jamesp
Cave Dweller
Member since October 2012
Posts: 36,175
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Post by jamesp on Jan 13, 2013 10:01:08 GMT -5
Are they AO or SiC?Industrial yards give used ones away.I just hammered one into powder easily-60 grit.Geoff's post got me to thinking about other sources of grit.The local industrial scrap yard has hundreds of pounds of them.I get one ocasionally to dress my rock saw blade.
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Post by deb193redux on Jan 13, 2013 10:29:12 GMT -5
most are ao. green ones are sic, buy only used in lapidary, so more scarce.
then there is the issue of grading. imo not viable competitor to buying clean well graded grits.
but, i like them for saw dressing. let me know if you want to trade a box of used/broken wheels for some rocks
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jamesp
Cave Dweller
Member since October 2012
Posts: 36,175
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Post by jamesp on Jan 13, 2013 11:44:08 GMT -5
Let me go to the industrial scrap yard and see what they got Daniel.Stuff comes and goes weekly.I will verify that they are cheap to get/in stock etcAre you looking for a flat rate and what size What rocks do you have? I sure learned a trick dressing.I take the cover off and drag the grinding wheel across the blade on all diamond surfaces while running.As if you were shaping the grinding wheel with the diamond segments.It is a lot more effective than just sawing thru.Let me know
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Geoff
spending too much on rocks
Please add 1074 to my post number.
Member since December 2012
Posts: 446
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Post by Geoff on Jan 13, 2013 13:18:51 GMT -5
Nice! I've been dragging my feet on getting a dressing stick, but I have a crappy grinder wheel. Never thought about using that to dress blades and core bits.
I sorted the stuff I brought home, ended up with a quarter cup of >100 grit, and a cup and a half of 60/90. The small stuff is running in a Lot-O, and the 60/90 is doing its best on a 3 pounder full of sapphire. I'll update my post with pics of the Lot-O batch today.
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jamesp
Cave Dweller
Member since October 2012
Posts: 36,175
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Post by jamesp on Jan 13, 2013 14:40:15 GMT -5
sappire?i got see those did you find those in Alaska?
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Post by deb193redux on Jan 13, 2013 16:07:55 GMT -5
I used to buy HarborFreight wheels before I found ACE FireBricks.
A flat rate with several wheels and pieces would be great. I could send smaller or larger rocks. Maybe some coconut agate. mostly jaspers. whatever fits in a MFRB.
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jamesp
Cave Dweller
Member since October 2012
Posts: 36,175
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Post by jamesp on Jan 13, 2013 21:06:50 GMT -5
Kool, PM the locale and i'll get to it.This place always has high quality stuff.Most of it from large industrial redo's by GE.
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Rockygibraltar
fully equipped rock polisher
Member since February 2006
Posts: 1,404
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Post by Rockygibraltar on Jan 15, 2013 2:05:10 GMT -5
Ive used old green sic wheels with good results. Rough grind only though. I didn't bother busting them up real fine, just into small chuncks.
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jamesp
Cave Dweller
Member since October 2012
Posts: 36,175
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Post by jamesp on Jan 15, 2013 10:07:30 GMT -5
Thanks for saying Joe.I was thinking rough grind only Thanks
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stillalive
starting to spend too much on rocks
Member since May 2011
Posts: 136
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Post by stillalive on Jan 15, 2013 10:14:14 GMT -5
I like this idea alot-buying any grit here in the uk (unless it's 50lb+) is very expensive,so any way of obtaining it cheaper has got to be good,thanks for sharing the idea.John.
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