Bosch Rexroth | A10VO28EP1ER53R-VRC62K68P
A10VO28EP1ER/53R-VRC62K68P
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The A10VO28EP1ER/53R-VRC62K68P variable pump belongs to the A10VSO Variable Pumps series from Bosch Rexroth and supplies pressurized fluid for hydraulic automation tasks. Its displacement is 28 cm³ per revolution (1.71 in³/rev), so each shaft turn delivers a fixed volume that simplifies circuit calculations. At 1800 rpm the pump produces 13.2 gpm (50 L/min), meeting the demand of medium-size actuators. The inlet port uses an SAE J518 1 1/4 in flange, while the pressure port follows SAE J518 3/4 in, allowing straightforward connection to suction and pressure lines. Cavitation is avoided when the inlet pressure remains above 12 psi (0.8 bar). A case volume of 0.18 gal (0.7 L) provides room for internal leakage without enlarging the housing, and the dry weight of 33 lb (15 kg) lets a single technician install the unit.
With the swashplate at maximum angle, the pump speed must stay at or below 3000 rpm; at reduced displacement it can run up to 3600 rpm, offering faster cycle times when flow demand is lower. The maximum flow achievable at the highest permissible speed is 22.2 gpm (84 L/min), a value needed for cooler and return-line sizing. Continuous service is supported at 4000 psi (280 bar) nominal pressure, and brief overloads are allowed up to 5100 psi (350 bar). Driving torque is 33 lb-ft (45 Nm) at 100 bar and rises to 91 lb-ft (125 Nm) at 280 bar, information used to rate the prime mover. Case pressure has to remain below 29 psi (2 bar) to protect the shaft seal, and the drain line connects through an ISO 11926 3/4-16 UNF-2B port that maintains proper backpressure control.
Technical Specifications
Case Drain Port
ISO 11926 3/4-16 UNF-2B
Case Volume
0.18 gal (0.7 L)
Displacement
28 cm3/rev (1.71 in3/rev)
Flow At 1800 Rpm
13.2 gpm (50 L/min)
Inlet Port
SAE J518 1 1/4 in
Max Case Pressure (abs)
29 psi (2 bar)
Max Flow At Nmax
22.2 gpm (84 L/min)
Max Perm Speed (vg < Vg Max)
3600 rpm
Max Speed At Vg Max
3000 rpm
Min Inlet Pressure (abs)
12 psi (0.8 bar)
Nominal Pressure
4000 psi (280 bar)
Peak Pressure
5100 psi (350 bar)
Pressure Port
SAE J518 3/4 in
Torque At 100 Bar
33 lb-ft (45 Nm)
Torque At 280 Bar
91 lb-ft (125 Nm)
Weight (without Fluid)
33 lb (15 kg)
1620 Old Apex Road
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