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Post by Deleted on Dec 4, 2014 22:08:52 GMT -5
Thanks Rick! I have no doubt, diamond segments and "sintered" wheels are the same. The difference may be the matrix. It does wear away, VERY SLOWLY. So slowly it makes me wonder about the concerns around cleavage. Perhaps enough crystals are aligned in such a manner that cleavage is only an issue with a small percentage and the others make up for the loss?? Perhaps those segments and sinters are polycrystalline diamond? Knowledge is power. Perhaps jamesp will expound on the durability of segments I describe. He has a segmented grinder wheel that has cut many kilograms of super tough coral, DRY, and still does the job admirably. Jim?
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jamesp
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Post by jamesp on Dec 4, 2014 23:36:08 GMT -5
gemfeller@shotgunnerThis 4 inch diamond cup is worn 4mm into the solid sintering. Spinning at 3600 RPM, grinding agate, dry, heavy pressure. For heavy rounding of at least 200 pounds of pre-tumbles. Diamonds almost invisible at start. But after matrix wears, it continues to look like this. Looks like the matrix trails give backing to the diamonds. Said 30 grit, looks coarser. No doubt that the sintering is very hard. Or the diamonds are durable. I would say both. It is a superb cutting tool. the newer ones have aluminum backings to dissipate heat. I have never close come to heating the backing up. Which tells me that it is made for much more pressure than my little agates ever created being hand held. This wheel is 2 years old and seen it all. Hard to say what quality ranking it is. It was cheap at Harbor Freight. Less then $20. But for the oversea manufacturers, they may be shipping the best quality for such a large account. I have recently purchased a couple of larger wheels. They perform similarly. This is the duty requirements, hard silicified coral:
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Post by captbob on Dec 5, 2014 11:40:19 GMT -5
I was just out on my back patio enjoying the sun, 80° weather and the peacefulness of the day and the question came to me -
how far from your house is this new tumbler gonna be?
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Post by Deleted on Dec 5, 2014 13:24:56 GMT -5
Have you installed a saddle on the king kong yet? lol
Elin will make you nay segment you want. Just call the specs. All they do is put the diamonds and powdered matrix metal in a mold and run it thru a kiln. Making a mold can't be difficult for something so simple as a rectangular shape.
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jamesp
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Post by jamesp on Dec 5, 2014 13:25:36 GMT -5
I was just out on my back patio enjoying the sun, 80° weather and the peacefulness of the day and the question came to me - how far from your house is this new tumbler gonna be? Glad the weather is pampering you captbob. Soak some rays for me whilst basking. Good point. It will be noisy. It will be in a greenhouse about a 1000 feet away. It is a benefit to have noise in the plant area, keeps the deer away. No way this would be in a basement. those bowls make great:
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jamesp
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Post by jamesp on Dec 6, 2014 7:48:26 GMT -5
Have you installed a saddle on the king kong yet? lol Elin will make you nay segment you want. Just call the specs. All they do is put the diamonds and powdered matrix metal in a mold and run it thru a kiln. Making a mold can't be difficult for something so simple as a rectangular shape. She said they do not have 16 grit segments. Many of those companies list it in their options. Very few stock them. Found some #16 segments for concrete grinders. They were overkill(10mm thick) and $1-1.4 each @ 300 min QTY. The 1/8 in thick segments would be perfect. Or the 4 inch diameter segments soldered to 4 inch diamond cups. Solder a bunch of 4 inch discs, fill in with smaller segments. I believe the outside ring is a solid sintering on this new 5 inch multi-purpose. It says 5mm thick, a standard sintering thickness. I have never seen sintering rotate without a steel or aluminum backing.
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Post by Drummond Island Rocks on Dec 7, 2014 20:16:27 GMT -5
I came across these photos of this old slant rotary tumbler and it kinda reminds me of a small scale version of what your doing. metal rounded bottom barrel held at an angle Chuck
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Post by MrP on Dec 7, 2014 20:41:12 GMT -5
I came across these photos of this old slant rotary tumbler and it kinda reminds me of a small scale version of what your doing. metal rounded bottom barrel held at an angle Chuck I have one of those. I thought it would work well on very soft material because it turns slow and gentle. I guess I need to try it.............MrP
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jamesp
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Post by jamesp on Dec 8, 2014 7:34:16 GMT -5
I came across these photos of this old slant rotary tumbler and it kinda reminds me of a small scale version of what your doing. metal rounded bottom barrel held at an angle Chuck Novel design, using the barrel as a pulley sheave. It must be a parts tumbler of some sort. May be noisy like mine. MrP has one. May want to run that one either far from the house or in a well insulated shed Michael. Does it have a name ? Or description ? I did mine narrow and tall. May run it w/out a slant to start out to see how she coarse grinds. Got the cap yesterday, it was a special order for a 5 inch pipe, not a Home Depot item(from Zorro tools). May fill it with rocks and see what happens today. You guys way hear it in Minnesota and Great Lakes area. Will video Ordered some 20 grit diamonds. May braze them on the inside of a smaller bowl and run it fast at a slant.(new machine) To see if it will scrub the rocks while they tumble. Adjust the slant to create a gentle tumble while the grit lined bowl spins fast slipping under the rocks grinding them. It could be open, or steal the wife's shower cap I would guess that is a light duty parts tumbler. Can't tell how thick the barrel is.
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Post by Drummond Island Rocks on Dec 8, 2014 9:12:04 GMT -5
I came across these photos of this old slant rotary tumbler and it kinda reminds me of a small scale version of what your doing. metal rounded bottom barrel held at an angle Chuck Novel design, using the barrel as a pulley sheave. It must be a parts tumbler of some sort. May be noisy like mine. MrP has one. May want to run that one either far from the house or in a well insulated shed Michael. Does it have a name ? Or description ? I did mine narrow and tall. May run it w/out a slant to start out to see how she coarse grinds. Got the cap yesterday, it was a special order for a 5 inch pipe, not a Home Depot item(from Zorro tools). May fill it with rocks and see what happens today. You guys way hear it in Minnesota and Great Lakes area. Will video Ordered some 20 grit diamonds. May braze them on the inside of a smaller bowl and run it fast at a slant.(new machine) To see if it will scrub the rocks while they tumble. Adjust the slant to create a gentle tumble while the grit lined bowl spins fast slipping under the rocks grinding them. It could be open, or steal the wife's shower cap I would guess that is a light duty parts tumbler. Can't tell how thick the barrel is. LEWACO JUNIOR TUMBLER www.ebay.com/itm/VINTAGE-LEWACO-JUNIOR-TUMBLER-LAPIDARY-ANTIQUE-/281523143198
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jamesp
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Post by jamesp on Dec 8, 2014 9:26:51 GMT -5
Novel design, using the barrel as a pulley sheave. It must be a parts tumbler of some sort. May be noisy like mine. MrP has one. May want to run that one either far from the house or in a well insulated shed Michael. Does it have a name ? Or description ? I did mine narrow and tall. May run it w/out a slant to start out to see how she coarse grinds. Got the cap yesterday, it was a special order for a 5 inch pipe, not a Home Depot item(from Zorro tools). May fill it with rocks and see what happens today. You guys way hear it in Minnesota and Great Lakes area. Will video Ordered some 20 grit diamonds. May braze them on the inside of a smaller bowl and run it fast at a slant.(new machine) To see if it will scrub the rocks while they tumble. Adjust the slant to create a gentle tumble while the grit lined bowl spins fast slipping under the rocks grinding them. It could be open, or steal the wife's shower cap I would guess that is a light duty parts tumbler. Can't tell how thick the barrel is. LEWACO JUNIOR TUMBLER www.ebay.com/itm/VINTAGE-LEWACO-JUNIOR-TUMBLER-LAPIDARY-ANTIQUE-/281523143198That is a piece of vintage history Chuck. Too novel. Someone needs to start a rock tumbling museum. My machines could go in the 'odd and unusual' corner ha. the Viking is vintage too, but seems to be state of the arts.
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jamesp
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Post by jamesp on Dec 8, 2014 13:52:03 GMT -5
It took 42 pounds of rock to fill to 3/4 full. Has a heavy grinding sound. Seems to be working fine. No leaky welds !!
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Post by captbob on Dec 8, 2014 14:15:48 GMT -5
that outta keep the deer at bay good thing you don't have neighbors
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Post by iant on Dec 8, 2014 14:41:50 GMT -5
Fantastic machine. I've had to shut my windows though!
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jamesp
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Post by jamesp on Dec 8, 2014 14:49:14 GMT -5
that outta keep the deer at bay good thing you don't have neighbors Thanks captbob. The video camera is pretty sensitive, makes it sound louder, especially the higher pitch sounds. I would say that it is quieter than my PVC barrels though. Them loud, due in part to their fast rotation. Sounds like some heavy grinding, sound is more of a crushing sound. Feeling good about it doing some rounding.
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jamesp
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Post by jamesp on Dec 8, 2014 14:50:55 GMT -5
Fantastic machine. I've had to shut my windows though! This one is for the farm Ian, way over on the back 40. Or a sound proof enclosure.
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Post by iant on Dec 8, 2014 14:57:13 GMT -5
Quality build that - looks totally solid!
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jamesp
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Post by jamesp on Dec 8, 2014 15:28:14 GMT -5
Quality build that - looks totally solid! Motor gets hot. May go from 1/4 to 1/3. Knew it was on the edge. New oil for the worm gear may change that. Thanks Ian. Watch the fingers, gear boxes w/chains unforgiving.
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Post by Drummond Island Rocks on Dec 8, 2014 16:43:03 GMT -5
very cool to watch this project go from idea to working build. How much $$$ for a molded rubber barrel for those of us that live on less then 100 acres, LOL
Chuck
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jamesp
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Post by jamesp on Dec 8, 2014 18:47:17 GMT -5
very cool to watch this project go from idea to working build. How much $$$ for a molded rubber barrel for those of us that live on less then 100 acres, LOL Chuck Thanks Chuck. Ran some limestone covered coral in it. Had a nice removal of the soft coating pretty quick. A barrel that can support 40 pounds of rock and itself from one side may be expensive to make. Want to see how good of a grinder this thing is, along with grit life.
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