daddydave
starting to shine!
Member since June 2007
Posts: 44
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Post by daddydave on Jan 20, 2008 16:51:26 GMT -5
I'm looking to find an inexpensive way to 'rough grind' agate. My 100 grit wheel is too slow. Playing with the idea of coating a worn out band for my 6" expando wheel with epoxy paint (thinly) and then rolling it in diamond grit (probably around 80). Would appreciate any comments or ideas. Perhaps anyone that has tried this method. Have lots of agate that is too rough for tumbling yet still would be fine if having the rough low spots 'ground out' prior to an extended period on the rotary. This Tennessee Paint Rock is getting scarcer and scarcer. Thanks, dave t.
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Post by docone31 on Jan 20, 2008 21:51:28 GMT -5
Get a regular grinding wheel. Dop the stone and use an hand sprayer to spray water on both the stone and the wheel. If it gets too hot, the wax will slip. Just pull the stone away from the wheel and let both the wax and the stone cool off. I dip them into a cup of water. I am not sure using epoxy and grit will be the answer. Epoxy drags. I suspect also, it will shed grit amazingly fast. The phenolic wheels are "vulcanized" with impregnated grit. Try the regular grinding wheel. Then use the 100, 220, etc., to clean up the grinding marks. It will chip so go slowly, and lightly. It is faster though.
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Post by Jack ( Yorkshire) on Jan 22, 2008 4:00:32 GMT -5
Hi Agood tip from Doc above I also use this method works well
Jack yorkshire UK
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daddydave
starting to shine!
Member since June 2007
Posts: 44
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Post by daddydave on Jan 22, 2008 13:20:21 GMT -5
Thanks guys, will try a SC stone on my small 6" grinder with a water spray to check it out. From there I can go to a larger 8" stone on my larger grinder. Sure would be a lot cheaper than diamond grit as well as using up my diamond wheels for finishing just to get a 'rough-in'.
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