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Old 11-17-2009, 05:51 PM
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what kind of sand to use to blast with

My son bought me a sandblaster from harbor freight a couole years ago and I never used it --it came with 4 nozzle sizes. I bought some blasting media at tractor supply (it was black) and apparently it is too coarse for this unit it keeps clogging even with no nozzle it gets clogged in the ball valve at the bottom of the tank (its not wet or damp,just some pieces are too big) I took one piece out of the nozzle that was like a sliver about 1/4" long but skinny like the end of a needle. Anyone know what kind of sand or whatever I can get that will work I went back to tractor supply and what I have is all they sell. Will playsand or something I can get like at a lowes work?

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Old 11-17-2009, 06:25 PM
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White silica sand. Available at any building supply. WEAR A MASK while using.
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Old 11-17-2009, 06:50 PM
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Hi,
Her's a media guide
Good luck,
Rich

http://www.guysonlib.co.uk/lib/blast...edia_guide.pdf
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Old 11-17-2009, 07:07 PM
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You should run it through a window screen to sift it first.
I blast on some tarps and then run the stuff through a screen to sift it and use it again. Also get a "deadman" valve and toss the ball valve.
I used play sand and a respirator the times I have done it. But the next time I will use a fresh air system and a different media (older and smarter )
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Old 11-17-2009, 09:20 PM
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I grew up in NW Michigan. 160 acres of playsand. None suitable for blasting. The granuals are so tumbled that they have no sharp edges. Simply break into powder when striking surface.. RATTSSSS!!
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Old 11-17-2009, 11:18 PM
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Look up blast media in the yellow pages..blast media is graded to size..I like vitro grit which is crushed glass and it cuuts real well so you do not use as much and it takes a lower pressure so it is not so likely to warp the metal..

Sam
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Old 11-25-2009, 01:17 PM
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my local home depot carries to grades of sand that is suitable for blasting. i use it with my harbor frieght blast-in-a-bucket setup. we even use the fine in our blast cabinet. i blast on a big blue tarp, collect my used sand and have a window screen to filter out the junk.
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Old 11-25-2009, 04:40 PM
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THANKS,GUYS
I got some 80 grit aluminum oxide and it seems to work pretty good,but to do it really good I think I might need a bigger compressor than I have,but can't buy one right now --you know the story NO $$$$$
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Old 11-25-2009, 08:24 PM
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Are you using a pressure blaster or the bucket one?
Pressure blasters use a lot less air because they are more efficient.
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Old 11-25-2009, 09:04 PM
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Its a pressure blaster,but I think my compressor is having a hard time keeping the pressure built up and blowing the air out thru the hose at the same time or maybe I'm not using it right???
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Old 11-26-2009, 05:52 AM
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I also have a H. F. unit (possibly the same unit), and I've noticed that you can't use too much pressure or it seems to "clog up". I also use the glass bead media, which works pretty good. Never have the problem as long as I keep the pressure under 45 psi. If the media seems to stop coming out, just hold your finger over the hole in the end of the gun, and blast a couple shots of air back through the media line, and that gets her running good again! Also make sure you have a in-line moisture remover. Sand, glass, or whatever will clog if there's moisture in the lines! Hope this helps...
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Old 11-26-2009, 08:29 AM
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I don't understand what U mean (maybe I'm dense) please explain
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Old 11-26-2009, 09:37 AM
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Fellows just a warning about "play sand" (silica sand), this stuff is deadly! Just because it's sold as play sand does not mean it is harmless because when used in a sandblaster it will release free silica and that junk can do you some serious harm in short order! A MASK is NOT good enough, if you use play sand you need a supplied air respirator or at least a cartridge filter respirator because in spite of what some may argue this stuff IS that bad! Don't let anyone tell you they use it all the time and it has not hurt them, if they have been breathing it then it has hurt them and they just don't know it yet. Just one session with inadequate protection can do serious harm but sometimes it takes years to have symptoms show up and even if you do use a good enough respirator there is still the collateral damage from drifting dust. Think about your family, your neighbors even your pets because breathing silica dust can be as dangerous as Asbestos dust and is almost like breathing ground up glass with every little bit you breath doing harm. The old argument about dust from sand occurring naturally don't mean a thing because even if some silica is present in natural dust it is not nearly as concentrated as in sand from a sandblaster nor is it broken up in a free form.


Think I am overdoing this? Not at all the stuff is that bad, just remember Silicosis only makes you miserable for a short time then it kills you!

Be safe, use a purpose type blasting media and NEVER use play sand (silica sand)!

Last edited by oldred; 11-26-2009 at 05:01 PM.
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Old 11-26-2009, 09:54 AM
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Hi,
Very good oldred, to many don't know about how dangerous the silica is, when I found out about it I stopped using it & now use mostly walnut shells.
Rich
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Old 11-27-2009, 12:12 AM
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Man, I'm glad old red is on these forums he should write a safety book for back yard fabricators. Thanks for another great tip.
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