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Post by oregon on Sept 2, 2016 14:50:03 GMT -5
I came by a few larger masonry blades that are too thick for a lapidary saw, and I don't know why they were at the building supply recycle place here so hard to resell. The blades look pretty straight, and the segments look plenty healthy. I was wondering what anyone thought about busting off (grinding/cutting) the segments and tossing them in the roughing stage for the tumbler. Would they destroy the rubber liners too quick, or just munch up the rock quicker than SiC?
Along a similar thought, does anyone make ceramic media with embedded diamonds? It'd be nice to not have to deal with SiC every few days if there were a diamond media that only wore down very slowly, but stayed intact and kept grinding rocks for days and days.
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Post by woodman on Sept 2, 2016 21:16:15 GMT -5
I came by a few larger masonry blades that are too thick for a lapidary saw, and I don't know why they were at the building supply recycle place here so hard to resell. The blades look pretty straight, and the segments look plenty healthy. I was wondering what anyone thought about busting off (grinding/cutting) the segments and tossing them in the roughing stage for the tumbler. Would they destroy the rubber liners too quick, or just munch up the rock quicker than SiC? Along a similar thought, does anyone make ceramic media with embedded diamonds? It'd be nice to not have to deal with SiC every few days if there were a diamond media that only wore down very slowly, but stayed intact and kept grinding rocks for days and days. I am using a 30 inch masonry blade now. works great. What do you call too thick?
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Post by oregon on Sept 3, 2016 0:59:51 GMT -5
these are only 14-16", but the kerf is probably > 1/8". Cleaning out rock saws is my LEAST favorite job, so thinner blade makes that not happen as frequently. Probably reasonable kerf for a larger blade. For a couple bucks I thought is might be a worthwhile experiment, and other masonry outfit might have lots of 'used blades' to unload. But I don't really want to trash a barrel in the process.
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Post by woodman on Sept 3, 2016 8:58:00 GMT -5
Thinner blades on small saws work real good but as you get bigger you need a thicker blade. a friend has a 48" saw and it has a 1/4" thick blade. You do get to clean out the mess more often. I think you are correct in thinking it may damage the barrel. I talked to a guy on here who made drag saw blades using diamond inserts from the blades. Where in Oregon do you get the blades? I live west of Portland headed to the coast.
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jamesp
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Post by jamesp on Sept 3, 2016 16:31:48 GMT -5
Don't waste your time. I put 3 pounds of these in a rotary barrel and they did very little cutting. About the size of half a domino. It requires pressure and speed for saw diamond segment 'teeth' to cut rock. They usually fuse diamond crystals and they are fairly round. If they would fuse crushed diamond crystals that were sharp you may have results. I bought them out of China for $70. They were diamond teeth for a 5 foot quarry blade.
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jamesp
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Post by jamesp on Sept 3, 2016 16:36:01 GMT -5
On the other hand, rubber diamond discs are packed with broken sharp diamonds and cut quickly with little pressure. Maybe the fastest lapidary cutter, and slow to wear.
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Post by oregon on Sept 3, 2016 18:16:57 GMT -5
Thanks, maybe that's the experiment I was remembering in the back of my mind but couldn't find by searching. I've been thinking about cutting up some of those pads. Vibes don't use much grit, just be nice to let the 1st stage tumble for a while and know that it's cutting the entire time....
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Deleted
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Post by Deleted on Sept 3, 2016 19:43:15 GMT -5
Don't waste your time. I put 3 pounds of these in a rotary barrel and they did very little cutting. About the size of half a domino. It requires pressure and speed for saw diamond segment 'teeth' to cut rock. They usually fuse diamond crystals and they are fairly round. If they would fuse crushed diamond crystals that were sharp you may have results. I bought them out of China for $70. They were diamond teeth for a 5 foot quarry blade. If you haven't already, consider trying them in the vibe. I have been visualizing mentally the action in the vibe as part of the design of my purple quartz vibe. The cutting action in the vibe is small but aggressive. Those segments may act both as filler (think ceramics) and mid grade grit. It won't assist in your 2 step process but other may benefit...
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jamesp
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Post by jamesp on Sept 3, 2016 20:08:28 GMT -5
Don't waste your time. I put 3 pounds of these in a rotary barrel and they did very little cutting. About the size of half a domino. It requires pressure and speed for saw diamond segment 'teeth' to cut rock. They usually fuse diamond crystals and they are fairly round. If they would fuse crushed diamond crystals that were sharp you may have results. I bought them out of China for $70. They were diamond teeth for a 5 foot quarry blade. If you haven't already, consider trying them in the vibe. I have been visualizing mentally the action in the vibe as part of the design of my purple quartz vibe. The cutting action in the vibe is small but aggressive. Those segments may act both as filler (think ceramics) and mid grade grit. It won't assist in your 2 step process but other may benefit... They may cut rock fast in the vibe. I would prefer the rubber pads cut into media sized pieces. The diamonds in those are sharp as razors.
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jamesp
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Post by jamesp on Sept 3, 2016 20:10:58 GMT -5
Thanks, maybe that's the experiment I was remembering in the back of my mind but couldn't find by searching. I've been thinking about cutting up some of those pads. Vibes don't use much grit, just be nice to let the 1st stage tumble for a while and know that it's cutting the entire time.... You could rub a piece of agate against one of the segments and find out what the cutting action is like. I think you will not be impressed. The rubber pads cut with little pressure, those things are evil.
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Post by woodman on Sept 5, 2016 12:06:56 GMT -5
Don't waste your time. I put 3 pounds of these in a rotary barrel and they did very little cutting. About the size of half a domino. It requires pressure and speed for saw diamond segment 'teeth' to cut rock. They usually fuse diamond crystals and they are fairly round. If they would fuse crushed diamond crystals that were sharp you may have results. I bought them out of China for $70. They were diamond teeth for a 5 foot quarry blade. Do you want to sell them?
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jamesp
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Post by jamesp on Sept 5, 2016 12:51:30 GMT -5
Don't waste your time. I put 3 pounds of these in a rotary barrel and they did very little cutting. About the size of half a domino. It requires pressure and speed for saw diamond segment 'teeth' to cut rock. They usually fuse diamond crystals and they are fairly round. If they would fuse crushed diamond crystals that were sharp you may have results. I bought them out of China for $70. They were diamond teeth for a 5 foot quarry blade. Do you want to sell them? I think so. Sure. Why not. Let me locate them first, never know where stuff goes around here. Talk money on PM ? Look at Aliexpress and make sure you don't find a more optimum size. They got tumbled but seem to have no effect. Could fit in SFRB. They came in a heavy box about the size of 2/3 brick, dense suckers. Share your plan ?
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Post by woodman on Sept 5, 2016 21:02:50 GMT -5
I think so. Sure. Why not. Let me locate them first, never know where stuff goes around here. Talk money on PM ? Look at Aliexpress and make sure you don't find a more optimum size. They got tumbled but seem to have no effect. Could fit in SFRB. They came in a heavy box about the size of 2/3 brick, dense suckers. Share your plan ? I run a drag saw and if they are the same thickness more or less the length would not matter. the segments I buy are two inches long. what are the dimensions of what you have? what I have been using 4.15 MM thick, 10.4 mm high and 50.7 mm long.
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jamesp
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Post by jamesp on Sept 6, 2016 5:24:05 GMT -5
I am glad you asked. I will check, but the kerf width is either 8 or 10mm. I believe 10mm. I would say the length is 25mm and the height is 18 mm. These were made for a large quarry blade 5-6 feet in diameter. Probably for sawing mass granite where a 10mm kerf was not a problem. Guessing a thick high speed blade with a bunch of horsepower and down force behind it.
They may be too thick for a drag saw ??
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NDK
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Post by NDK on Sept 6, 2016 13:01:16 GMT -5
James, could those segments be welded to a cup for a sphere machine?
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jamesp
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Post by jamesp on Sept 6, 2016 16:56:35 GMT -5
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Post by Deleted on Sept 6, 2016 16:58:08 GMT -5
Yes, they mig weld just fine.
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jamesp
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Post by jamesp on Sept 6, 2016 17:02:18 GMT -5
Yes, they mig weld just fine. But do they cut on a slow moving spree machine Scott ?
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Post by Deleted on Sept 6, 2016 17:37:20 GMT -5
Mine were too wide, so not enough pressure to cut really well.
Plus, the grit needs to be very aggressive for slow machines. Only the coarsest grits need apply.
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jamesp
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Post by jamesp on Sept 6, 2016 22:34:39 GMT -5
Mine were too wide, so not enough pressure to cut really well. Plus, the grit needs to be very aggressive for slow machines. Only the coarsest grits need apply. I bought a little batch of those yellow synthetic. They are crystals but they are about round, soft octahedral in appearance. 25 grit in size. Seems like cracked pieces would be nasty cutters as opposed to the whole crystals.
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