Bosch Rexroth | AA10VSO71DRG-31R-VKC92N00
AA10VSO71DRG /31R-VKC92N00
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The AA10VSO71DRG /31R-VKC92N00 variable pump is manufactured by Bosch Rexroth and belongs to the A10VSO Variable Pumps series. It provides adjustable hydraulic flow for automated machinery that relies on closed-loop pressure control. The displacement is 71 cm³ per revolution, giving the unit the volumetric capacity required for medium-duty circuits. When set to its maximum geometric volume, it supplies 128 L/min at 1800 rpm and 156 L/min at nominal speed, allowing actuators to move at controlled rates. A nominal pressure of 280 bar defines the continuous working limit, while a maximum pressure of 350 bar covers intermittent peaks. The standard differential pressure of 20 bar supports load-sensing operation. Mechanical integrity is maintained up to a permissible speed of 2600 rpm, and continuous running at maximum displacement is limited to 2200 rpm.
Control functions are served by a pilot port rated for 350 bar, with a 7/16-20 UNF-2B thread that matches common hydraulic fittings. Stroke regulation responds to a pressure increase of 8 bar, enabling the pump to reduce output when system demand falls. Drive requirements are 113 Nm at 100 bar and rise to 316 Nm at 280 bar, figures that assist in motor sizing. The pressure outlet is a 1 in SAE J518 flange so high-pressure lines connect without adapters, while the 2 in SAE J518 suction inlet minimizes inlet velocity and cavitation risk. Case drainage is handled through a 7/8-14 UNF-2B thread on port L to maintain housing pressure below limits. These port dimensions, together with the specified torque and control characteristics, integrate the pump cleanly into industrial hydraulic systems.
Technical Specifications
Differential Pressure (standard)
20 bar
Displacement
71 cm³/rev
Drain Port L Thread
7/8-14 UNF-2B
Flow At 1800 Rpm (vg Max)
128 L/min
Flow At Nnom (vg Max)
156 L/min
Max Permissible Speed
2600 rpm
Max Speed At Vg Max
2200 rpm
Max Torque At 280 Bar
316 Nm
Maximum Pressure
350 bar
Nominal Pressure
280 bar
Pilot Port Max Pressure
350 bar
Pilot Port X Thread
7/16-20 UNF-2B
Pressure Increase Δp (control)
8 bar
Pressure Port B Size
1 in (SAE J518)
Suction Port S Size
2 in (SAE J518)
Torque At 100 Bar
113 Nm
1620 Old Apex Road
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