Thread: air compressor info

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Hope (since you didn't make reference to it specifically) when you say "...big enough for what I do...." you're referring to cfm of output at working pressure because that's probably the most important spec. People get all wrapped around h.p. and tank size and iron vs. aluminum which is all interesting stuff, but it's where the razzle dazzle snake oil sales stuff happens. First consideration should be cfm output to match the tools you're going to use and the duty cycles. Some folks think you have to have a two stage to get the job done. Two stage is good for building higher pressures, but most of what we do with cars doesn't need over 125psi. Higher pressure is not the same as higher volume. A high volume single stage is just fine if it's a good, and properly sized unit.

As for your specific question, personal opinion here, i'd be a little leary of the difference in expansion rate between iron and aluminum. In the short run, and in light duty service, it's probably a none issue. If you're filling bicycle tires once in a while it's fine. If you're going to be running a d.a., bead blast cabinet, or die grinders all day and the pump has to work constantly to keep up then you probably aren't going to like it.

Look, doing stuff like that tells you loud and clear the manufacturer is building down to a price, not up to a quality rating. So buyer beware.

Edit, I see Don replied at the same time I was typing. Here's the company he's talking about www.eatoncompressor.com. If you read some of the stuff in their "single phase" listings you'll learn more. Not saying they're the only place to buy, but they are a good outfit. I have the same 3 cylinder unit Don describes and it fills the tank faster than I can empty it............that's a big part of what you want.