Bosch Rexroth | AA10VSO71DRG31R-VKC92K03
AA10VSO71DRG/31R-VKC92K03
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The AA10VSO71DRG/31R-VKC92K03 is manufactured by Bosch Rexroth for the A10VSO Variable Pumps series and is used to deliver adjustable hydraulic flow in automated machinery. The pump moves 4.33 in³ (71 cm³) per revolution, establishing the basic displacement for each shaft turn. It operates at a nominal pressure of 4100 psi (280 bar) to match high-pressure circuits. When driven at 1800 rpm it provides 33.8 gpm (128 l/min), giving designers a standard duty flow point. At the same speed it draws 79 HP (60 kW), which aids in sizing prime movers. The suction connection is a 2 in SAE flange that links to the low-pressure supply line. High-pressure fluid exits through a 1 in SAE flange working port. An internal case volume of 0.420 gal (1.6 l) holds leakage oil for bearing lubrication. Control lines attach to a 7/16-20 UNF-2B pilot port thread to adjust displacement.
Continuous running is permitted up to 2600 rpm so overspeed capacity is available during transients. With the displacement set to maximum, speed must stay within 2200 rpm to limit flow and heating. At rated speed the shaft can transmit 98 HP (73 kW), indicating the maximum power load. Under that condition flow peaks at 41.2 gpm (156 l/min), which represents the highest cataloged output. The housing tolerates brief peaks of 5100 psi (350 bar), giving margin above nominal pressure. Shaft torque reaches 233 lb-ft (316 Nm) at 4100 psi, a value used for coupling selection. At 1450 psi the torque requirement falls to 83 lb-ft (113 Nm), useful for low-pressure duty calculations. A 7/8-14 UNF-2B drain port thread routes case leakage back to tank.
Technical Specifications
Case Volume
0.420 gal (1.6 l)
Displacement Per Revolution
4.33 in3 (71 cm3)
Drain Port Thread
7/8-14 UNF-2B
Flow At 1800 Rpm
33.8 gpm (128 l/min)
Max Flow At Nnom
41.2 gpm (156 l/min)
Max Permissible Speed
2600 rpm
Max Power At Nnom
98 HP (73 kW)
Max Speed At Vg Max
2200 rpm
Max Torque At 4100 Psi
233 lb-ft (316 Nm)
Nominal Pressure
4100 psi (280 bar)
Peak Pressure
5100 psi (350 bar)
Pilot Port Thread
7/16-20 UNF-2B
Power At 1800 Rpm
79 HP (60 kW)
Suction Port Size
2 in SAE Flange
Torque At 1450 Psi
83 lb-ft (113 Nm)
Working Port Size
1 in SAE Flange
1620 Old Apex Road
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