Bosch Rexroth | AA10VG18EP3110R-NSC66F025SP-S
AA10VG18EP31/10R-NSC66F025SP-S
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The AA10VG18EP31/10R-NSC66F025SP-S variable piston pump is produced by Bosch Rexroth for the A10VG Variable Piston Pumps series. It supplies adjustable flow to closed-loop hydrostatic drives in mobile or industrial automation. The unit reaches a maximum displacement of 18 cm³ per revolution, so volume output can be trimmed to match actuator demand. When spinning at the rated continuous speed of 4000 rpm, it delivers up to 72 l/min, while the allowable intermittent speed of 5200 rpm supports short bursts of higher power. Nominal operating pressure is 300 bar and peak pressure rises to 350 bar, providing the system with high energy density. The pump develops 86 Nm of torque at 300 bar, information required for sizing prime movers. A minimum operating speed of 500 rpm protects the rotating group from inadequate lubrication. Mechanical connection is made through a 7/8-inch 13-tooth 16/32DP splined shaft that fits common SAE drive arrangements.
The model incorporates M27x2 DIN 3852 service ports for the A and B lines, allowing direct mounting of standard hydraulic fittings. An integral boost stage displaces 5.5 cm³ per revolution and can raise charge pressure to a peak of 25 bar to maintain positive inlet conditions across the main pistons. Electronic pressure control works on a 12 V DC supply; modulation begins at 400 mA and reaches full stroke at 1050 mA, giving predictable flow change as coil current varies. A 100 Hz dither signal can be superimposed to reduce hysteresis in the control spool. These electrical figures help designers match the pump to common mobile controllers and PWM drivers, ensuring stable response under varying load. By integrating the boost circuit and proportional control parameters within the housing, the pump simplifies circuit architecture and supports efficient closed-loop hydraulic systems.
Technical Specifications
A/b Service Ports
M27x2 (DIN 3852)
Boost Pressure, Peak
25 bar
Boost Pump Displacement
5.5 cm³
Control Current End (ep3)
1050 mA
Control Current Start (ep3)
400 mA
Control Voltage (ep3)
12 V DC
Displacement (vg Max)
18 cm³
Dither Frequency (ep)
100 Hz
Max Flow (at Nmax, Vg Max)
72 l/min
Max Speed (continuous)
4000 rpm
Max Speed (intermittent)
5200 rpm
Min Speed
500 rpm
Nominal Pressure
300 bar
Peak Pressure
350 bar
Shaft End (s)
7/8 in 13T 16/32DP
Torque At 300 Bar
86 Nm
1620 Old Apex Road
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