Bosch Rexroth | AA4VG71HD3D132R-NSF52F001D
AA4VG71HD3D1/32R-NSF52F001D
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The AA4VG71HD3D1/32R-NSF52F001D pump is produced by Bosch Rexroth within the AA4VG Variable Pumps series. It supplies closed-circuit hydraulic drives with variable flow for automated machinery. The unit’s geometric displacement is 71 cm³ per revolution, defining the volume transferred during each shaft turn. When operated at its nominal speed of 3300 rpm it delivers 234 l/min, giving designers an accurate basis for sizing actuators. Speed capability starts at 500 rpm for low-velocity duties and extends to a limited maximum of 3600 rpm so overspeed protection can be set correctly. The pump sustains a nominal pressure of 400 bar for continuous duty and can withstand 450 bar during peak loading, matching the demands of high-pressure motion circuits. A minimum control pressure of 20 bar is required to shift the swashplate, ensuring response of the displacement mechanism under all conditions.
An integrated boost stage feeds the main inlet with 19.6 cm³ per revolution, maintaining case fill when the swashplate is at zero stroke. That boost circuit works at 25 bar during normal service and may rise to 40 bar under transient spikes, guarding the pump against cavitation. The suction port tolerates up to 5 bar absolute so reservoir pressurization can be used to improve inlet conditions. Output torque reaches 452 Nm at 400 bar, while mechanical power required at the same pressure equals 156 kW; these figures allow motor and coupling selection. Fluid exits through a 1 in SAE J518 working port, simplifying connection to common manifold blocks. Drive is transmitted through a 1 1/4 in 14-tooth 12/24DP spline, providing positive engagement with standard DIN shafts. Together these parameters verify installation clearances, power match, and safe operating margins for automated hydraulic systems.
Technical Specifications
Boost Pump Displacement
19.6 cm³/rev
Boost Pump Maximum Pressure
40 bar
Boost Pump Nominal Pressure
25 bar
Control Pressure Min (hd)
20 bar
Drive Shaft Spline
1 1/4 in 14T 12/24DP
Flow At Nominal Speed
234 l/min
Geometric Displacement
71 cm³/rev
Maximum Pressure
450 bar
Maximum Speed (limited)
3600 rpm
Minimum Speed
500 rpm
Nominal Pressure
400 bar
Nominal Speed (vg Max)
3300 rpm
Power At 400 Bar
156 kW
Suction Port Max Pressure
5 bar (absolute)
Torque At 400 Bar
452 Nm
Working Port Size (sae J518)
1 in
1620 Old Apex Road
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