Bosch Rexroth | AA4VG71HWDL132R-NSF52FO11D-S
AA4VG71HWDL1/32R-NSF52FO11D-S
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The AA4VG71HWDL1/32R-NSF52FO11D-S pump is produced by Bosch Rexroth in the AA4VG Variable Pumps series for closed-loop hydraulic drives used in automated machinery. Its displacement of 71 cm³ per revolution determines the geometric volume moved with each shaft rotation, giving engineers a firm basis for flow calculations. At 3300 rpm and full displacement, the pump supplies 234 l/min, a rate suitable for cylinders and motors that need high volumetric throughput. The unit withstands a maximum pressure of 450 bar, while a nominal rating of 400 bar defines continuous service limits. Power demand reaches 156 kW at 400 bar and maximum stroke, so motor selection must account for this load. Under the same conditions the drive shaft must transmit 452 Nm of torque, guiding coupling choices. Speed capability ranges from 500 rpm up to a limited 3600 rpm, providing a broad control window for variable-speed electric or diesel primes.
A built-in boost stage with 19.6 cm³ per revolution sustains charge pressure so the main piston group always receives adequate inlet flow. The 1.3 l case volume holds leakage oil for internal cooling and lubrication. Clockwise rotation matches standard right-hand drive arrangements, easing mechanical integration. Drain plumbing must tolerate case pressure peaks of 10 bar at port T to avoid backpressure faults. The HW hydraulic controller requires at least 20 bar above case level, establishing the minimum control pressure for stroke actuation. A permitted pressure rise rate of 9000 bar/s limits command steps and protects components from hydraulic shock. The rotating assembly’s moment of inertia of 0.0097 kg·m² influences acceleration demands on the prime mover, and an overall weight of 50 kg without through drive affects mounting hardware and handling procedures.
Technical Specifications
Boost Pump Displacement
19.6 cm³/rev
Case Volume
1.3 l
Direction Of Rotation
Clockwise
Displacement
71 cm³/rev
Flow At 3300 Rpm (vg Max)
234 l/min
Max Case Pressure Peaks (port T)
10 bar
Max Speed (limited)
3600 rpm
Maximum Pressure
450 bar
Min Control Pressure (hw)
20 bar (above case)
Min Speed
500 rpm
Moment Of Inertia Jtw
0.0097 kg·m²
Nominal Pressure
400 bar
Power At 400 Bar (vg Max)
156 kW
Rate Of Pressure Change Max
9000 bar/s
Torque At 400 Bar (vg Max)
452 Nm
Weight (without Through Drive)
50 kg
1620 Old Apex Road
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