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Air Compressor Suggestions

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1st Deere

07-10-2001 12:08:35




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I recently bought my first tractor, a '52 JD B. I plan to restore it and will need an air compressor to handle the grinding, sand blasting and painting. I want to make sure that the unit I buy will be enough to handle the job; however, I don't want to over do it. I am considering the Campbell Hausfeld 5.0 hp, 26 gallon model. What are the pros and cons and will this be enough to do the job? Thanks.

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buck

07-10-2001 16:52:46




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 Re: Air Compressor Suggestions in reply to 1st Deere, 07-10-2001 12:08:35  

I agree with Cliff on this get big tank big compressor with high CFM but I would add to have a look at how they get the CFM the best is with big compressor at slow speed--doesn't create as much heat and therefore doesn't create as much misture. If you get a good one it will pay for itself with the less expensive tools you will be able to use.



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Cliff Neubauer

07-10-2001 15:36:27




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 Re: Air Compressor Suggestions in reply to 1st Deere, 07-10-2001 12:08:35  
That air compressor will be too small for restoring a tractor. Ignore the HP ratings, they mean nothing. What you need to look at is CFM ratings, for sanding and painting 12 cfm @90 psi would be the absolute minimum and 15 would be better. I would also go with a 60 or 80 gallon tank but any compressor with that much air flow will have a big tank.



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Kendall

07-11-2001 11:55:39




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 Re: Re: Air Compressor Suggestions in reply to Cliff Neubauer, 07-10-2001 15:36:27  
You're right about the Horsepower. Im amazed at what people are calling 5hp these days. a REAL 5hp compressor cost a lot of money and a REAL 5hp electric motor will be 18 or 20 inches in diameter. A REAL 5hp electric motor running on 220V will draw about 17Amps. Or about 32Amps on 120V. (I think they must be rating them on how much juice they draw the very moment the motor starts.) Go with the CFM, especially if you're sandblasing. If you're just using air tools here and there, you wont need as much. Mine is not a big unit, I think its 9CFM but it does air tools ok, runs out oomph when I get the DA sander or cutoff wheel going for too long. The biggest compressor I ever saw would keep 90psi with a 2inch exhaust pipe!! (it was run buy a Catipiller diesel!!)

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Dusty

07-11-2001 17:41:40




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 Re: Re: Re: Air Compressor Suggestions in reply to Kendall, 07-11-2001 11:55:39  
In the real world 747 watts = 1hp.
amps X volts = watts.

Dusty



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Dale

07-12-2001 09:55:43




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 Re: Re: Re: Re: Air Compressor Suggestions in reply to Dusty, 07-11-2001 17:41:40  
amps X volts = volt amps

amps X volts X powerfactor = watts



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kendall

07-12-2001 15:34:50




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 Re: Re: Re: Re: Re: Air Compressor Suggestions in reply to Dale, 07-12-2001 09:55:43  
I was using a conservative 785 watts = 1hp. And I passed all my college electronics exams with amps X volts = watts. But I must admit that is in DC applications. AC has extra considerations.(thats why I used 785). Still, manufacturers are over rating them.



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