Bosch Rexroth | A10VO28DR31R-VKC62N00
A10VO28DR/31R-VKC62N00
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The A10VO28DR/31R-VKC62N00 belongs to the A10VSO Variable Pumps series and is produced by Bosch Rexroth to supply regulated flow in hydraulic automation. Its displacement of 28 cm³ per revolution sets the base volume moved with each shaft turn. At 1 800 rpm and full displacement, the unit provides 50 L/min to maintain medium flow rates. A maximum permissible speed of 3 600 rpm lets the pump pair with fast prime movers when rapid response is required. The inlet uses a SAE J518 1 1/4 in port so low-pressure oil enters through a common flange pattern, while delivery leaves through a SAE J518 3/4 in pressure port for straightforward connection to actuators. Cavitation is avoided because the suction side must see at least 0.8 bar absolute. Working circuits can reach 350 bar, allowing high-force cylinders or motors to run without exceeding the housing strength.
When driven at the nominal speed specified for this model, flow rises to 84 L/min at maximum displacement, meeting demands for quick machine cycles. The rotating group can operate up to 3 000 rpm with the swashplate fully stroked, balancing flow capacity with mechanical life. Continuous duty is capped at a nominal pressure of 280 bar to limit component stress, and the shaft can transmit 125 Nm at 280 bar so viscous fluids are handled without stalling. Case drain pressure must remain below 2 bar to protect internal seals and bearings. Hydraulic oil temperatures may reach 110 °C, supporting systems that run hot reservoirs. Short-term cold starts are tolerated with viscosities up to 1 600 cSt, while steady operation requires at least 10 cSt to maintain hydrodynamic lubrication within the rotating assembly.
Technical Specifications
Displacement
28 cm3/rev
Flow At 1800 Rpm (vg Max)
50 L/min
Flow At Nnom (vg Max)
84 L/min
Inlet Port
SAE J518 1 1/4 in
Max Case Drain Pressure
2 bar
Max Fluid Temperature
110 °C
Max Permissible Speed
3600 rpm
Max Speed (vg Max)
3000 rpm
Max Torque (280 Bar)
125 Nm
Maximum Pressure
350 bar
Maximum Viscosity (short Term)
1600 cSt
Min Inlet Pressure (abs)
0.8 bar
Minimum Viscosity (continuous)
10 cSt
Nominal Pressure
280 bar
Pressure Port
SAE J518 3/4 in
1620 Old Apex Road
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