Most DA air grinders require about 17 CFM to operate. This puts them out of reach for most non-commercial users as a compressor that can handle over $1,500. This grinder requires 5 cfm. A 30-gallon HD Husky Supercharger is all you need for less than $300. I used this 2011 Mustang wet grinder today. It worked like a charm. It's well made, like most Astro instruments. It is very light and manoeuvrable. If you are looking for a pneumatic DA to use with a compressor in your home workshop then this is the one for you.