An air compressor's tank size, pressure and air delivery describe different capabilities. Match the air tool's required flow at its operating pressure before choosing a large tank.
Compare delivered air
Look for the compressor's documented delivered-air figure and the conditions used. Compare it with the tool's demand and duty pattern. An intake or displacement figure is not necessarily the air available to the tool.
| Specification | What it helps establish |
|---|---|
| Air delivery | Supply at the relevant pressure |
| Tank volume | Stored air, not unlimited continuous output |
| Duty cycle | Permitted operating and recovery pattern |
| Connections | Hose, regulator and fitting compatibility |
Include the complete air system
Hoses, filters and fittings must suit the pressure, flow and application. Check whether the tool needs a particular air quality or lubrication arrangement, and follow both manufacturers' instructions. Do not use a general workshop compressor for breathing air unless specifically designed and approved for that purpose. Plan ventilation, drainage maintenance and power requirements. Choose a compressor for a documented tool workload rather than the highest pressure label. A suitable delivered-air capacity and manageable maintenance routine matter more than tank size alone.
Compare the options
Air compressors & welding, Power tools.