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Any suggestions on compressor sizes?

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Slappy

11-17-2001 07:56:27




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I am a restoration novice and am getting ready to purchace my first air compressor. I want to be able to use it to paint and sandblast my tractor, implements, trailer, etc. My question is, will a 20 gal compressor set up like you might purchase at Walmart meet my needs? I won't be using it every day just for my weekend restoration projects. Any advice would be greatly appreciated.




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LarryG

12-07-2001 06:22:39




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 Re: Any suggestions on compressor sizes? in reply to Slappy, 11-17-2001 07:56:27  
...and when you are looking at cfm consumption for tools, be aware that tool mfr's can assume a duty cycle for the tool that is less than 100% - that is it will consume a lot more than the listed consumption rate on a steady basis. They take into account that you are going to stand back with the tool in your hand admiring your fine work part of the time.



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bill b va

11-18-2001 07:16:57




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 Re: Any suggestions on compressor sizes? in reply to Slappy, 11-17-2001 07:56:27  

my suggestion on compressor size is to compare the pumping size in cfm with the the highest tool tool consumtion in cfm. the tank size means very little . the compressor cfm pumping capacity ( cubic feet per minute) should be availiable in the data sheet and or plate . same with the consumsion for the tool.although not very accurate horse power means a lot more than tank size to me. look at the compressors that contractors use for really high use tools like big sandblasters , jack hammers and rock drills they dont have large tanks just a lot of pumping capacity . bill b va

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Franz

11-17-2001 17:56:07




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 Re: Any suggestions on compressor sizes? in reply to Slappy, 11-17-2001 07:56:27  
Slappy, keep the money for the 20 gallon compressor in your pocket till you can afford to buy a real machine.
Even if you'll only occasionally use the machine, buy yourself a good cast iron, belt driven, slow turning compressor with at least a 60 gal tank, prefferably one of the older machines. Also stay far away from anything oilless.
The new aluminum casting direct drive machines ain't worth draggin home, and you'll be sorry you bought it long before you remember what a fantastic deal you got on it. You can usually pick up some good machines at auctions, not Ebay, real auctions.

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Cliff Neubauer

11-17-2001 09:55:21




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 Re: Any suggestions on compressor sizes? in reply to Slappy, 11-17-2001 07:56:27  
I started with a 20 gallon compressor that put out about 6.5 cfm @ 90 psi but I wouldn't recremend it, you will spend most of your time waiting for it to pump up. The bare minimum you want is 10cfm @90 psi for painting and 20cfm would be better for a sand blaster. You will never be sorry for buying a bigger air compressor!



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Bill L

11-17-2001 16:41:09




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 Re: Re: Any suggestions on compressor sizes? in reply to Cliff Neubauer, 11-17-2001 09:55:21  
Do yourself a favor and get the bigger compressor.Both a cabinet sandblaster and a pressure blaster uses lots of air. Mine is 27 cubic feet with an 80 gallon tank and I can keep it running when doing a lot of blasting. the bigger the nozzle the more air you use . It is also real handy when I have to get out the 1 inch impact wrench for the really bad stuff.



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Slappy

11-18-2001 07:03:03




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 Re: Re: Re: Any suggestions on compressor sizes? in reply to Bill L, 11-17-2001 16:41:09  
Thanks guys, I'll save up for a bigger compressor.



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Rusty Jones

11-25-2001 17:21:36




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 Re: Re: Re: Re: Any suggestions on compressor sizes? in reply to Slappy, 11-18-2001 07:03:03  
When buying an air compressor, look for the CFM, which means cubic feet per minute. Any air compressor will pump up 100 lbs., but the CFM is most important. The info you got from the other correspondents is good. Also, think about getting the vertical type, as you can stick it in the corner of the garage and it'll be out of the way. I bought an Emglo compressor, and it has given me very good usage, for painting, sanding with air tools, and sand blasting. Note: When sand blasting, stay far away from the compressor air intake, as it will suck in sand if you're not careful, thusly ruining the rings, etc. My compressor will keep up to air tools and for painting, altho it runs continuously for air tools, but catches up quickly. When you are ready, go to a store that specializes in auto paint and supplies, and buy what they recommend. Sears sells light duty compressors, but I don't think they'll stand up to hard usage over the years! Remember, don't go for air pressure, go for top CFM! Yours: Rusty Jones
p.s.: be prepared to pay around $900 to $1500 for new, altho you may be able to find a good used one for less. look for garages and body shops having a "going out of business sale", but don't buy one that looks neglected!

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