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Post by orrum on Dec 26, 2014 19:31:46 GMT -5
That would probably tear up some stuff. Lotta vibe with no cushion?
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jamesp
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Post by jamesp on Dec 26, 2014 19:56:34 GMT -5
That would probably tear up some stuff. Lotta vibe with no cushion? Oh indeed orrum. That is just the vibe generator sitting loose. I measured the spring constant and ordered 4 accordingly. Try buying specific springs some time. They are proud of those suckas. That will be mounted below on a plate, hopper on top, and whole assembly sitting on 4 springs. I got to do it right if tumbling 'orrum's green rhyolite'
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Post by orrum on Dec 26, 2014 21:26:11 GMT -5
Hey James I think it will work! Hey I copied your PVC rotary tumblers snd they work great!
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jamesp
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Post by jamesp on Dec 26, 2014 22:10:31 GMT -5
Hey James I think it will work! Hey I copied your PVC rotary tumblers snd they work great! I copied them from another guy orrum LOL
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Post by Starguy on Dec 27, 2014 23:50:23 GMT -5
Great polish on the rhyolite jamesp. I've had problems polishing the montana variety. Yours look great!
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jamesp
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Post by jamesp on Dec 28, 2014 6:14:39 GMT -5
Great polish on the rhyolite jamesp. I've had problems polishing the montana variety. Yours look great! The heat treatment softened it Brent making polish more difficult. Will rerun with softer polish as an experiment. Was looking for 500 and 1000 garnet abrasive, no can find. In the old days we had garnet mines all over Georgia. Using them to make garnet(sand) paper. Replaced by aluminum oxide. Nasty iron garnets, nothing like those jewels you find. UGLY garnets, but full of good abrasive particles. The only star these would have would be a rust pattern LOL
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Fossilman
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Post by Fossilman on Dec 28, 2014 10:47:14 GMT -5
Beautiful tumbles James.....................PS: at least your were dressed-LMAO..... and that tells me you have welded in the buff Michael LOL Fried bacon.....ROTFLMAO..............Welded wearing sandals,never again!!!!!!!!
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jamesp
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Post by jamesp on Dec 28, 2014 11:33:51 GMT -5
and that tells me you have welded in the buff Michael LOL Fried bacon.....ROTFLMAO..............Welded wearing sandals,never again!!!!!!!! Had the melt balls land in the hole where the collar bone is, smells just like beef up there. huuuurts
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Deleted
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Post by Deleted on Dec 28, 2014 13:02:05 GMT -5
Whatcha using for a hopper?
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jamesp
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Post by jamesp on Dec 28, 2014 15:10:02 GMT -5
Whatcha using for a hopper? I was getting ready to go make another pass in the bone yard Scott. I think it is going to be a 6 inch OD pipe with a 1/8 inch wall about 10 inches long. I had thought up a design that was a bit of a skeleton looking arrangement using the hopper for the strength. i.e. simple and light as possible. Must be able to move the vibe generator fore and aft to dial in the motion. The closer the shaft is to the pipe the gentler the action(I think). it has been a 8 pass parts selection(8 passes, one per day, on the ATV, shopping for the right components). 8 suggests more complicated project.
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Post by Starguy on Dec 28, 2014 17:14:50 GMT -5
Great polish on the rhyolite jamesp. I've had problems polishing the montana variety. Yours look great! The heat treatment softened it Brent making polish more difficult. Will rerun with softer polish as an experiment. Was looking for 500 and 1000 garnet abrasive, no can find. In the old days we had garnet mines all over Georgia. Using them to make garnet(sand) paper. Replaced by aluminum oxide. Nasty iron garnets, nothing like those jewels you find. UGLY garnets, but full of good abrasive particles. The only star these would have would be a rust pattern LOL jamespI've got a source for garnet abrasive. It would probably be considered about 20 grit. It's durable but not hard so it makes a pretty good fine grit to pre-polish. I'll try to collect a bag or two next summer when the snow goes away. It has a lot of silica sand with it but that disappears after a week or two of tumbling. It puts a pretty good smooth finish on agate. You still need to polish though. Grinding in garnet sand is kind of fun. You can't replace SiC coarse but it leaves a nice silky finish for the polish stage. Very reuseable too because it's durable. Later Brent
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jamesp
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Post by jamesp on Dec 28, 2014 17:19:07 GMT -5
The heat treatment softened it Brent making polish more difficult. Will rerun with softer polish as an experiment. Was looking for 500 and 1000 garnet abrasive, no can find. In the old days we had garnet mines all over Georgia. Using them to make garnet(sand) paper. Replaced by aluminum oxide. Nasty iron garnets, nothing like those jewels you find. UGLY garnets, but full of good abrasive particles. The only star these would have would be a rust pattern LOL jamespI've got a source for garnet abrasive. It would probably be considered about 20 grit. It's durable but not hard so it makes a pretty good fine grit to pre-polish. I'll try to collect a bag or two next summer when the snow goes away. It has a lot of silica sand with it but that disappears after a week or two of tumbling. It puts a pretty good smooth finish on agate. You still need to polish though. Grinding in garnet sand is kind of fun. You can't replace SiC coarse but it leaves a nice silky finish for the polish stage. Very reuseable too because it's durable. Later Brent
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jamesp
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Post by jamesp on Dec 28, 2014 17:25:39 GMT -5
jamespI've got a source for garnet abrasive. It would probably be considered about 20 grit. It's durable but not hard so it makes a pretty good fine grit to pre-polish. I'll try to collect a bag or two next summer when the snow goes away. It has a lot of silica sand with it but that disappears after a week or two of tumbling. It puts a pretty good smooth finish on agate. You still need to polish though. Grinding in garnet sand is kind of fun. You can't replace SiC coarse but it leaves a nice silky finish for the polish stage. Very reuseable too because it's durable. Later Brent I was looking for 500 and 1000 in garnet Brent. Fine grits for polishing soft stones. The sand blasting companies sell coarse grit garnet and it is popular for the reason you mention-durability. It would be a special project, but they used to make tons of fine grits out of garnet for garnet paper. But no more. Thanks for the kind offer. Wish I could get in your garnet creeks.
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Post by Starguy on Dec 28, 2014 17:36:56 GMT -5
jamespI've been surprised by the finish grinding in garnet sand. It acts like a much finer grit than the size of the crystals would lead you to believe. The crystals get kind of rounded so they're no good for stock removal, but they put a pretty nice smooth fine grind on stones. Hardnes is only MOHs 7-7.5. It's a much gentler grind than SiC.. You need to tumble a little longer than with silicon carbide but not much. Tumbling in durable sand is kind of fun. In addition you get some very pure garnet grit after a week or two. We have some baseball sized iron garnet here. Later Brent
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jamesp
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Post by jamesp on Dec 28, 2014 18:59:23 GMT -5
jamespI've been surprised by the finish grinding in garnet sand. It acts like a much finer grit than the size of the crystals would lead you to believe. The crystals get kind of rounded so they're no good for stock removal, but they put a pretty nice smooth fine grind on stones. Hardnes is only MOHs 7-7.5. It's a much gentler grind than SiC.. You need to tumble a little longer than with silicon carbide but not much. Tumbling in durable sand is kind of fun. In addition you get some very pure garnet grit after a week or two. We have some baseball sized iron garnet here. Later Brent A man in montana was tumbling Montana agate chips for decorative terrazzo mix and he was using found garnets. His tumble had a 450 pound capacity. The Mohs scale is not a good indicator of all properties of a rock. Garnet is known for it's toughness. I figured you had big garnets if you have such large facet graders.
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Post by pghram on Dec 28, 2014 23:53:02 GMT -5
Have you ever tumbled them to see what's under the rust?
Rich
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