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Post by Garage Rocker on Feb 8, 2017 17:10:17 GMT -5
Been a productive day. Still daylight, what's next?
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jamesp
Cave Dweller
Member since October 2012
Posts: 36,555
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Post by jamesp on Feb 8, 2017 17:13:32 GMT -5
Been a productive day. Still daylight, what's next? Futon and 3 big hounds. Grab the 'clicka' as my northern friend calls the TV changer. Crash time.
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Post by spiceman on Feb 8, 2017 17:54:43 GMT -5
Question: I don't know, do the pads float? Or with a slurry will they stay up top?
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Wooferhound
Cave Dweller
Lortone QT66 and 3A
Member since December 2016
Posts: 1,432
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Post by Wooferhound on Feb 8, 2017 18:11:30 GMT -5
5 minute epoxy is not waterproof Need to use the 24 hour cure stuff
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Post by spiceman on Feb 8, 2017 18:15:13 GMT -5
Not all expoxy is water proof even the 24hour cure but Devcon ... Don't know.
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jamesp
Cave Dweller
Member since October 2012
Posts: 36,555
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Post by jamesp on Feb 8, 2017 23:00:15 GMT -5
Not all expoxy is water proof even the 24hour cure but Devcon ... Don't know. 5 minute epoxy is not waterproof Need to use the 24 hour cure stuff Thanks for the heads up. If they come apart there will be 60 pieces instead of 30. Double the grinding surface.
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Post by captbob on Feb 8, 2017 23:35:51 GMT -5
How big is the tumbler you are doing this in?
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jamesp
Cave Dweller
Member since October 2012
Posts: 36,555
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Post by jamesp on Feb 9, 2017 6:57:23 GMT -5
How big is the tumbler you are doing this in? It holds 6 pounds at 60% and 8 pounds at 80%. 6" PVC and about 9 inches long (inside dimensions) plus the 6" to 4" reducer. About 250 cubic inches. The stack of pads was 4" dia and 2" tall = 25 cubic inches. Tumbler is filled 10% with pads. 70% rock fill, 7 pounds. It won't take long to find out if it is a waste of time. After the initial charge of SiC 30 I will stop adding SiC 30. The diamond pads will be left to do the cutting by themselves. Those white coral medias have been running 55 RPM for 12 days with a 1 pound rock and a bunch of 1-2 inch rocks. Five SiC 30 grit adds w/clay at 55 RPM. They were hammer broken coral slabs from 3/16" to 3/8" thick. They are to replace shrinking quartz pea gravel vibe media.
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jamesp
Cave Dweller
Member since October 2012
Posts: 36,555
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Post by jamesp on Feb 9, 2017 7:17:04 GMT -5
4" pads. But 10mm thick. More expensive but no glue required since they can be cut up into nice size chunks. $6 each in QTY is cheapest so far. Coarsest grit found so far is 16 grit. Just remove backing and grind backing side off completely to expose diamonds.
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jamesp
Cave Dweller
Member since October 2012
Posts: 36,555
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Post by jamesp on Feb 9, 2017 7:29:33 GMT -5
Question: I don't know, do the pads float? Or with a slurry will they stay up top? They sink like a rock spice. Not as heavy as a rock but still heavy due to the diamonds. Not a floater at all. Should circulate well. No matter. The sticky clay does not let anything float as the contents of the tumbler are all stuck together.
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jamesp
Cave Dweller
Member since October 2012
Posts: 36,555
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Post by jamesp on Feb 9, 2017 13:02:17 GMT -5
30 grit pads after a night with fresh SiC 30(left), 100 grit pads after a day with fresh SiC 30 grit(right) Guess what, the 100 grit diamonds are sharper and scratch glass deeply with less pressure than the 30 grit. Enigma. The 100 grit diamonds look harmless in the photo, but not in a low pressure test on glass. sharpness is likely the more important factor. This rock after 18 hours with 30 grit pads and SiC 30. Pads probably had little effect since they had few exposed diamonds until SiC exposed their diamonds. Let's see what 2-3 more days does.
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Post by tims on Feb 9, 2017 13:30:07 GMT -5
What would happen if you dipped the pads in liquid nitrogen and smacked em? Surely you have a couple bottles sitting around ...
Seriously though i wonder if those pads would shatter if frozen hard enough.
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jamesp
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Member since October 2012
Posts: 36,555
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Post by jamesp on Feb 9, 2017 14:18:12 GMT -5
What would happen if you dipped the pads in liquid nitrogen and smacked em? Surely you have a couple bottles sitting around ... Seriously though i wonder if those pads would shatter if frozen hard enough. Ha, excellent approach Tim. Let's see if they grind rocks. If it is a better alternative then a whole smorgasbord of issues arise. Like size of chunks vs whole pads vs tiny pieces. I just threw a whole pad in the barrel to see if the tumbler will remove the velcro. And a pad cut into 210 little chunks. Another alternative is using them in a vibe since the grit is probably not going to break down. Will have to put a protective bag in the vibe to protect the hopper. Something tells me the higher forces in a vibe is going to eat rocks like crazy. Vibes break coarse grits easy, probably not diamond.
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jamesp
Cave Dweller
Member since October 2012
Posts: 36,555
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Post by jamesp on Feb 9, 2017 15:08:30 GMT -5
Unloaded the barrel twice today. Handful by handful. Pads were equally distributed left to right. Was concerned about them all piling up to one side of the barrel.
So far, everything looks perfect. Question is, will they cut ?
And if more pads are required, will they wear each other out ?
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Post by wigglinrocks on Feb 9, 2017 17:41:44 GMT -5
You're going to be bald by the time this experiment is done , sounds like a lot of head scratching going on . Hope the pads don't have a negative effect on the barrels
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jamesp
Cave Dweller
Member since October 2012
Posts: 36,555
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Post by jamesp on Feb 9, 2017 17:59:24 GMT -5
You're going to be bald by the time this experiment is done , sounds like a lot of head scratching going on . Hope the pads don't have a negative effect on the barrels No biggy. Easy access to check everything. They are on the ATV route. in some case barrel wear is part of the game if you want fast wear. Broken up SIC 60 grinding wheels eat barrels fast. Rocks too. Makes you wonder if a barrel is good for X pounds of rock. whether you grind them slow or fast. Last time I ordered bulk materials for 6 inch PVC barrels. I consider them expendables.
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Post by wigglinrocks on Feb 9, 2017 18:27:20 GMT -5
Good point , if it saves countless pounds of grit , and who knows how many weeks of clean outs and power usage , it would be a fair tradeoff . I would imagine if the diamonds stay sharp , even in the rubber barrels there would be some wear . Doubt it would be as bad as pvc but wear nonetheless .
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jamesp
Cave Dweller
Member since October 2012
Posts: 36,555
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Post by jamesp on Feb 9, 2017 18:45:10 GMT -5
Good point , if it saves countless pounds of grit , and who knows how many weeks of clean outs and power usage , it would be a fair tradeoff . I would imagine if the diamonds stay sharp , even in the rubber barrels there would be some wear . Doubt it would be as bad as pvc but wear nonetheless . When sandblasting words/images on monuments they use a rubber. Rubber is about the best for resisting hard abrasives. I don't think you can wear out the rubber Lortone barrel that I owned. Guessing other brand tumblers use rubber. PVC not near as resistant.
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Post by wigglinrocks on Feb 9, 2017 18:57:50 GMT -5
Good point , if it saves countless pounds of grit , and who knows how many weeks of clean outs and power usage , it would be a fair tradeoff . I would imagine if the diamonds stay sharp , even in the rubber barrels there would be some wear . Doubt it would be as bad as pvc but wear nonetheless . When sandblasting words/images on monuments they use a rubber. Rubber is about the best for resisting hard abrasives. I don't think you can wear out the rubber Lortone barrel that I owned. Guessing other brand tumblers use rubber. PVC not near as resistant. That's true , my GF was doing glass etching for awhile and used thin rubber sheets for a stencil . So why does the lid liner seem to get thinner over time ? Thin rubber against metal ?
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Post by spiceman on Feb 9, 2017 21:28:41 GMT -5
Base on that last statement about sticking in the clay. It might be better to use the first type pad and cut each little square off. Lots of work but diamonds are forever...but not the rubber. I do like the idea but lots of variables. Testing....
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