Heavy sandblasting and abrasive blasting
Large-scale surface preparation, multi-pot blast operations, and structural steel cleaning.

Onsite Rentals offer a range of medium sized industrial air compressors, designed to meet the varied demands of work sites across Australia.
These high-output units are built for mid-sized to large-scale industrial, mining, and infrastructure projects, making them indispensable for a wide array of tasks. With capacities ranging from 375 to 1,250 CFM in diesel portable, trailer-mounted and after-cooled configurations, these compressors are highly versatile, reliable, and made to ensure we can match your specific power needs precisely. For lighter-duty applications, see our portable air compressor hire range.
Need a heavy duty compressor? Visit one of our Onsite Rentals branches, or call us on 13 40 40 for more information.
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Onsite Rentals’ high CFM air compressor rental range, from 375 to 1,250 CFM, supports high-output pneumatic and air-powered applications across mid-sized to large-scale construction, mining, civil works, and heavy industrial sites. Compressors in this CFM bracket are built for multi-tool operations, continuous-duty work, and larger-scale jobs where higher air volume is required.
Typical applications include:
Large-scale surface preparation, multi-pot blast operations, and structural steel cleaning.
Powering hammer drills, rock breakers, and pneumatic drilling rigs in mining and civil works.
High-volume compressed air for pipeline integrity testing, pressure vessel checks, and pneumatic pigging.
Running multiple jackhammers, impact wrenches, or air tools simultaneously without compressor cycling.
Higher air volume for production-line, marine, and large-area coating work.
Sustained high-CFM output for planned shutdown work, plant turnarounds, and multi-shift continuous operations.
Clean, dry compressed air for instrument lines, coatings, and process applications.
Finding the best medium sized air compressor for your project is the most important hire decision. As a general guide, calculate the combined CFM rating of every tool that will run simultaneously, add a 20-30% buffer for line losses, and select the unit that meets or exceeds that total. The table below maps common mid-sized to large-scale applications to recommended air compressors with high CFM in the Onsite Rentals range.
| Application | CFM Required | Recommended Unit |
|---|---|---|
| Single rock drill or large jackhammer | 250-400 CFM | 375 CFM unit |
| Multi-tool pneumatic operations (3-4 tools) | 400-500 CFM | 425 CFM after-cooled |
| Sandblasting (multi-pot setup) | 400-600 CFM | 425 CFM after-cooled |
| Pipeline integrity testing | 500-800 CFM | 425 CFM after-cooled |
| Heavy-duty rock drilling / mining operations | 1,000-1,250 CFM | 1,250 CFM unit |
For specialist output requirements, speak to a local branch for a tailored recommendation.
Onsite Rentals has been a specialist B2B equipment and air compressor hire supplier for over 30 years, with a service model built around the realities of mid-sized to large-scale, heavy-duty project work.
Businesses know Onsite Rentals offer the best mid size air compressor rental options because the relationship goes beyond the transactional. With 35+ branches Australia-wide, we partner with project teams to reduce overheads, improve on-site efficiency, and strengthen safety outcomes across the hire period. We also include scheduled servicing and on-call breakdown cover.
Get high-output compressed air wherever and whenever you need it.
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Onsite Rental Group has over 35 branches Australia wide, investing in branch locations where
we know we can provide value, adaptability, and expert service to our customers.
Talk to our team about our innovative ‘Branch in a Box’ solution that enables us to set up a ‘pop-up’ branch for your large-scale projects as and where needed.
Add up the CFM rating of every air tool that will run simultaneously, then add a 25-30% buffer for line losses, leaks, and demand peaks. The compressor output should meet or exceed that total.
Portable (smaller-frame) air compressors cover 175 to 187 CFM and suit single-tool or lighter-duty work. Medium air compressors cover 375 to 1,250 CFM and are built for medium to large-scale projects where multi-tool operation or continuous-duty output is required.
Yes. The medium range is designed for shutdowns, turnarounds, and sustained high-CFM output across multiple shifts. Scheduled servicing is included in the hire agreement, with on-call field support if anything goes down between planned visits.
After-cooled compressors remove moisture from the compressed air before it reaches the tool, which is important for spray painting, blasting on coated steel, instrument lines, and any moisture-sensitive process. Standard units suit applications where moisture in the air supply is not a concern.
Yes. Onsite Rentals has 35+ branches across Australia, covering all mainland states and major mining, oil and gas, and infrastructure regions.