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09-25-2010, 11:46 PM | #21 | |
Senior Member
Join Date: May 2010
Location: Mpls, MN
Posts: 27,582
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Re: I need/want an air compressor.
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09-26-2010, 09:44 AM | #22 |
Senior Member
Join Date: May 2010
Location: Salado, TX.
Posts: 733
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Re: I need/want an air compressor.
There's all manner of terminology to learn to buy what's "best" for your use. I learned what I know when I had my body shop and had to figure out what I wanted to get to actually do what was necessary. Like so many things, numbers games are played that appeal to peoples lack of understanding.
Above someone started their commentary with volume, volume, volume. That person is knowledgable. Tank volume and compressor volume output are two different things. Large storage is fine, but not a substitute for pump volume. Too many folks focus on pressure. If you look at the tools the typical home "mechanic" uses they're almost always rated for 125 psi max (yeah there's a rare exception or two), then followed by their cfm consumption numbers. It's cfm (cubic feet per minute) that's important for shop tools. Most folks end up regulating pressure down, so why focus on getting a two stage compressor that can do 175 psi? Forget that, if a two stage is a good buy and puts out something around 20 cfm at 100 psi, that's fine, but if a single stage will do that kind of cfm that's fine too.....plus it will generate less heat and perhaps less water. Volume will come in handy when you run a blast cabinet, or a grinder, or any other tool that gobbles big chunks of air (read the spec sheets on the individual tools to see that number). If you do any painting and use an hvlp gun, the hv means high volume, the lp, low pressure (yet another strike against 175 psi as the primary focus). I'm not advocating for this company even though I bought my home shop unit from them, but if you read through some of their commentary you'll learn some things about hp rating, cfm, and so on: http://www.eatoncompressor.com/page/page/504413.htm Learning will save you money in the long run.
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