Bosch Rexroth | AA10VSO18DR31R-VKC62N00
AA10VSO18DR/31R-VKC62N00
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The AA10VSO18DR/31R-VKC62N00 axial piston unit is produced by Bosch Rexroth within the A10VSO Variable Pumps series. It supplies adjustable hydraulic flow for industrial automation circuits that demand compact size and precise pressure control. The pump displacement is 18 cm³ per revolution, so each turn of the drive shaft transfers this fluid volume to the system. Under continuous duty the nominal pressure rating is 280 bar (4100 psi), giving a reliable working limit, while a maximum pressure allowance of 350 bar (5100 psi) covers short overloads. At a drive speed of 1800 rpm the unit delivers 32 l/min (8.5 gpm), and it can reach 59 l/min (15.6 gpm) when driven at its nominal speed, enabling a wide operating window. The corresponding shaft input at nominal conditions is 28 kW (38 HP), which defines motor sizing for the prime mover. With 30 Nm (22 lb-ft) of torque required at 100 bar, low-pressure start-up remains moderate. A case volume of 0.4 L (0.106 gal) retains internal leakage oil for cooling and bearing lubrication.
Peak duty parameters and port data complete the hydraulic profile. The pump develops up to 80 Nm (59 lb-ft) at 280 bar, allowing high load response without stalling. Rated volumetric geometry lets it reach 3300 rpm at maximum displacement, and a permissible overspeed limit of 3900 rpm covers transient events during rapid deceleration. The drain port may face back-pressure up to 2 bar (30 psi) so return line sizing must keep restriction below this value. Control signals enter through a pilot port that tolerates 350 bar (5100 psi) and uses a 7/16-20 UNF-2B thread to match standard fittings. Suction conditions are kept stable by limiting inlet pressure to 10 bar (145 psi) and providing a 1 in ISO 6162-1 suction flange that reduces velocity losses. These characteristics ensure steady flow, accurate displacement control, and dependable service life when integrated into closed-loop hydraulic motion systems.
Technical Specifications
Case Volume
0.4 L (0.106 gal)
Displacement
18 cm³/rev
Drain Port Max Pressure
2 bar (30 psi)
Flow @ 1800 Rpm
32 l/min (8.5 gpm)
Max Flow @ Nnom
59 l/min (15.6 gpm)
Max Power @ Nnom
28 kW (38 HP)
Max Speed (vg Max)
3300 rpm
Max Torque @ 280 Bar
80 Nm (59 lb-ft)
Maximum Pressure
350 bar (5100 psi)
Nominal Pressure
280 bar (4100 psi)
Permissible Max Speed
3900 rpm
Pilot Port Max Pressure
350 bar (5100 psi)
Pilot Port Thread
7/16-20 UNF-2B
Suction Port Max Pressure
10 bar (145 psi)
Suction Port Size
1 in (ISO 6162-1)
Torque @ 100 Bar
30 Nm (22 lb-ft)
1620 Old Apex Road
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