Bosch Rexroth | AA4VG56HD3D132R-NSC52F025D-S
AA4VG56HD3D1/32R-NSC52F025D-S
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The AA4VG56HD3D1/32R-NSC52F025D-S is manufactured by Bosch Rexroth for the AA4VG Variable Pumps series and serves as an adjustable-displacement source of flow and pressure in hydraulic automation. Its geometric displacement is 56 cm³ per revolution, which delivers 202 L/min at nominal speed when the swashplate is at maximum angle. The drive can run as low as 500 rpm and reach 3600 rpm at full displacement with zero differential pressure, while intermittent duty permits 4500 rpm for short peaks. Control circuitry must supply at least 20 bar above case pressure to move the swashplate. A moment of inertia of 0.0066 kg·m² limits load on the prime mover during starts, and a maximum angular acceleration rating of 24 000 rad/s² allows quick speed changes required in dynamic closed-circuit systems.
The integrated charge pump displaces 11.6 cm³ per revolution to feed the main pistons and purge heat into a 1.5-liter case volume. Continuous operation is supported at a nominal pressure of 5800 psi, with a permissible peak of 6500 psi, developing 357 N·m of shaft torque at nominal load. Prolonged running should not exceed a limited maximum speed of 3900 rpm, and output power can reach 134 kW under the same nominal conditions. A maximum pressure-rise rate of 9000 bar/s lets the control valve track rapid load changes without inducing cavitation. These parameters define the pump’s capability to deliver stable, high-power hydrostatic drive performance across variable duty cycles.
Technical Specifications
Boost Pump Displacement
11.6 cm^3/rev (0.71 in^3/rev)
Case Volume
1.5 l (0.40 gal)
Flow At Nominal Speed (vg Max)
202 l/min (53.4 gpm)
Geometric Displacement
56 cm^3/rev (3.42 in^3/rev)
Intermittent Max Speed
4500 rpm
Limited Max Speed
3900 rpm
Max Angular Acceleration
24000 rad/s^2
Max Speed (at Vg Max, Dp=0)
3600 rpm
Maximum Pressure
6500 psi (450 bar)
Min Control Pressure (hd)
20 bar above case (290 psi)
Minimum Speed
500 rpm
Moment Of Inertia
0.0066 kg m^2 (0.1566 lb ft^2)
Nominal Pressure
5800 psi (400 bar)
Power At Dp=5800 Psi (nnom)
134 kW (180 hp)
Rate Of Pressure Change Max
9000 bar/s (130000 psi/s)
Torque At Dp=5800 Psi
357 Nm (263 lb-ft)
1620 Old Apex Road
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