Author Topic: noob ?'s regarding compressor/ air tools  (Read 2287 times)

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Offline greasy j

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noob ?'s regarding compressor/ air tools
« on: November 06, 2009, 10:11:26 AM »
just got a Husky pro 5 hp(peak) 26 gal 5.8 cfm/90psi, cast iron, uses oil. very good condition apparently. came with oil collector filter unit, nice hose/fittings, old Kosta? spray gun, Mac tools die grinder, air pick/chisel from Jiffy air tool, tire inflator. all for $200

no manual.

it stays on when you're using it. I thought it would get up to pressure then click off. does this mean I have a leak? it says 100% duty cycle. does that mean it is supposed to stay on? when I turn it off it hisses until the pressure has been released. this is normal? or another indication of a leak? seems to work fine besides the staying on.

obviously I don't have a lot of experience with compressors and air tools. I've sprayed paint with my old bosses compressor but other than that I've always used a portable hvlp all-in-one unit.

I'm also wondering what kind of attachments will work with the mac die grinder. it seems larger than a normal die grinder? I measured the opening at the collet at 7mm. compared to my dremel or rotozip that is much larger. and the collet is permanently attached to the shaft. most attachments for die grinders look about the same size as a dremel attachment and say they are for 1/4" units. is this just a larger die grinder? or something else. the guy who sold it called it a buffer. I'd love to use it as such.

help the ignorant! thanks.

some pics of the air tools, bonus points if you can tell me something about the spray gun :P





thanks!!!

Offline greasy j

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Re: noob ?'s regarding compressor/ air tools
« Reply #1 on: November 06, 2009, 10:24:19 AM »
oh crap. I just found where the hissing was coming from. there is a pinhole in the tank where the top bracket to hold the engine is welded to the tank.

can I fix this? weld it? easier way to fix?

Offline Inigo Montoya

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Re: noob ?'s regarding compressor/ air tools
« Reply #2 on: November 06, 2009, 12:00:49 PM »
Given the air pressure, a weld is probably the only option. But I would get it tested before using it further. I would hate to see the effects of 120+ psi explosion.

Offline mark

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Re: noob ?'s regarding compressor/ air tools
« Reply #3 on: November 06, 2009, 12:01:44 PM »
the die grinder uses 1/4" attachments. metal burs, mounted stones, wire brushes, grinding discs... etc. WEAR YOUR GOGGLES!!!

spray gun looks like a spray gun alright. not familiar with the brand.

an air compressor with a tank should shut off when a set pressure is reached.

an air tank with a hole in it is a bomb.

run away quickly.



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Offline mrblasty

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Re: noob ?'s regarding compressor/ air tools
« Reply #4 on: November 06, 2009, 01:43:24 PM »
I would weld the pin hole, are you any good at mig welding?  I think Campbell Hausfeld makes the compressor and Husky puts their name on it.
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Offline bucky katt

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Re: noob ?'s regarding compressor/ air tools
« Reply #5 on: November 06, 2009, 02:29:21 PM »
just got a Husky pro 5 hp(peak) 26 gal 5.8 cfm/90psi, cast iron, uses oil. very good condition apparently. came with oil collector filter unit, nice hose/fittings, old Kosta? spray gun, Mac tools die grinder, air pick/chisel from Jiffy air tool, tire inflator. all for $200

no manual.

it stays on when you're using it. I thought it would get up to pressure then click off. does this mean I have a leak? it says 100% duty cycle. does that mean it is supposed to stay on? when I turn it off it hisses until the pressure has been released. this is normal? or another indication of a leak? seems to work fine besides the staying on.

obviously I don't have a lot of experience with compressors and air tools. I've sprayed paint with my old bosses compressor but other than that I've always used a portable hvlp all-in-one unit.

I'm also wondering what kind of attachments will work with the mac die grinder. it seems larger than a normal die grinder? I measured the opening at the collet at 7mm. compared to my dremel or rotozip that is much larger. and the collet is permanently attached to the shaft. most attachments for die grinders look about the same size as a dremel attachment and say they are for 1/4" units. is this just a larger die grinder? or something else. the guy who sold it called it a buffer. I'd love to use it as such.

help the ignorant! thanks.

some pics of the air tools, bonus points if you can tell me something about the spray gun :P





thanks!!!

i have a 33 gallon craftsman compressor and it stays on pretty much constantly if i use a die grinder, cut off wheel or air drill. using the impact wrenches or the hvlp paint gun it does switch on and off though. i just got a couple of packages of carbide bits to fit the die grinder so i can do some cylinder head porting. i did air cooled vw heads in the 90's and i might start doing them again.
Of all God's creatures there is only one that cannot be made the slave of the lash. That one is the cat. If man could be crossed with the cat it would improve man, but it would deteriorate the cat.
Mark Twain - Notebook, 1894

Offline greasy j

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Re: noob ?'s regarding compressor/ air tools
« Reply #6 on: November 06, 2009, 07:45:54 PM »
at my buddies house right now. we're trying to weld the pinhole but air keeps escaping out the end of the weld. very frustrating. it's at the top where the engine mounting bracket is welded to the tank. there is a curve and I think the air is escaping along the curve under the weld. not sure what else to try.

Offline bucky katt

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Re: noob ?'s regarding compressor/ air tools
« Reply #7 on: November 06, 2009, 07:55:44 PM »
try brazing it?
Of all God's creatures there is only one that cannot be made the slave of the lash. That one is the cat. If man could be crossed with the cat it would improve man, but it would deteriorate the cat.
Mark Twain - Notebook, 1894

Offline mystic_1

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Re: noob ?'s regarding compressor/ air tools
« Reply #8 on: November 06, 2009, 08:22:17 PM »
Personally I'd get a replacement tank.

Welding on a compressor tank, unless you're VERY good at welding and have the knowledge to properly weld pressure vessels, is an accident waiting to happen IMO.

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Offline greasy j

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Re: noob ?'s regarding compressor/ air tools
« Reply #9 on: November 06, 2009, 09:58:39 PM »
well, we got it the best we could but there is still a tiny bit of air leaking out along the channel/groove at the end of the weld. it does stop after pressuring up, I just didn't realize how long it takes for a tank this big.

the amount of air leaking out now is super tiny. you can put your finger on it and pretty much stop it. the weld just doesn't get far enough into the corner along the channel. my buddy mentioned that a lot of people's air lines leak more than this pin hole does so it might not be that big of a deal. I am going to try slathering the whole area with epoxy resin. see if that works.

the die grinder is bigger than a 1/4" die grinder. might be hard to find attachments. I took the spray gun apart and cleaned and lubricated everything that needs it. it works nice now. haven't put paint in it yet, but it should be good for a touch up gun.

thanks for the input and suggestions everybody. it was nice to check this from my buddy's house and see all the replies. I can always count on this forum.

Offline greasy j

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Re: noob ?'s regarding compressor/ air tools
« Reply #10 on: November 07, 2009, 11:30:59 AM »
I stand corrected, call me a tard.

I just compared to one at OSH and it is a 1/4" die grinder. the one we were comparing it to before was a mini I guess? maybe they come in 1/8" also.

don't mind being wrong cuz this means I can use the hell out of it!!!!!!

thanks for the info Mark. if you don't hear from me, the bomb went off!

 ;)

Offline Inigo Montoya

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Re: noob ?'s regarding compressor/ air tools
« Reply #11 on: November 07, 2009, 02:51:25 PM »
The bomb is what I worry about. If you got a hole there, you have to wonder how thin the tank metal is elsewhere. That is why you should see if some place there will test it.

Offline greasy j

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Re: noob ?'s regarding compressor/ air tools
« Reply #12 on: November 07, 2009, 04:59:46 PM »
The bomb is what I worry about. If you got a hole there, you have to wonder how thin the tank metal is elsewhere. That is why you should see if some place there will test it.

I think the pinhole is a failure of the original weld, not the tank. it is right in the corner of the weld. the tank is only 3 yrs. old. but I think you're right. better safe...

I'll see if I can find a place that'll check it.

the epoxy resin I got is supposed to be good up to 20,000 psi or something crazy like that. the tank has a max of 135 psi. I might just try it and see. go in the other room while it gets up to pressure just in case. :o

thanks for the wise council ;)
« Last Edit: November 07, 2009, 05:03:07 PM by greasy j »

Offline mystic_1

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Re: noob ?'s regarding compressor/ air tools
« Reply #13 on: November 07, 2009, 07:20:02 PM »
Apply a slight vacuum to the tank when you apply the epoxy.  That'll draw a bit of resin down into the hole itself.

Not too much though or you'll pull it straight through.

Apply two coats, second overlapping beyond the first.

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Offline mrbreeze

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Re: noob ?'s regarding compressor/ air tools
« Reply #14 on: November 07, 2009, 09:05:32 PM »
New tank sounds like the safe bet.
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Offline Don R

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Re: noob ?'s regarding compressor/ air tools
« Reply #15 on: November 08, 2009, 09:33:12 AM »
A co-worker bought an air compressor at a farm store, he put it under his workbench and boxed it in to save space. The tank ruptured and moved the bench and the garage wall off of the foundation. He returned to the store to find there was a re-call on those compressors but they had no way to find the people who purchased them.
The moral of the story is, be careful- I have welded on them too just be sure you are aware of the risks and take the appropriate precautions. Watch the pressure gauge and make sure to not over pressure that tank. The pressure switch could be malfunctioning or not connected correctly. There is an enormous amount of stored energy in compressed air.
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Offline mystic_1

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Re: noob ?'s regarding compressor/ air tools
« Reply #16 on: November 08, 2009, 09:37:16 AM »
<OT>

Say Don I dig your sig line, is that a quote from anyone?

</OT>

mystic_1
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Offline greasy j

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Re: noob ?'s regarding compressor/ air tools
« Reply #17 on: November 08, 2009, 09:54:57 AM »
A co-worker bought an air compressor at a farm store, he put it under his workbench and boxed it in to save space. The tank ruptured and moved the bench and the garage wall off of the foundation. He returned to the store to find there was a re-call on those compressors but they had no way to find the people who purchased them.
The moral of the story is, be careful- I have welded on them too just be sure you are aware of the risks and take the appropriate precautions. Watch the pressure gauge and make sure to not over pressure that tank. The pressure switch could be malfunctioning or not connected correctly. There is an enormous amount of stored energy in compressed air.

gotcha! I appreciate the warnings and the concern. it's good to be safe for sure.


it is working fine now, though!!!!!

the weld wasn't getting all the way into the very corner. no way we could make it work. tried about 8 times.

so here's what I did:

removed paint from the area, especially the corners, which were a pain. roughed everything up with sandpaper/file.

used JB stick weld over the welds. it is a playdough type of stuff that is fun to use and makes you feel like a kid again. no, I didn't eat any. ;) I completely covered the whole area and worked it into the nooks and crannys, being sure to push it deep into the corners.

I let that set up for 4 hrs. it said 60 mins. it feels like steel!

after that I used 2 packages of Devcon titanium 5 epoxy. it is the stuff that comes in the double syringe. less like playdough, more like giving your cat medicine. it is recommended for iron, so I went with it. plus it seemed to be the strongest. I completely slathered the whole area spreading it on kinda thick and making sure it was spread well in at the edges. let it set up for a bit and did another coat.

it said 4 hrs to use, but I waited about 16. started it up this morn. I RAN into the far side of the house and read my cycleworld that just came in the mail. before I had gotten past ads and contents, it stopped running. I investigated, hesitantly. no hissing. at all!!! it was right at 140 and holding steady. pulled the release valve and let it pressure up again... COOL! no probs.

the people I bought it from were super cool and would have refunded my money. but the PO had died, and it was the widow who I would have to get my $200 back from. :( I don't think I could've even if it hadn't worked. she needed the dough to stay afloat. I needed that sweet mac tools die grinder(1/4" indeed!).

all's well in the bay.

and hopefully the Sounders teach those stinkin Houston weenbags a stiff lesson in the playoff game today. then I'll be super happy!!!!!!

Offline greasy j

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Re: noob ?'s regarding compressor/ air tools
« Reply #18 on: November 09, 2009, 11:59:39 PM »
so what if I decide I want to replace the tank. how hard is it to change out? do I need anything special to do it? will home depot sell me one? not listed on their site. I found one online for a lot. the shipping would be ridiculous, too. would rather find something local.