Bosch Rexroth | AA10VO45DFR31L-VSC61N00
AA10VO45DFR/31L-VSC61N00
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The AA10VO45DFR/31L-VSC61N00 pump belongs to the A10VSO Variable Pumps series and is produced by Bosch Rexroth for closed-loop hydraulic automation where variable flow and pressure regulation are required. The unit displaces 45 cm³ per revolution, giving controlled delivery for actuators that demand precise volume per cycle. With a pressure control setting of 4,100 psi, it maintains consistent line pressure during load changes. At 1,800 rpm it supplies 21.4 gpm, matching typical industrial motor speeds. When operated at 1,450 psi the drive shaft transmits 53 lb-ft of torque, while the maximum speed at full displacement is limited to 2,600 rpm for mechanical safety. Power draw reaches 50 hp at 4,100 psi and 1,800 rpm, indicating motor sizing requirements. All working ports are on the rear face to simplify manifold mounting, and no through-drive is provided, so the pump cannot be stacked with additional units.
In applications that rely on remote compensator control, the differential pressure for the DFR arrangement is fixed at 200 psi to stabilize flow across orifices. When shaft speed is increased to the allowable 3,100 rpm at partial displacement, the pump can move up to 30.9 gpm, offering reserve capacity for transient demands. Rotor and swashplate inertia is 0.078 lb-ft², enabling quick swash angle changes without excessive drive shock. Under the full 4,100 psi load the shaft must transmit 148 lb-ft of torque, and at this pressure with maximum speed the required input power rises to 74 hp. These figures guide the selection of couplings, motors, and mounting hardware so the assembly operates reliably in automated hydraulic circuits.
Technical Specifications
Dfr Differential Pressure
200 psi
Displacement
45 cm3/rev
Flow At 1800 Rpm
21.4 gpm
Max Flow At Max Speed
30.9 gpm
Moment Of Inertia
0.078 lb-ft^2
Port Orientation
Rear
Power At 4100 Psi (1800 Rpm)
50 hp
Power At 4100 Psi (max Speed)
74 hp
Pressure Control Setting
4100 psi
Speed Max At Vg < Vg Max
3100 rpm
Speed Max At Vg Max
2600 rpm
Through-drive
None
Torque At 1450 Psi
53 lb-ft
Torque At 4100 Psi
148 lb-ft
1620 Old Apex Road
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