Rexroth A8VO120 Series Variable Double Pump for Rotary Drilling Rigs Construction Machinery

Product Overview:
The A8VO120 is a high-performance bent-axis design axial piston variable double pump from the renowned Rexroth A8VO series. Specifically engineered for open circuit hydraulic systems, this twin-pump unit delivers exceptional power density, reliable operation, and precise control under extreme loads . With a displacement of 120 cm³/rev per pump and multiple advanced control options, it provides independent or combined flow for demanding mobile and industrial applications . This unit is a direct, high-quality replacement solution for original Rexroth equipment.

Technical Specifications:

• Model: A8VO120

• Type: Bent-axis design, variable axial piston double pump

• Displacement: 120 cm³/rev (per pump, steplessly variable from Vg max to Vg min = 0) 

• Nominal Pressure: 350 bar (35 MPa) 

• Maximum Pressure: 400 bar (40 MPa) 

• Peak Pressure Capability: Up to 420 bar depending on configuration 

• Control Options: LA1KH2 (hydraulic/electric proportional), individual power controllers, load sensing, pressure cutoff, and more 

• Design: For open circuit hydraulic systems with common suction port for auxiliary pump and both circuits 

• Mounting: SAE standard, suitable for direct mounting on diesel engine flywheel housing 

• Temperature Range: -20°C to +80°C 

• Weight: Approximately 116 kg 

Core Features:

• Bent-Axis Double Pump Design: Features two axial tapered piston rotary groups in a compact twin-pump configuration, delivering independent hydraulic power for multiple functions simultaneously .

• High Pressure Capability: Rated for continuous operation at 350 bar with peak pressures up to 400-420 bar, providing immense power for heavy-duty applications .

• Stepless Variable Displacement: Flow is proportional to input speed and displacement, adjustable steplessly from maximum down to zero for precise flow matching and energy savings .

• Excellent Power-to-Weight Ratio: Compact, lightweight construction delivers maximum power output in minimal installation space .

• Integrated Auxiliary Pump: Built-in charge pump with pressure-relief valve, optionally available with additional pressure-reduction valve .

• Multiple Control Options: Wide range of control instruments available for different control and regulating functions, including individual power controllers .

• Power Take-Off Capability: Multiple PTO options for mounting additional axial piston and gear pumps .

• Durability: Robust construction with high-strength alloy materials and surface-hardened critical components ensures long service life even in extreme conditions .

• High Efficiency: Volumetric efficiency up to 94% and mechanical efficiency over 90% minimize energy loss and reduce operating costs .

• Wide Temperature Operation: Reliable performance across a broad temperature range from -20°C to +80°C .

Main Applications (Suitable Equipment):
The A8VO120 is widely recognized as the specialized power unit for heavy machinery requiring dual hydraulic circuits. It is extensively used in:

1. Rotary Drilling Rigs & Foundation Equipment:

• Main hydraulic pump for rotary drilling rigs 

• Power head and rotary drives for piling rigs 

• Geological exploration and core drilling rigs 

• Water well drilling and mine exploration equipment 

• Tunneling boring machines (TBM) and horizontal directional drills 

2. Construction & Excavation Machinery:

• Main pump for medium to large excavators (20-40 ton class) 

• Hydraulic systems for crawler cranes and piling equipment 

• Road headers and tunnel boring machines 

3. Mining & Heavy Industry:

• Mining machinery and rock drilling rigs 

• Underground mining equipment and mineral transport systems 

• Heavy-duty industrial hydraulic power units 

4. Material Handling & Mobile Equipment:

• Heavy forklifts and telehandlers 

• Mobile cranes and crawler cranes 

• Aerial work platforms and specialized vehicles 

5. Marine & Offshore:

• Ship hydraulic systems and deck machinery 

• Offshore drilling platform hydraulics 

6. Agricultural Machinery:

• Large combine harvesters and self-propelled sprayers 

7. Energy Sector:

• Wind turbine hydraulic systems 

• Oil field equipment and hydraulic power units