Bosch Rexroth | AA10VSO18DFR31R-VSC62N00
AA10VSO18DFR/31R-VSC62N00
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The AA10VSO18DFR/31R-VSC62N00 axial piston unit is part of the A10VSO Variable Pumps series from Bosch Rexroth, designed to provide adjustable flow and pressure in hydraulic automation loops. Its displacement of 18 cm³ per revolution defines the volume transferred each shaft turn, and at 1800 rpm the pump delivers 8.5 gpm to maintain steady actuator movement. A nominal-speed flow of 15.6 gpm gives reserve capacity for peak demand, while the DFR regulator keeps deviation to 0.24 gpm so circuit performance remains consistent. Operation at reduced displacement allows a permissible speed of 3900 rpm, whereas full displacement use is limited to 3300 rpm to protect rotating components. The standard pressure control setting of 4100 psi establishes the relief threshold, and the working port can sustain up to 5100 psi to accommodate transient load spikes without damage.
System connections and auxiliary limits complete the functional profile. The case drain line tolerates 30 psi to ensure housing lubrication without seal stress, and the standard DFR differential of 200 psi determines the margin between load and control pressures for stable swashplate positioning. Control signals enter through a pilot port threaded 7/16-20 UNF-2B for compatibility with common fittings. On the inlet side, suction pressure may reach 145 psi, and a 1-inch ISO 6162-1 port carries this flow into the pump. Delivery exits through a 3/4-inch ISO 6162-1 working port sized for the rated flow range. When the system reaches 280 bar, the shaft can transmit 59 lb-ft of torque, matching typical drive motor ratings. The pump weighs 28 lb without a through-drive, allowing straightforward handling during installation.
Technical Specifications
Case Drain Port Pressure Max
30 psi (2 bar)
Dfr Differential Pressure (std)
200 psi (14 bar)
Displacement
18 cm³/rev (1.10 in³)
Flow @ 1800 Rpm
8.5 gpm (32 L/min)
Max Flow @ Nnom
15.6 gpm (59 L/min)
Max Flow Deviation (dfr)
0.24 gpm (0.9 L/min)
Max Perm Speed (vg < Vg Max)
3900 rpm
Max Speed (vg Max)
3300 rpm
Pilot Port Thread (x)
7/16-20 UNF-2B
Pressure Control Setting (std)
4100 psi (280 bar)
Suction Port Pressure Max
145 psi (10 bar)
Suction Port Size (s)
1 in (ISO 6162-1)
Torque @ 280 Bar
59 lb-ft (80 Nm)
Weight (without Through Drive)
28 lb (12.9 kg)
Working Port Pressure Max
5100 psi (350 bar)
Working Port Size (b)
3/4 in (ISO 6162-1)
1620 Old Apex Road
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