 in SAE J518 inlet port and exits the pressure side through a 1 in SAE J518 flange, while case drainage is handled by a 7/8-14 UNF-2B port to prevent housing overpressure. An auxiliary X port tapped 7/16-20 UNF-2B supports pilot or charge functions. The internal case holds 0.420 gal of oil, supplying bearing lubrication when external flow is unavailable. Shaft loading allowances reach 540 lbf axially and 427 lbf radially, so the pump can accept belt or gear drives within these limits. When displacement is reduced, the rotor may accelerate to 2600 rpm without exceeding stress thresholds. Dry mass is 78 lb, simplifying mounting in mobile equipment yet providing the stiffness needed for high pressure service.
Technical Specifications
Case Drain Port
7/8-14 UNF-2B
Case Volume
0.420 gal
Differential Pressure (dfr)
200 psi
Displacement Per Rev
71 cm3/rev
Inlet Port Size
SAE J518 2 in
Max Axial Shaft Force
540 lbf
Max Flow (2200 Rpm)
41.2 gpm
Max Radial Shaft Force
427 lbf
Max Speed (reduced Vg)
2600 rpm
Max Speed (vg Max)
2200 rpm
Maximum Pressure
5100 psi
Nominal Pressure
4100 psi
Port X Thread
7/16-20 UNF-2B
Pressure Port Size
SAE J518 1 in
Torque At 280 Bar
233 lb-ft
Weight Without Through Drive
78 lb
1620 Old Apex Road
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