Bosch Rexroth | AA10VSO18DFR131R-PPA12N00-SO32
AA10VSO18DFR1/31R-PPA12N00 SO32
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The AA10VSO18DFR1/31R-PPA12N00 SO32 axial piston unit belongs to the A10VSO Variable Pumps series and is built by Bosch Rexroth for closed-loop hydraulic automation where adjustable flow is required. It has a displacement of 18 cm³ per revolution, so each shaft rotation moves 1.10 in³ of fluid through the circuit. When operated at 1800 rpm with the swashplate at maximum angle, the pump supplies 8.5 gpm, providing a stable feed for moderate-duty actuators. The nominal speed capability is 3300 rpm, and within this limit the housing must withstand a system pressure up to 5100 psi. Driving torque reaches 59 lb-ft at 280 bar, indicating the mechanical load that must be furnished by the prime mover. A case volume of 0.106 gal ensures enough internal oil to cool rotating groups, while the working port uses a 3/4-inch SAE J518 flange to connect directly to pressure lines carrying mineral oil HLP as the specified fluid.
At maximum displacement and a shaft speed of 3300 rpm, the pump produces 15.6 gpm, allowing higher actuator velocities when the machine cycle demands faster motion. If reduced displacement is selected, the drive train can accelerate to 3900 rpm, extending the usable speed range without exceeding permissible piston velocity. Suction conditions are defined by a maximum inlet height of 31.5 in, so reservoir positioning must limit static lift to maintain cavitation-free operation. The suction port is a 1-inch SAE J518 flange and may be pressurized up to 145 psi, increasing installation flexibility on boosted supply systems. Circuit pilot signals enter through a port threaded 7/16-20 UNF-2B, and that connection tolerates pressures up to 5100 psi for consistent control of the compensator. Excess leakage exits through a drain port machined with a 9/16-18 UNF-2B thread, facilitating easy hose routing back to tank. Collectively, these interface details simplify plumbing and ensure reliable variable-flow performance.
Technical Specifications
Case Volume
0.106 gal (0.4 L)
Displacement
18 cm³/rev (1.10 in³)
Drain Port Thread
ISO 11926 9/16-18 UNF-2B
Flow At 1800 Rpm (vg Max)
8.5 gpm (32 L/min)
Flow At 3300 Rpm (vg Max)
15.6 gpm (59 L/min)
Hydraulic Fluid
Mineral Oil HLP (DIN 51524-2)
Maximum Pressure
5100 psi (350 bar)
Maximum Speed (reduced Displacement)
3900 rpm
Maximum Suction Height
31.5 in (800 mm)
Nominal Speed
3300 rpm
Pilot Port Max Pressure
5100 psi (350 bar)
Pilot Port Thread
ISO 11926 7/16-20 UNF-2B
Suction Port Max Pressure
145 psi (10 bar)
Suction Port Size
1 in (SAE J518)
Torque At 280 Bar
59 lb-ft (80 Nm)
Working Port Size
3/4 in (SAE J518)
1620 Old Apex Road
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