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Post by Jugglerguy on Jul 26, 2017 16:31:05 GMT -5
I was just out selling some polished Petoskey stones to a local gift shop. The owner told me that he's gotten a lot of requests for Petoskey stone eggs lately. I told him that I didn't have the equipment for that, which got me wondering again how eggs are made. I found the following video. I'm pretty sure this machine is not readily available for purchase. jamesp, you just made something for @shotgunner the other day. Would you mind whipping up one of these for me in your spare time? Does anyone know anyone who makes eggs or are all of these made in foreign countries and imported?
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Post by Jugglerguy on Jul 26, 2017 17:01:10 GMT -5
The video don't play Walt Click the button that says "Watch this video on YouTube".
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Post by manofglass on Jul 26, 2017 17:08:50 GMT -5
I found it thanks
Walt
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Deleted
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Post by Deleted on Jul 26, 2017 19:26:37 GMT -5
Rob, it's a wood lathe for roughing in and a wood lathe chuck on a shaft at much higher RPM for finish. You could make that happen....
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Post by Rockoonz on Jul 26, 2017 20:55:01 GMT -5
Actually it's a metal lathe, but if I were making one I would probably use a wood lathe and build a crude follower to guide a tool post grinder. Looks like they were cutting striped calcite "onyx", the carbide lathe bits would not cut anything harder. Interesting how no one has a mask on, and about halfway through you hear the chronic coughing in the background.
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Post by Deleted on Jul 26, 2017 21:40:20 GMT -5
JugglerguyA four jaw chuck on eBay for $80 shipped. A shaft threaded to accept it. A frame and bearing to accept the shaft. Protect the bearings from water with shielding. Motor and stepped pulleys to drive the work. Fashion a rest to support the cutting tools. Use your wet grinder to shape and wet dry paper to prepolish. Then a leather patch coated in polish to finish. Start with making eggs. Soon, goblets of agate are your Christmas gifts.
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minerken
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Post by minerken on Jul 27, 2017 11:11:58 GMT -5
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Post by Deleted on Jul 27, 2017 20:39:36 GMT -5
I'm thinking a cheap chuck and backer threaded onto a shaft. Pillow blocks to stabilise, step pulleys to control speed. Set it waist high. Sit on a bucket to use itETA For $115 including speed control and 1/2hp motor I ain't building shit. Wow ETA*2 Needs a 1"-8 threaded 4 jaw chuck. Grizzly has one for $45 shipped. Rob, for $160 you can be making eggs
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Post by Jugglerguy on Jul 27, 2017 22:06:47 GMT -5
I'm thinking a cheap chuck and backer threaded onto a shaft. Pillow blocks to stabilise, step pulleys to control speed. Set it waist high. Sit on a bucket to use itETA For $115 including speed control and 1/2hp motor I ain't building shit. Wow ETA*2 Needs a 1"-8 threaded 4 jaw chuck. Grizzly has one for $45 shipped. Rob, for $160 you can be making eggs I wasn't really serious about making eggs. If I was going to make eggs, I'd still have some questions. One question I have is what would I use as a cutting tool? Would I start with a rectangular block? When it's spinning and I stick a file or something on it, wouldn't the corners break off rather than grind down gradually? Would this only work with soft rock like in the video? I'm not going to try to make eggs, but I think it's fun to think about. I just got started making bowls, I can't start something new before I old stuff!
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Post by Deleted on Jul 27, 2017 22:30:57 GMT -5
JugglerguyRob, I am seriously considering this. Because what I really want is to make glasses and goblets. I'll use a wet angle grinder to smooth out a rectangular block. A foredom or some other such to bore the bowl of the goblet. And perhaps to shape the stem and base. Then wet dry sand paper to finish the piece and finally a piece of leather in polish slurry to bring the shine. Finally, I haven't sorted out the parting of the piece from the blocked base into he vice. Maybe a diamond segment welded to a stick? Or a porcelain drill bit slowly worked into stone. I think the last is best. ETA Or a saw blade hand held.... Still spitballing
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Post by captbob on Jul 27, 2017 23:10:25 GMT -5
I'm not going to try to make eggs, but I think it's fun to think about. I just got started making bowls, I can't start something new before I old stuff! Silly silly man. You aren't making bowls... you are making NESTS! what goes in a nest? just sayin'
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Post by Deleted on Jul 27, 2017 23:48:36 GMT -5
Well done Bob.
Seriously, well done.
💪😎
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Post by fantastic5 on Jul 28, 2017 6:38:33 GMT -5
Would this only work with soft rock like in the video? Petoskeys are soft...just saying.
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Post by Jugglerguy on Jul 28, 2017 7:02:01 GMT -5
Would this only work with soft rock like in the video? Petoskeys are soft...just saying. They're also usually too small.
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Post by Deleted on Jul 28, 2017 9:14:19 GMT -5
Would this only work with soft rock like in the video? Petoskeys are soft...just saying. I think carbonates will cut easiest and fastest. I do believe agate can be cut this way. I once saw an amazing display made by a gentleman that cut huge glasses from pure quartz crystals. They looked commercially made. Perfect clarity. Too perfect actually. Harder material will require more care in the rough cutting.
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minerken
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Post by minerken on Jul 28, 2017 9:48:20 GMT -5
there are many types of cutting tools for lathes that would probably work high speed steel bits would probably work on softer material like the limestone stuff ie travertine etc.. One may wind up doing a lot of sharpening but you can buy HSS blanks pretty cheap and make your own cutting tools. You could also try indexable carbide insert cutters that would be able to take you into the jasper and possibly agate materials www.ebay.com/sch/i.html?_nkw=carbide+wood+lathe+tools . Be forewarned you can buy woodworking lathes and even metal lathes relatively cheap but watch out tooling up can be the expensive part.
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Post by Deleted on Jul 28, 2017 9:57:56 GMT -5
minerkenI was planning to use a foredom and diamond bits for boring and forming. Wet dry sand paper thru the grits and polish slurry on a leather pad. I.may actually do this. But after I get my workshed done
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minerken
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Post by minerken on Jul 28, 2017 10:15:33 GMT -5
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Post by Rockoonz on Jul 28, 2017 10:58:49 GMT -5
sphereguy was telling me he has a line on a lathe-like machine that makes sphere blanks using saw blades kind of like the tool post grinder setup I mentioned, fairly easy to build in a well equipped shop. The real trick is dealing with the dust or concrete like residue from removing so much material. Might be good to think inside the box, ie contain the waste.
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