Bosch Rexroth | AA10VM45HZ52W1-VRC66N007
AA10VM45HZ/52W1-VRC66N007
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The AA10VM45HZ/52W1-VRC66N007 axial piston unit is produced by Bosch Rexroth within the A10VM Variable Motors series. It serves as a variable-displacement motor for closed-circuit hydrostatic transmissions where directional change and speed regulation are required. The maximum displacement of 45 cm³ per revolution allows the designer to match flow to load demand, while a nominal pressure rating of 280 bar supports continuous duty in mobile equipment. A maximum pressure limit of 350 bar provides reserve for short overloads. The motor can turn at up to 4000 rpm, enabling operation with high input speeds. At nominal speed and full displacement the inlet flow reaches 180 L/min, so piping must be sized accordingly. Variable direction of rotation enables forward and reverse torque without external gearing, and a torque output of 200 Nm at 280 bar shows the mechanical work it can deliver. Hydraulic connections use a 1 1/16-12 UN-2B thread on both working ports.
The motor weighs 18 kg, easing handling during installation. A boost pressure setting of 16 bar maintains positive filling in the piston set and prevents cavitation when displacement is reduced. The case housing withstands an absolute pressure of 2 bar, so drain lines must keep backpressure below that value. Circuit designers must also hold the low-pressure side above 2 bar absolute to protect the rotating group, while the high-pressure side must not fall below 10 bar absolute to secure control stability. Control actuation requires a pilot pressure of at least 30 bar, ensuring the HZ swashplate mechanism can vary angle precisely under load. Power is transferred through a 1-inch, 15-tooth, 16/32 DP spline shaft that mates with standard hydraulic drive couplings. FKM sealing material is used on dynamic and static seals to provide compatibility with mineral oils over a wide temperature range.
Technical Specifications
Boost Pressure Setting (n007)
16 bar
Direction Of Rotation
Variable
Displacement (vg Max)
45 cm³/rev
Drive Shaft Spline (r)
1 in 15T 16/32 DP
Inlet Flow At Nnom (vg Max)
180 L/min
Max Case Pressure (l,l1)
2 bar (absolute)
Max Speed (vg Max)
4000 rpm
Maximum Pressure
350 bar
Minimum High-pressure Side
10 bar (absolute)
Minimum Low-pressure Side
2 bar (absolute)
Minimum Pilot Pressure (hz)
30 bar
Nominal Pressure
280 bar
Sealing Material
FKM
Torque At 280 Bar (vg Max)
200 Nm
Weight
18 kg
Working Port Thread (a,b)
1 1/16-12 UN-2B
1620 Old Apex Road
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