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Old 06-02-2006, 07:15 PM
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Another Air Compressor question

I'm trying to make up my mind between one of three different compressors and need some help. The first is a Ingersoll-Rand 60gal tank with a 5Hp motor single stage. The second is the Husky 60gal tank two stage. The third is a craftsman 60gal tank two stage.

I know the two stage is quiter than the single but just how much. Is it better to go with the two stage over the better brand? They all three have almost the same cfm ratings. I do want a quite compressor but how much of a difference is there really? Any other reasons to go with a two stage besides noise and heat?

Thanks,

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Old 06-03-2006, 08:09 AM
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First is this the IR you are talking about?

http://www.northerntool.com/webapp/w..._211720_211720

If so you can not go by those ridiculously inflated "tank assisted CFM" numbers. This is the new scam they are trying to use since people have finally caught on to the "peak HP" nonsense. I noticed that Tractor Supply, to their credit, has reduced the CFM claim on this thing to a more believable 11.3 CFM@90 PSI. The Ingersoll is well built for a single stage compressor but a two stage is such a more efficient design they really are not in the same performance class assuming they use the same HP. ( true HP, not "peak" ) There really is not much difference quality wise between the Craftsman and the Husky so you should let the price and service availability be the deciding factor here. Although I think the Craftsman is about the same quality as the Husky you can for sure count on Sears for service and parts if needed. If the IR is "peak" rated then it is really only about 3 - 3 1/2 true HP (15 AMPs) and can only be counted on to produce around 11 - 12 CFM but if that 5 HP is real running HP (about 24 AMPs or more), and on the IR it probably is, then it will produce around 13 CFM and maybe a bit more but NOT that ridiculous 18+ CFM claimed by some places that sell the thing. By all means go with the two stage if you can since there is a lot more to it than just noise, the two stage is not only quieter but it also runs lot cooler, will last longer and pumps more air due to the more efficient design.
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Old 06-07-2006, 10:22 AM
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Definetly 2-stage. As Old Red said.

Also, most single stage compressors will get below 90 psi before
kicking on. A lot of air tools, especially sanders, need 90 psi all the time.
The single stage ones I've had just can't maintain that.
My 2-stage cuts off at 150 psi but more importantly it kicks on
at 120 psi., so I maintain 90 psi to the tool all the time.

If you want a quiet and cool compressor, look at the Eaton brand.
That's what I decided on and they really do proiduce much less
heat/water. They do cost more, but for what you get they're a bargain.
Their 5hp outperforms most others 7hp's
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