Bosch Rexroth | AA10VO28DR52L-VRC64N00
AA10VO28DR/52L-VRC64N00
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The AA10VO28DR/52L-VRC64N00 variable pump belongs to the A10VSO Variable Pumps series manufactured by Bosch Rexroth. Designed for hydraulic automation systems, it varies piston stroke to match actuator demand. The unit displaces 28 cm³ per revolution, and the shaft is set for counterclockwise rotation, defining drive coupling orientation. At a drive speed of 3000 rpm with full displacement it supplies up to 84 L/min, while the permissible maximum speed reaches 3600 rpm for short duty peaks. The DR pressure controller needs only 3 L/min of pilot oil and maintains hysteresis at or below 3 bar, allowing stable pressure regulation. Internal case volume is 0.7 L, giving a reference for oil level and thermal calculations.
The pump handles a nominal pressure of 280 bar and tolerates peak events up to 350 bar without structural overload. Absolute inlet pressure may reach 30 bar when a charge pump is used, and it must stay above 0.8 bar to prevent cavitation. Case drain pressure is limited to 2 bar so shaft seals operate within their design range. The drive shaft withstands radial forces up to 1200 N and axial forces up to 1000 N, simplifying pulley or gear selection. Dry weight is 15 kg, enabling single-person handling during installation. These hydraulic and mechanical limits define safe operating windows for continuous industrial service.
Technical Specifications
Case Volume
0.7 L (0.18 gal)
Direction Of Rotation
Counterclockwise
Displacement
28 cm³/rev (1.71 in³/rev)
Dr Controller Hysteresis
≤ 3 bar (45 psi)
Max Axial Force
1000 N (225 lbf)
Max Case Drain Pressure (abs)
2 bar (29 psi)
Max Flow (nmax, Vg Max)
84 L/min (22.2 gpm)
Max Inlet Pressure (abs)
30 bar (435 psi)
Max Radial Force
1200 N (270 lbf)
Min Inlet Pressure (abs)
0.8 bar (12 psi)
Nominal Pressure
280 bar (4000 psi)
Peak Pressure
350 bar (5100 psi)
Permissible Max Speed
3600 rpm
Pilot Oil Consumption (dr)
3 L/min (0.8 gpm)
Speed At Vg Max
3000 rpm
Weight (without Fluid)
15 kg (33 lb)
1620 Old Apex Road
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