As some of you know, I just rebuilt an old quincy 310. I calculated the cfm and it comes out right around 10.5. I would like to eventually get a small blast cabinet and probably paint some stuff as well. If I can get a good price for it, what should I upgrade to? Thinking about 18cfm in the 750-900 range. Also, what should I ask for the quincy?
contemplating selling my quincy
- Thread starter mrpizza
- Start date
A couple of questions that will narrow things up some:
Are you talking about getting just a larger pump and using existing tank, motor, etc or a complete functioning assembly?
Selling the complete air compressor the Quincy is on or just the pump?
www.surplussupply.com carries Rol-Air at reasonable prices from what I've seen.
Are you talking about getting just a larger pump and using existing tank, motor, etc or a complete functioning assembly?
Selling the complete air compressor the Quincy is on or just the pump?
www.surplussupply.com carries Rol-Air at reasonable prices from what I've seen.
If I may, I would suggest that you buy an additional compressor in the 10-12 cfm range. When you need to run the big stuff you put both compressors online, but for only regular stuff just have one online. This assumes that you are a typical garage type user and not a full time shop.
lg
no neat sig line
WhoWhatNow
Well-known member
I think it depends on how much you are going to be blasting. I did a lathe refresh for a buddy last year and I blasted the bed, headstock and tailstock using a hand held sandblaster (Speed Blaster http://www.amazon.com/dp/B0013HBZEY/?tag=atomicindus08-20) and aluminum oxide. I was using my old Porta Cable single stage. It is something like 6.4cfm at 90psi sitting on top of a 30gal tank. It ran the entire time but it got the job done. Since I was using a hand held blaster I had to stop to refill it every 10min or so that probably gave the compressor a chance to catch up a little. If you are just a home hobbyist it probably is not a big deal having to wait a little. In a professional environment that would not be acceptable. It was fun sitting on a milk crate on the side of the house on a nice summer day blasting away. Painting may be a different story since you need to keep the edge wet.
You did an awesome job rebuilding that compressor. It would be a shame to sell in before you even broke it in. My suggestion is to start using it and see if you really need a bigger one. I doubt you would be able to sell it for enough to fund the purchase of a larger two-stage compressor.
My lathe refersh:
http://garagejournal.com/forum/showthread.php?t=126491
You did an awesome job rebuilding that compressor. It would be a shame to sell in before you even broke it in. My suggestion is to start using it and see if you really need a bigger one. I doubt you would be able to sell it for enough to fund the purchase of a larger two-stage compressor.
My lathe refersh:
http://garagejournal.com/forum/showthread.php?t=126491
I already have someone interested in it for a good price. Im looking at the IR ss5l5. Another reason I want to sell it is because I don't use it enough to keep the head from rusting again, and I think its better served for someone who will use it a lot more.
WhoWhatNow
Well-known member
Sounds like you have a plan. Just be careful with the IR's. I have read that they have a habbit of burning up the motor in a few years(think sparks and fire). A few forums have posts with horror stories tring to get them replaced by IR as well. That said, I have no presonal experiance with them. I think some people have not trouble with them at all.
Can anyone recommend a good compressor in the 800 dollar range?
Now, if I am only going to sandblast very very rarely, would I be better off getting a model that puts out around 12-13 cfm at 90psi and then use the extra cash to buy air tools? I think I can blast with a unit of that size, just would have to wait at times. I need an impact and some sockets, maybe a 1/4" ratchet, my 3/8" one is LOUD!
When I say blast cabinet, I mean one of the small benchtop models. Not going to be doing huge items!
Now, if I am only going to sandblast very very rarely, would I be better off getting a model that puts out around 12-13 cfm at 90psi and then use the extra cash to buy air tools? I think I can blast with a unit of that size, just would have to wait at times. I need an impact and some sockets, maybe a 1/4" ratchet, my 3/8" one is LOUD!
When I say blast cabinet, I mean one of the small benchtop models. Not going to be doing huge items!
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Bump for the dinner rush!
I think I am going to take a hard look at the 60 gallon 3.5hp Kobalt at Lowes. Being in the military I get a 10% discount on it, so It would come to 480 after taxes for me. Would you guys recommend that for my described uses?
I think I am going to take a hard look at the 60 gallon 3.5hp Kobalt at Lowes. Being in the military I get a 10% discount on it, so It would come to 480 after taxes for me. Would you guys recommend that for my described uses?
JASTECH
Well-known member
Miles, On GJ it has been told that IR are not what they use to be and that Quincy outperforms them hands down. Maybe just add larger tank?
When OP posted about blasting Lathe w/portable, is all the blasting material lost/wasted or do you lay something down then filter to recover some?
When OP posted about blasting Lathe w/portable, is all the blasting material lost/wasted or do you lay something down then filter to recover some?
I understand the quincy will outperform other compressors, but I don't want this thing to get rusty due to not being used much. I would much rather this go to someone who can really use it to its full capability. It already has a 60 gallon tank on it, and the most I would ever need to blast that I can tell in the forseeable future is small automotive parts in a benchtop cab.
Good is very vague? How good?
My area is horrible for finding deals on compressors. Actually, horrible for deals on anything I had go over an hour each way to snag this quincy. PT Doc, I completely understand that this will be a step down. By "good" I am implying "not a huge pile of ****!" I appreciate the concern, but I have other reasons for trying to switch. If I sell, I'll post up what else I did to motivate this change.
I have other motivations....
I'll share later
Plus, this quincy needs to be run a lot, which I won't really do.
WhoWhatNow
Well-known member
I put down a tarp and did recover about half the material. I did waste a lot of media and I won't be doing that again. Next time I am going to try to build a frame out of PVC pipe and cover it with plastic. I do like the idea of blasting outside and I don't really have space for a cabinet. Obviously, doing it outside limits when I can blast to nice days, but as a hobbiest that is OK.
If you are thinking about a Kobolt for $430 you might as well keep the Quincy. I realize you are worried about the pump rusting, but I don't really think that will be a problem. From what I have seen when shopping for used compressors they usually only do that when they sit for a very long time in a damp basement and have a pipe disconnected to allow water vapor in. I bet if it runs for even 5-10 minuets every few weeks you will be fine.
If you decide to do a Kobolt, Husky or even a Harbor Freight I think they will do what you need them to for a few years, but they will most likely break at some piont. Parts may not be easy to find when it does.
I may sound like a broken record , but I would again suggest keeping the Quincy until you have a good reason to upgrade, e.i. you find you can't do the job with it or you actually see it begin to rust. Especially if you are on a budget there is no reason to solve a problem you don't yet know you have.
Hope this helps!
Not running it enough to get it to a high enough temp each time will leave too much residual water vapor in the head. The tech at quincy advised me strongly about this. He asked many times if I planned on running it a lot or just here and there.
And I do have high humidity here, Pensacola *****! A_Pmech, where in IL are you from? I grew up in Marion/Carbondale area.
And I do have high humidity here, Pensacola *****! A_Pmech, where in IL are you from? I grew up in Marion/Carbondale area.
The valves inside the head are bare steel as well as the discs that seal them. The sealing is completely dependent on the fact that the disc and inside seat of the valve are clean. These have no check valve to the tank and are not designed to have one. The high pressure discharge valve is the one that keeps the pressure in the tank. The first time I did the valves I ran it to break in and then left it a couple weeks, no leaks. When I ran it up the next time after the couple of weeks the high pressure valve was already leaking a little bit back through the head. I tore it down and found a bit of rust on the seat and disc. So, I know that i will continue to have this problem if I don't heed the quincy tech's advice and run the snot out of it. I have yet to read a thread on here about someone with a reed valve compressor having valve issues, unless its been thousands of hours of run time.
WhoWhatNow
Well-known member
You have a PM
You can run a check valve on a QR-25. My 5120 was fitted with one.
The reason why you never hear about homeowner grade compressors having the leak back problem is because they all run check valves. In those cases the only symptom of a failing valve is reduced output.
effingham, il area here.
The reason why you never hear about homeowner grade compressors having the leak back problem is because they all run check valves. In those cases the only symptom of a failing valve is reduced output.
effingham, il area here.