Air compressors

[Archive]

Any ideas on what type would be a good choice for home use. I want one that will drive a decent impact wrench, but not looking to go overboard on price. How many CFM's at 90 psi is necessary for the shade tree mechanic ? Thanks in advance.

Scott W.

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[Archive]

Bigsaint-You didn't specify if you wanted gas or electric, and if electric-110 or 220 vac.
Your plain ole Sears will sell you a 12 gal. /2
HP that will pump 2. 6 cfm @ 90 PSI. That will get you enough to run a 3/8" drive butterfly and/or a 3/8" drive ratchet, or a 1/2" drive impact for a short time... that's about $190. 00. They go up from there in size and $$. A 1/2" drive impact needs prox. 4. 5 cfm @ 90 psi, a 3/8" drill motor needs prox. 7. 5 cfm @ 90 psi, a reg. paint gun takes prox. 4. 5 cfm @ 45 psi. I have two units-one is a 7. 5 hp gas
that pumps somewhere around 10 cfm @ 120 psi, and a 110v that pumps about 5 cfm @ 100 psi. The problem with the electric unit is that when it cycles, it pulls prox. 18 amps, and it is enough to trip the breaker from time to time... sorry for the lenght of this post.

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[Archive]

Thanks Dave. I should have specified electric, 110. I want it to be able to remove the wheel lugs and similar items, although it will probably see more use inflating rafts, etc. for the kids. I'm not worried too much about the breaker box (good info though,thanks) as my house was originally wired for electric heat which I have since removed and now have ALOT of space in. Is any brand better than the other. The local Home Depot has Campbell Hausfeld, Husky and Ingersoll-Rand. Any specific brand to avoid ?

Scott W.

 

[Archive]

Scott, I would stay away from the direct drive "oil less" type compressors. We had one and when my boy pushed it hard doing some sanding and body work, we picked up the pieces off the floor. It literally blew the rod through the housing and on the floor.

We got a 5HP belt drive unit that puts out about 10 CFM at 90 PSI, mounted on a vertical tank. It has done real well. I'm on a trip and can't remember for sure but I think it is an Ingersol-Rand. Paid $400 on sale at the local tool supply.

When we bought it, we were told it was not an industrial unit and it would not take running all day long day in and day out.



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Stan
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[Archive]

Scott, The Ingersoll-Rand is the best of the three, look for the hishest cfm number at listed pressures, usually 90,125 or 175. I have a 7. 5 horse on an 80 gallon tank puts out about 20 cfm at 175 psi it seems like you can never have a big enough compressor the only thing is above approx. 2-3 hp you will have to go with 220 volt. you also want the bigest tank in the size you decide on for reserve capacity ( to keep the motor from running all the time