Bosch Rexroth | AA4VG56HD3D132L-NSC52F005D
AA4VG56HD3D1/32L-NSC52F005D
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The AA4VG56HD3D1/32L-NSC52F005D is manufactured by Bosch Rexroth within the AA4VG Variable Pumps series and serves closed-circuit hydrostatic drives in mobile and industrial hydraulic automation. A geometric displacement of 56 cm³/rev sets the baseline flow rate, and the unit turns counter-clockwise to match the prime mover and porting layout. At the nominal speed of 3600 rpm it delivers 202 l/min, providing the volume required for medium-power circuits. An integral boost pump with 11.6 cm³/rev maintains charge pressure to prevent cavitation during load changes. Continuous operation is rated for 400 bar, while short excursions up to 450 bar accommodate transient overloads without damage. The pump remains stable down to 500 rpm, enabling low-speed creep functions in precision positioning. A torque demand of 89 Nm at 100 bar indicates the drive power needed for low-pressure startup.
The unit tolerates intermittent speeds up to 4500 rpm, allowing brief high-flow transients during rapid duty cycles. A limited speed rating of 3900 rpm defines the upper boundary for continuous operation beyond the nominal point. Maximum angular acceleration of 24000 rad/s² lets the drive shaft follow quick command changes without slippage. The internal case volume of 1.5 l holds return oil for bearing lubrication and helps dissipate heat. When operating at 400 bar and full displacement it consumes 134 kW, a figure used for engine or motor selection. Drive shaft rotary stiffness of 80.8 kNm/rad resists torsional deflection, maintaining volumetric efficiency under load. A torque requirement of 357 Nm at 400 bar quantifies the mechanical load the prime mover must supply during peak pressure.
Technical Specifications
Boost Pump Displacement
11.6 cm³/rev
Case Volume
1.5 l
Direction Of Rotation
Counter-Clockwise
Displacement
56 cm³/rev
Flow At Nominal Speed (vg Max)
202 l/min
Intermittent Max Speed
4500 rpm
Limited Max Speed
3900 rpm
Max Angular Acceleration
24000 rad/s^2
Maximum Pressure
450 bar
Minimum Speed
500 rpm
Nominal Pressure
400 bar
Nominal Speed
3600 rpm
Power At 400 Bar (nnom, Vg Max)
134 kW
Rotary Stiffness Of Drive Shaft
80.8 kNm/rad
Torque At 100 Bar (vg Max)
89 Nm
Torque At 400 Bar (vg Max)
357 Nm
1620 Old Apex Road
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