Sears 3 hp - Can I install a larger tank?

by Jerry
(Milwaukee WI)

I have an old Sears 3 hp belt driven 33 gallon compressor,220 volt. Can I install the motor and pump on to a 60 gallon tank?


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Bill says...

Sure, Jerry. You can install any motor and any compressor pump on any size tank you want.

You just have to be sure that you do not exceed the motor/pump duty cycle, and I suggest you read the page relating to this topic on this site.

Cheers,

Bill

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Apr 10, 2011
Increased air storage
by: Jack Waters

I was considering something similar. I was thinking of trying to find a used tank and tying it into my air plumbing to give me extra capacity. What is the section on compressor / pump called? How do I find it.

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From the site map page, look for Duty Cycle and you also want to read Add A Tank. Heck, you should read the whole site! :-)

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Sears 4hp/25 gal. tank compressor - Can you increase the CFM's on a compressor?

by Brad Pederson
(Oak Park Heights, Minnesota)

Good Day,
I have a Sears 4hp/25 gal. tank compressor. I would like to run a sander that needs 7 to 9 CFM's and this compressor does not provide that.

Is there a way to increase cfm output?

I have heard that it might be possible by linking two compressors together. If this is possible how big would the second compressor have to be and how would you link them. If not how large of a compressor do I need to purchase in order to get 7 to 9 CFM's. Any information would be greatley appreciated.

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Bill says...

You neglect to inform what pressure the tool needs 7/9 CFM's at.

You can generally assume you will get somewhere in the area of 3-4 CFM of compressed air flow at 90 PSI for each HP of compressor motor size.

Yes, you can run a number of compressors simultaneously to increase the flow to your tool.

Essentially, by doing that, what you are doing is providing a bigger compressor to get the flow you need, and that, essentially, is the answer to your question.

If you one compressor cannot provide enough pressure and flow for your air tool, you need a bigger air compressor if you want to be satisfied by the results.

You also need to do your homework about what size you need, and that's covered extensively on the Sizing pages linked from the nav bar.

Cheers,

Bill

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