Bosch Rexroth | A10VO28EP1ER53R-VRC62N00P-SO58
A10VO28EP1ER/53R-VRC62N00P SO58
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The A10VO28EP1ER/53R-VRC62N00P SO58 belongs to the A10VSO Variable Pumps series from Bosch Rexroth and is intended to supply adjustable hydraulic flow in automated machinery. It displaces 28 cm³ (1.71 in³) per revolution, so each shaft turn moves a fixed fluid volume into the circuit. At 1800 rpm the pump outputs 13.2 gpm (50 L/min), and when drive speed rises to 3000 rpm flow increases to 22.2 gpm (84 L/min) for faster actuator response. An SAE J518 1 1/4 in inlet port accepts the suction line, while an SAE J518 3/4 in outlet handles the pressure side. Case drainage is connected through a 3/4-16 UNF-2B port compliant with ISO 11926, and the internal case volume of 0.18 gal (0.7 L) maintains cooling oil around rotating parts. The complete assembly weighs 33 lb (15 kg) without fluid, which simplifies installation in mobile or stationary power units.
The shaft may run continuously up to 3600 rpm, though at maximum displacement the recommended ceiling is 3000 rpm to avoid cavitation. A peak angular acceleration of 5500 rad/s supports rapid speed changes in servo-controlled drives, and a moment of inertia of 0.040 lb-ft² (0.0017 kg·m²) reduces energy needed for start-stop cycles. System pressure can be set as high as 280 bar (4000 psi); at this limit the shaft must transmit 91 lb-ft (125 Nm) of torque and can deliver 52 hp (39 kW) of hydraulic power. When pressure is 1450 psi the torque requirement falls to 33 lb-ft (45 Nm), allowing smaller prime movers in moderate-pressure circuits. These ratings define motor sizing, coupling strength, and overall drive capacity for reliable hydraulic operation.
Technical Specifications
Case Volume
0.18 gal (0.7 L)
Displacement Per Rev
28 cm³ (1.71 in³)
Drain Port Thread
3/4-16 UNF-2B (ISO 11926)
Flow (1800 Rpm)
13.2 gpm (50 L/min)
Inlet Port Size
SAE J518 1 1/4 in
Max Angular Acceleration
5500 rad/s
Max Flow (3000 Rpm)
22.2 gpm (84 L/min)
Max Permissible Speed
3600 rpm
Max Power (4000 Psi)
52 HP (39 kW)
Max Speed At Vg Max
3000 rpm
Max Working Pressure
280 bar (4000 psi)
Moment Of Inertia
0.040 lb-ft² (0.0017 kg·m²)
Pressure Port Size
SAE J518 3/4 in
Torque At 1450 Psi
33 lb-ft (45 Nm)
Torque At 4000 Psi
91 lb-ft (125 Nm)
Weight (without Fluid)
33 lb (15 kg)
1620 Old Apex Road
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