Bosch Rexroth | A10VSO18DRG31R-PKC62K01
A10VSO18DRG/31R-PKC62K01
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The A10VSO18DRG/31R-PKC62K01 variable pump is produced by Bosch Rexroth for the A10VSO Variable Pumps series and supplies adjustable flow for hydraulic automation loops. Its displacement is 18 cm³ per revolution, allowing precise flow calculation from shaft speed. At 1800 rpm the unit can output 32 L/min, providing adequate volume for medium duty actuators. A nominal pressure rating of 280 bar sets the continuous system limit, while a 350 bar peak rating lets the circuit absorb short overloads. The pressure cut-off is fixed at 280 bar so the controller reduces displacement once this level is reached to protect components. Controller hysteresis of 60 psi minimizes pressure fluctuation around the cut-off point. A 20 bar differential in the DRG control circuit serves as the reference for displacement change. Flow travels from port S to port B, guiding manifold layout and hose routing.
To avoid cavitation, the inlet must stay above an absolute pressure of 0.8 bar, and case drain pressure is limited to 2 bar to protect shaft seals. The internal case volume of 0.4 L holds leakage oil and dampens pressure pulses. A rotor group moment of inertia of 0.00093 kg·m² permits quick speed changes with modest drive power. Drive torque demand is 30 Nm at 100 bar, giving a baseline for motor sizing, and rises to 80 Nm at the nominal 280 bar for full load calculations. The pump weighs 12.9 kg without a through drive, allowing manual handling during installation. The shaft is intended to rotate clockwise when viewed from the drive end, matching common prime mover orientations.
Technical Specifications
Case Volume
0.4 L (0.106 gal)
Controller Hysteresis (drg)
60 psi (4 bar)
Direction Of Flow
S To B
Direction Of Rotation
Clockwise (Viewed On Shaft)
Displacement
18 cm³/rev (1.10 in³/rev)
Drg Differential Pressure (standard)
20 bar (290 psi)
Max Case Drain Pressure (abs)
2 bar (29 psi)
Max Flow At 1800 Rpm
32 L/min (8.5 gpm)
Min Inlet Absolute Pressure
0.8 bar (12 psi)
Moment Of Inertia (rotor Group)
0.00093 kg·m² (0.022 lb·ft²)
Nominal Pressure
280 bar (4100 psi)
Peak Pressure
350 bar (5100 psi)
Pressure Cut-off (standard)
280 bar (4100 psi)
Torque At 100 Bar
30 Nm (22 lb-ft)
Torque At 280 Bar
80 Nm (59 lb-ft)
Weight (without Through Drive)
12.9 kg (28 lb)
1620 Old Apex Road
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