Bosch Rexroth | AA4VG71NVDMT132R-NSF52F001D-S
AA4VG71NVDMT1/32R-NSF52F001D-S
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The AA4VG71NVDMT1/32R-NSF52F001D-S variable pump belongs to the AA4VG Variable Pumps series and is manufactured by Bosch Rexroth for hydrostatic drive control. Its geometric displacement of 71 cm³ per revolution sets the primary delivery volume, and at the nominal speed of 3300 rpm the unit supplies up to 234 l/min to the circuit. A continuous operating limit of 400 bar governs sustained workload, while the maximum pressure of 450 bar permits short overload periods. Minimum speed is fixed at 500 rpm for stable low-flow regulation, and intermittent operation can reach 4100 rpm for brief high-demand events. The shaft is configured for clockwise rotation, ensuring compatibility with drive trains that follow standard right-hand orientation.
The integrated boost stage displaces 19.6 cm³ per revolution and keeps the charge line at 25 bar, preventing cavitation at the main inlet. When the main circuit runs at 400 bar, the pump transmits 452 Nm of torque and draws 156 kW, figures required for sizing the prime mover. A permissible pressure rise of 9000 bar per second allows rapid control shifts without damaging internal components. The case volume of 1.3 l stores leakage oil and manages thermal expansion. For control plumbing, the stroking port is threaded 7/16-20 UNF-2B, and a through-drive spline of 5/8 in 9T 16/32DP supports tandem mounting with an auxiliary pump.
Technical Specifications
Boost Nominal Pressure
25 bar
Boost Pump Displacement
19.6 cm³/rev
Case Volume
1.3 l
Direction Of Rotation
Clockwise
Flow At Nnom (vg Max)
234 l/min
Geometric Displacement
71 cm³/rev
Max Speed (intermittent)
4100 rpm
Maximum Pressure
450 bar
Minimum Speed
500 rpm
Nominal Pressure
400 bar
Nominal Speed
3300 rpm
Power At 400 Bar
156 kW
Rate Of Pressure Change
9000 bar/s
Stroking Port Thread
7/16-20 UNF-2B
Through-drive Spline
5/8 in 9T 16/32DP
Torque At 400 Bar
452 Nm
1620 Old Apex Road
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