Bosch Rexroth | AA10VSO18DR131R-PPA12N00-SO275
AA10VSO18DR1/31R-PPA12N00 SO275
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The AA10VSO18DR1/31R-PPA12N00 SO275 pump belongs to the A10VSO Variable Pumps series from Bosch Rexroth and serves as a variable-displacement axial piston unit for closed-loop hydraulic automation. Its displacement of 18 cm³ per revolution establishes the volume transferred with every shaft turn, enabling predictable flow calculations. The nominal speed of 3300 rpm is the shaft reference for rating, and at this speed the pump delivers 59 l/min, giving designers a clear figure for circuit sizing. A maximum pressure capability of 350 bar allows operation in high-duty systems, while a continuous nominal pressure of 280 bar defines the recommended working limit for long service life. Supplied torque reaches 80 Nm at 280 bar with the displacement set to maximum, indicating the drive motor requirements. Clockwise rotation aligns with standard right-hand installations, simplifying coupling orientation. A moment of inertia of 0.00093 kg·m² minimizes startup load on the prime mover and supports rapid speed changes demanded by dynamic servo controls.
The pump absorbs 28 kW at nominal speed under a 280 bar differential, showing the electric motor size needed for full output; the figure falls to 15 kW when the shaft speed is 1800 rpm, illustrating the scaling of power with speed. At 1800 rpm the flow rate is 32 l/min, a value often selected for low-speed cycles or standby modes. Permitted speed peaks of 3900 rpm give safety margin for transient overshoot in variable-frequency drives. A pressure increase setting of 4 bar supports control accuracy during load changes, and a hysteresis band of 3 bar prevents unstable oscillation in the pressure compensator. The internal case volume of 0.4 L holds leakage oil for bearing lubrication and thermal buffering. Finally, a weight of 12.9 kg without a through drive eases manual handling during maintenance and reduces frame loading in mobile equipment.
Technical Specifications
Case Volume
0.4 L (0.106 gal)
Direction Of Rotation
Clockwise
Displacement
18 cm³/rev (1.10 in³/rev)
Flow At 1800 Rpm (vg Max)
32 l/min (8.5 gpm)
Flow At Nominal Speed (vg Max)
59 l/min (15.6 gpm)
Hysteresis Δp (dr)
3 bar (45 psi)
Max Speed (vg<vg Max)
3900 rpm
Maximum Pressure
350 bar (5100 psi)
Moment Of Inertia (rotary Group)
0.00093 kg·m² (0.022 lb·ft²)
Nominal Pressure
280 bar (4100 psi)
Nominal Speed (vg Max)
3300 rpm
Power At 1800 Rpm (Δp=280 Bar)
15 kW (19 hp)
Power At Nominal Speed (Δp=280 Bar)
28 kW (38 hp)
Pressure Increase Δp (dr)
4 bar (60 psi)
Torque At Δp=280 Bar (vg Max)
80 Nm (59 lb-ft)
Weight (without Through Drive)
12.9 kg (28 lb)
1620 Old Apex Road
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