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A4VG180
Rexroth
Product Overview
The A4VG180 is a high-performance, large-displacement axial piston unit engineered for the most demanding closed-circuit hydrostatic drive systems. Utilizing a robust bent-axis design, this variable displacement unit serves as the hydraulic heart of ultra-large mobile and industrial machinery. It intelligently converts hydraulic power into smooth, high-torque rotary motion (as a motor) or generates high-pressure flow (as a pump), delivering unparalleled power density, control precision, and reliability for critical heavy-duty applications.
Key Technical Specifications
| Parameter | Specification / Description |
|---|---|
| Series / Model | A4VG180 |
| Type | Variable Displacement, Bent-Axis Axial Piston Unit (Pump/Motor) |
| Primary Circuit | Closed Circuit (Hydrostatic Drive) |
| Nominal Displacement | Approx. 180 cm³/rev (Confirm via exact model code) |
| Pressure Rating | Very High Pressure; typical maximum operating pressure up to 400 bar or higher. |
| Control Types | Electro-hydraulic proportional (e.g., HD), hydraulic servo (DA), or constant power (EP) control options. |
| Key Design Feature | Integrated charge pump for control oil supply and loop supercharging. |
| Shaft Configuration | Through-drive splined shaft for tandem pump mounting. |
Key Features & Advantages
Exceptional Power & Torque Output: The large 180 cm³ displacement provides immense hydraulic power and torque, capable of driving the travel and work functions of the world's largest equipment.
Bent-Axis Design Efficiency: The bent-axis principle ensures high starting torque, excellent overall efficiency across a wide speed range, and smooth operation at both high and low speeds.
Intelligent Control & Energy Savings: Advanced control systems (e.g., load-sensing, constant horsepower) allow the unit to automatically match its output to demand, optimizing machine performance and significantly reducing fuel consumption.
Integrated System Solution: The built-in charge pump and control valves minimize external plumbing, reduce potential leak points, and simplify the overall hydraulic system architecture.
Extreme Duty Construction: Built with premium materials to withstand continuous operation under extreme pressure, severe shock loads, and the harshest environments in mining, offshore, and heavy construction.
Typical Applications
This unit is the core drive component for ultra-large-scale machinery, including:
Large Mining Excavators & Shovels (e.g., 80-ton class and above)
Heavy-Duty Wheel Loaders & Crawler Cranes
Tunnel Boring Machines (TBMs) & Piling Rigs
Large Marine Deck Machinery (winches, cranes)
High-Power Forestry Harvesters & Forwarders