What air compressor are you using?

I have a Eaton 5HP 60 gallon. so far so good.
It puts as much or more air out as most of the cheaper 7.5 HP's.
I couldn't get by with anything smaller, it's 17CFM @90
 
I've got an old 1975 Emglo with a Eaton/Wayne pump. I rebuilt it in 06' and it's still working fine. I bought another 120gal setup for backup with a rebuilt pump but need to get a single phase motor to get it operational. The three phase motor on it now has to weigh at least a 100lbs
 
Again I want to thank everyone for their input. It is helping me gather information so when the time comes I will hopefully be able to make an educated decision.

Kelly
 
My 10hp Eaton or 7.5 Quincy run the blaster OK but you have to run 1/8" or smaller tips or they tend to run down to around 60psi and hold it. This is for frames and such. For sheet metal blasting at 30 psi they will maintain all day. 60psi is a little low combined with the smaller tip is a combination I don't have patience for. On paper the 10hp should have easilly outperformed the 7.5hp Quincy but they were pretty comparable. Maybe the Eaton made a little more air but as soon as I turn on the 3hp also then it's over.

I have a pto driven setup with two very large quincy's that I run for blasting. More craiglist cobbling on that one also.

This might help answer one of your earlier questions.
 
I've thought about building a gas engine driven dual compressor setup for blasting.
 
We're looking for a 185 cfm diesel powered, the kind that comes as a little trailer for blasting. It needs a big honkin' aftercooler to work well though.
 
crashtech;n72806 said:
We're looking for a 185 cfm diesel powered, the kind that comes as a little trailer for blasting. It needs a big honkin' aftercooler to work well though.
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Good Lord..... 185cfm? are you going to start paint bridges and paint with SPI Epoxy :cheerful:. I would think you might find one used at a rental store they sell their stuff sometimes, the ones used for an air powered jack jammer should work.
 
I was going to buy a tow behind for blasting but really didn't want another powetrain around here to maintain. I already maintain the tractor and it does it some good.

I also know if you have a problem with one of screwcompressor type tow rigs that it's huge dollars. One that I could afford scared me because they have a zillion hours so between maintenance and fear of pumping oil onto my blasted parts I made mine. Mine is only around 90 cfm's at 175psi which is plenty blasting at 30-100 psi as the cfm's go up. I think for one man blasting a machine with 100 cfm's should be a decent target point. I run .25" blasting nozzles and it's a decent fit. If I had more air I might put a bigger one on for frames and such.

I scrapped the 270 gmc engine/trans out of my shop truck but for a moment it was going to power my compressor.

I think for the average shop looking for a tow behind, the Grimmer/ Schmidt is a nice unit. They use a 302 ford engine running on 4 cylinders and 4 cylinders pumping air. They have stopped making them but a lot of rental places used them. Rebuild the 302 so you know the rings are sealing good and away you go. Probably a rock and stick will repair it.
 
I'm surely not up on that requirement that's for sure. I thought it was a joke when I seen the cfm numbers, my bad. Spot blasting and smaller cabnet basting is all I have experiance on that subject.
 
Well, cfm requirement depends on nozzle size and PSI, but the requirements can get much larger than the reciprocating models we generally use in our shops.

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Direct link because the forum displays images too small:
http://i57.tinypic.com/jsnl9c.jpg
 
i have about 30 cfm or so with my eaton. i generally run a #3 tip and it will hold about 70-75psi or so. its fine for most bike stuff i do around here or the occasional panel etc. it would take forever to do a whole car. no way am i doing that. at one time i had a tow behind diesel here that put out 185cfm. i gotta say that your actually gettin somewhere when you run that thing. it was truly the way to go if you have alot of sqft to blast. i would run a 3/8" nozzle with that and would strip a 4-6" dia circle as fast as i could move. if your looking to do complete cars then its a must to have alot of cfm. it is expensive though. both the compressor and the equipment. i have a real good pot and the maintenance just on that was gettin old real quick.
 
I know this might sound strange from a guy who’s all about compressed air…

… but did you ever wonder WHY and IF you really need to use compressed air?

It might have been a very bad decision to make use of compressed air for your tools, machines, actuators, etc.

Sure, some applications DEMAND compressed air. It’s simply the only real option for it.

And I know, compressed air and has many upsides:

– compressed air tools are very powerful
– they are safe to use
– can operate in very dirty environments
– are cheaper compared to their electrical counterparts
– can last a lifetime.
 
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