Compressor not enough?

[jtyson]

New guy here. Got a new tool for Xmas and tried using it yesterday. It is a Snap On PS4612 Orbital Palm Sander. Issue is, my compressor just plain can't run it. I let build to around 100 psi, hit it, and within 10 seconds, I'm working with 40 psi. The compressor is 28 gallons rated for 5.2 cfm @90psi. From what I can tell online, the sander only asks for 2 CFM @ 90psi.

Is my compressor toast? It is a hand me down. I may have access to a much larger twin piston 60 gallon, but I'm not living in a permanent place and wiring a new 220v in wouldn't be ideal.

Ultimately, I don't use many pneumatic tools, but plan to paint a couple of my bikes this winter, and need my sanders to work, because I am really tired of cutting by hand.

 

[Jas29]

I highly doubt its 2 CFM @ 90 psi. I think it would be closer to 11-15 CFM at 90 PSI

I didn't do any research on your orbital palm sander

 

[Skin]

CFM is a worthless number unless its defined. The one you care about is SCFM. Pneumatic sanders are some of the most taxing things you can run on a compressor.

 

[brownfaux]

I googled the sander, it's 14 SCFM

http://buy1.snapon.com/catalog/item...6&group_ID=675144&store=australia&dir=catalog


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[kams1973]

The compressor is not toast, just simply not designed to run your sander. Kinda like a VW Bug pulling a fifth wheel camper.

 

[Gary S]

I googled the sander, it's 14 SCFM[/URL]

Yep, 2 cfm spinning in free air, 14 cfm under load when sanding. It will work as long as you spin it and don't use it for sanding, or if you get a compressor that delivers 20-30 cfm.

 

[Mazdaspeed]

10 seconds from 100 to 40psi on a 28 gallon tank? Is that an accurate time measurement? Even with a blow gun wide open it takes a fair bit longer than that to empty my 26 gallon. Also did you let your compressor fill until it shuts off?

 

[jkwilson]

The compressor is not toast, just simply not designed to run your sander. Kinda like a VW Bug pulling a fifth wheel camper.

Like http://www.google.com/url?sa=t&rct=...=ygodr9GZDCnatqXnnK7Uyg&bvm=bv.58187178,d.cWc

 

[jtyson]

Guess I was reading wrong on the specs I saw online. Makes sense why it wasn't running it. 2 cfm vs 14 cfm. I'm not big on air tools so thank you for clearing that up for me.

As for the 10 seconds, I didn't time it, just an estimate. This compressor is probably 15 years old and a bit tired so I wouldn't be surprised if it didn't perform like it did in the beginning. Wasn't mine then so I couldn't say. The cut off switch on the compressor doesn't work. It just keeps running non stop.

Guess I need a bigger compressor. The larger one I have access to I don't know the specs on. Also a hand me down from my uncle who used to have a shop at his house. Though I imagine it must be more capable than this little craftsman in the garage now.

 

[kams1973]

Like http://www.google.com/url?sa=t&rct=...=ygodr9GZDCnatqXnnK7Uyg&bvm=bv.58187178,d.cWc

I knew I was going to eat my words after I typed that.

 

[bad12jr]

That's what video popped into my head when I read that.

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[jtyson]

I went and picked up another hand me down compressor. The twin one was gone, but I ended up with this one, which I don't know the specs on, because at some point someone thought it would be a great idea to paint the whole thing. Anyway, it should easily be better than what I have, once I do a little work to it. Have to fix the mounts, fix a small oil leak and get the thing wired.

The wiring is where I'm hoping you guys may be able to help me here. I'm no electrician, but I have wired a few things here and there. I'm going to need to wire both the machine, and put a new breaker in the box. I'm looking for advice on both.

The service to the garage is only 50 amp. I have a fridge, deep freezer and lights in there. Otherwise, any other equipment I use is one at a time. I'm hoping to be able to install a circuit that I can use for both my welder, and this compressor, although not at the same time. Welder is a Miller 211 (multi voltage) that I currently just run on 110v and that is okay, but since I'll be installing a larger service, being able to use it on that too would be great. If I can't, oh well, save that for another day or another house. I've attached a picture of the spec sheet on the motor, as well as the pressure switch, and I'm hoping someone can either help direct me, or point me towards somewhere that can.

I appreciate any information anyone has. Although, if you are going to advise that I hire an electrician, I would love to, but it just isn't in the budget.

Thanks!