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The AA10VO45DR/31R-PSC62K03 axial piston unit belongs to the A10VSO Variable Pumps series and is manufactured by Bosch Rexroth for hydraulic automation circuits. Its displacement of 45 cm³ per revolution sets the volume delivered each shaft turn. At a nominal speed of 2600 rpm the unit provides 117 L/min, supplying systems that demand a steady flow. Continuous operation is supported at 280 bar, and an internal pressure control is also set to open at 280 bar to prevent overload. When running at these nominal conditions the shaft must transmit 55 kW, information used for selecting a prime mover. Oil exits through a 1 in pressure port that follows ISO 6162-1, while a 1 ½ in suction port of the same flange pattern handles the return flow.
At 1800 rpm the pump outputs 81 L/min, allowing predictable performance at lower drive speeds, and draws 38 kW from the motor at the same pressure. Output torque peaks at 200 Nm when system pressure reaches 280 bar, whereas only 72 Nm is needed at 100 bar for light-duty testing. Short-term pressure spikes up to 350 bar can be held without damage, and the shaft may accelerate to 3100 rpm when the displacement is reduced. Drain oil is routed through a 7/8-14 UNF-2B port, while a 7/16-20 UNF-2B pilot port accepts remote control lines, giving standardized connections for auxiliary functions.
Case Drain Port Thread
7/8-14 UNF-2B
Displacement
45 cm3/rev
Flow At 1800 Rpm (vg Max)
81 L/min
Flow At Nominal Speed (vg Max)
117 L/min
Max Permitted Speed (reduced Vg)
3100 rpm
Max Torque (280 Bar)
200 Nm
Maximum Pressure
350 bar
Nominal Pressure
280 bar
Nominal Speed (vg Max)
2600 rpm
Pilot Port Thread
7/16-20 UNF-2B
Power At 1800 Rpm (280 Bar)
38 kW
Power At Nominal Speed (280 Bar)
55 kW
Pressure Control Setting (dr)
280 bar
Pressure Port Size
1 in (ISO 6162-1)
Suction Port Size
1 1/2 in (ISO 6162-1)
Torque At 100 Bar (vg Max)
72 Nm
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