Bosch Rexroth | AA10VSO71DFR31R-PKC92K03
AA10VSO71DFR/31R-PKC92K03
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The AA10VSO71DFR/31R-PKC92K03 axial piston variable pump belongs to the A10VSO Variable Pumps series and is produced by Bosch Rexroth for closed-loop hydraulic automation. It delivers a displacement of 71 cm³ per revolution, supplying the volume required for mid-range cylinders and motors. A clockwise direction of rotation matches prime movers that turn right-hand shafts. At its rated speed of 2200 rpm the pump outputs 41.2 gpm, maintaining steady actuator velocity in mobile or industrial circuits. The suction port uses a 2 in ISO 6162-1 flange so inlet flow enters with minimal pressure drop. A differential pressure setting of 200 psi on the DFR compensator keeps control oil available for swash-plate positioning. The nominal pressure limit of 4100 psi defines continuous operating boundaries. Return leakage exits through a 7/8-14 UNF-2B drain port, and a 7/16-20 UNF-2B pilot port carries remote pressure signals to auxiliary devices.
The design tolerates momentary peaks up to 5100 psi so brief load surges do not damage the rotating group. Drive sizing is guided by a torque requirement of 233 lb-ft at nominal pressure, ensuring the prime mover can overcome fluid resistance. When displacement is reduced the rotating assembly can accelerate to 2600 rpm without exceeding mechanical limits. A 1.2500 in shaft diameter provides adequate torsional strength for keyed or splined couplings. Axial thrust up to ±540 lbf and radial force of 427 lbf at half shaft length allow belt or gear overhung loads in compact power packs. Pressure fluid leaves via a 1 in ISO 6162-1 working port, facilitating connection to common SAE flanged hydraulic lines. These mechanical and hydraulic capabilities enable reliable service in presses, winches, and steering circuits that demand variable flow under high pressure.
Technical Specifications
Dfr Differential Pressure Standard
200 psi (14 bar)
Direction Of Rotation
Clockwise
Displacement (vg)
71 cm³/rev (4.33 in³)
Drain Port L Thread
7/8-14 UNF-2B
Flow At 2200 Rpm (vg Max)
41.2 gpm (156 l/min)
Max Axial Force ±fax
540 lbf (2400 N)
Max Permissible Speed (<vg Max)
2600 rpm
Max Radial Force At A/2
427 lbf (1900 N)
Maximum Pressure
5100 psi (350 bar)
Nominal Pressure
4100 psi (280 bar)
Pilot Port X Thread
7/16-20 UNF-2B
Rated Speed At Vg Max
2200 rpm
Shaft Diameter
1.2500 in (31.75 mm)
Suction Port S Size
2 in (ISO 6162-1)
Torque At 4100 Psi (vg Max)
233 lb-ft (316 Nm)
Working Port B Size
1 in (ISO 6162-1)
1620 Old Apex Road
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