Around 400 CFM is a common step into heavier portable compressed-air work. Australian hire fleets advertise 400 CFM machines for demolition tools, drilling, industrial backup air and other demanding site applications. Exact working pressure varies by model.
Key points
- Common industrial and heavy construction class
- Available in standard and higher pressure variants
- Suitable for multiple heavy tools or backup air
- Frequently towable or trailer-mounted
Why 400 CFM is a versatile heavy-hire class
Australian hire fleets list 400 CFM machines for demolition hammers, rock drills, industrial standby air and heavy construction. Standard-pressure and higher-pressure variants exist, so the words “400 CFM” alone do not fully specify the machine.
Transport becomes more important at this size. Confirm delivery, towing arrangement, placement area and hose connections before the machine arrives, particularly on restricted civil or industrial sites.
How to specify the job
Start with the equipment or process that will consume the air. Record the number of tools that may run at the same time, each tool's required airflow, and the highest operating pressure. For industrial temporary-air jobs, also note required air quality, duty cycle, connection size and whether the process can tolerate interruption.
Airflow, pressure and operating margin
Compressor capacity is usually described by airflow and pressure. In Australia you will commonly see airflow in CFM or m³/min and pressure in PSI or bar. The compressor must meet both requirements at the point of use. Long hose runs, fittings, filters and simultaneous demand can reduce effective performance, so a practical sizing margin is useful.
What to ask the hire supplier
Machine
Confirm rated free-air delivery, working pressure, fuel or electrical requirements and whether the exact model may vary.
Accessories
Ask about hoses, manifolds, aftercoolers, dryers, filtration, receivers, fittings and any tool-specific accessories.
Logistics
Confirm towing or delivery, access, placement, refuelling, collection, operating hours and any site induction requirements.
Safety
Follow the supplier's risk assessment and operating manual. Verify hose, coupling and accessory pressure ratings.
Use the sizing calculator
If your application is based on pneumatic tools, our calculator can total approximate airflow and suggest a compressor class. It is a planning tool only; final selection should be confirmed against the actual equipment specifications.
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