jamesp
Cave Dweller
Member since October 2012
Posts: 36,564
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Post by jamesp on Feb 11, 2013 10:46:24 GMT -5
Sixty pounds of 36 and 60 for $20.Then labor to crush.Looks like AO.Might have cheated and laced quartz in there.Am interested in tumbling with the marble size chunks too.Not just the powder.They are from Mad Max Industrial junkyard;the brand is Norton,weigh 4 pounds each,and are 8 inch wheels. Attachments:
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Post by deb193redux on Feb 11, 2013 10:53:54 GMT -5
AO will still break down quicker the SiC. The larger pieces will be similar to media with embedded abrasive. They should last a bit longer.
Also AO is not as hard as SiC, so there should be less shaping of the rock. You will need to compare cost (I assume modest) and labor (??) with the cost of AO grit, or media with AO.
It would have been best if they had had some Sic wheels
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jamesp
Cave Dweller
Member since October 2012
Posts: 36,564
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Post by jamesp on Feb 11, 2013 13:13:36 GMT -5
I hear you Daniel.I have a bucket of 120 AO i grind with and it cuts a lot more than i thought.Can you use Ao to dress saw blades?
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Post by deb193redux on Feb 11, 2013 15:07:29 GMT -5
I think AO dresses blades better then SiC. The point is to use something a bit softer than SiO2/Agate. That is why obsidian is often recommended.
Before I started buying fire bricks, I would buy a 8" AO grinding wheel from Ace Hardware and break it in half and then use it instead of more expensive dressing blocks/sticks.
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Post by johnjsgems on Feb 11, 2013 20:32:23 GMT -5
The sticks and blocks BD sells are 60 grit aluminum oxide. They work great.
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Post by deb193redux on Feb 11, 2013 20:52:55 GMT -5
yes I assume they do - but per cubic inch they cost a lot more than hardware store AO grinding wheels. and with the local hardware store there is no shipping
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