RE: Media blaster troubleshooting

[David Bailey <bb64d440@xxxxxxxxxxx>]

I view media blasting as similar to prepping for paint, because, most often, you are. Just as there are different types and grit sandpapers, there are, as you know, different grit media but it seems as though some folks might not be aware of the different types of materials the blast media is made from and the advantages of one type media over another that is available for their use. Some of the different medias most commonly used is glass bead, ground glass, aluminum oxide, and silicon carbide among others. The aluminum oxide is a good choice; it is a rather aggressive “sharp” hard substance that should last through many uses but is a little pricier than glass bead. The silicon carbide is harder still and very pricey. 
A shop in business might have several blast cabinets each loaded with a different material, but for me personally with just one, I’d rather have my cabinet filled with a good general all around material useable for most of the type of work I do so I like a mixture of both (30%) coarse and (70%) medium glass bead. Glass bead is fairly hard, lasts for some time and is somewhat less aggressive because it is more “rounded” in shape than “sharp” and costs less.  Works great for me. 
 
Dave B.

 
> To: 1962to1965mopars@xxxxxxxxxx
> From: waedison@xxxxxxxxxxx
> Subject: Re: Media blaster troubleshooting
> Date: Mon, 19 Jul 2010 16:11:12 +0000
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> Wow, thanks Dave. I can see 2-3 things right away to check. First, my air pressure is at 120 psi. You and others have talked about the depth of the pickup tube in the media, so will try different things with that as well. I was using #70 grit aluminum oxide for general cleaning. Is that a good choice? 
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> No one has talked about the gun itself. Are there differences between brands. The reason I ask is that the Northern Tool cabinet came with a gun that only cleaned a circle of about 1/2",  I took the gun off my cheap Sears outdoor blaster and put it on. For awhile, probably 20 hours, it worked GREAT, cleaned about a 2" circle. It has a ceramic tip, but I don't know if it's worn out or not.  The NT gun was just pot metal, no ceramic tips. Any advice on the gun itself would be appreciated. 
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> Thank you to all who are contributing. It's very much appreciated. /Butch/Ferndale, WA 
> 
 		 	   		  
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