Thread: air compressor info

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Since I just went through upgrading our shop compressor, I might be able to give some helpful info.

It all depends on what you want to do and how much you intend on using it. In the compressor world, more money really does mean a better unit. For years I got by with a little Sears 20 gallon, 2 hp compressor on wheels. Painted several boats and all of my roadster with it. It would also run tools like an impact, but would not do tools that required lots of cfms like DA's or grinders.

About 8 years ago we moved up to one like you are describing. 60 gallon, 6 HP, and it was much better, but still would not support DA's for very long or sandblasters. (It could not keep up and ran continuously) So we added a second identical unit, except 7 hp. They would still run continuously when trying hi demand tools, until the first unit finally burned up and we started to canabalize it for parts to keep the other one alive.

Last month I decided to upgrade, but didn't want to lay out $ 2000 for the one I wanted, so I bought a 3 cylinder compressor head (only) and an industrial 5 hp motor for Eaton compressor co. Although it is only 5 hp 220 volt, this motor is at least twice the size of the other motors I had and weighs 110 lbs. I had to build a special steel base out of 2 x 4 tubing for it to sit on, and used one of the former 60 gallon tanks in conjunction with it.

I finally got it running last week and what a difference. You can't hear it running hardly, and it only runs for a minute to refill when grinding or DA-ing. Haven't used the sandblast cabinet with it yet, but I know it will be much better. I am in for only a thousand bucks doing it this way.

Anyway, if you are just the occasional hobbiest and don't plan on using tools like a DA sander or sandblast cabinet, you will probably be ok. Obviuosly, an aluminum compressor is not as good as a cast iron version, and two cylinders are better than one, but it all depends on your budget and needs.

Hope this long story sheds some light for you.

Don