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What size sand for sandblaster?

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Nathan(GA)

07-31-2000 10:45:56

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I bought one of those pressurized pot sandblasters from Harbor Freight last year and just now getting around to using it. What size sand works the best? I have one of those suction type guns that you stick in a bucket. I have to use fine grade with it. I just wanted to know before I got started with the wrong size. Town is 20 miles away. Thanks, Nathan

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DC Dale

07-31-2000 21:40:48

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Re: What size sand for sandblaster? in reply to Nathan(GA), 07-31-2000 10:45:56

I use # 30 silica sand. It is also called industrial sand,and is made in a crusher to produce sharp edges and requires a mask to avoid inhaling Silica dust. Play sand has rounded edges and isn't as efficient as a blast media. It is also available in # 60 grit for delicate work.

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Jim in N M

07-31-2000 16:09:46

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Re: What size sand for sandblaster? in reply to Nathan(GA), 07-31-2000 10:45:56

I found the best sand to use is kids play sand---buy it at any home Depot type store, and if you put down a big tarp you can re-use it.

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Leon

08-02-2000 10:45:34

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Re: Re: What size sand for sandblaster? in reply to Jim in N M , 07-31-2000 16:09:46

Its funny- when I asked for sandblasting sand at my local lumber yard, they happily sold me white play sand that has printed clearly on it "DO NOT USE FOR SANDBLASTING". So, of course, I did just that and it worked fine. I'm sure this is lawyerspeak and meant to save the maker from lawsuits, and little bearing in reality. They shoudl just say "use a respirator".

After a silly number of phone calls, I finally found an industrial supplier that will sell me "black beauty" slag media- and this stuff really cuts! I think it is leftover from steel refining. $6.50/100 lb bag.

Regarding grit size, the limiting factor for me is that the larger grits seem easier to clog than the finer. I went with the mid grade black beauty and no clogs.

I also suggest buying a carbide tip from TIP. They outlast ceramic 100 to 1. Cost is about $35. I have a blaster like yours, I think, and it uses the same size tip as the TIP "38 special" blast gun.

One more thing- I was using too much air pressure (130psi) and I think that contributed to absurdly fast wearing out of my ceramic tips. Run at about 90psi.

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Nathan(GA)

08-02-2000 13:24:16

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Re: Re: Re: What size sand for sandblaster? in reply to Leon, 08-02-2000 10:45:34

Thanks guys. Leon, I had a problem with clogging too with the med. grade sand in the suction type. So I wanted to be better prepared when it comes time to use the pot type. I haven't taken it out of the box yet, but I need to get busy. I have about 4 or 5 items that need blasting. I was thinking about making some type of 3 sided plywood box about 4x8 to catch some of the mess, but was wondering about air circulation. I like to blast when the wind is blowing enough to carry most of the dust away from the house and me.

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MikeH-Tx

08-03-2000 10:31:35

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Re: Re: Re: Re: What size sand for sandblaster? in reply to Nathan(GA), 08-02-2000 13:24:16

Nathan, whatever sand you use, be sure to run it through a screen first. Specially play sand, isn't all the same size. That is probably why your suction rig kept jamming.

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