jamesp
Cave Dweller
Member since October 2012
Posts: 36,154
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Post by jamesp on Feb 6, 2016 17:01:49 GMT -5
7 inch wheel with what looks like a continuos sintered diamond face as opposed to a coated face. Not sure, but looks like it. Plus it is mounted on aluminum, which increases the chance that it is a one piece sinter. A beast. This would be an advancement in sintering technology due to it's large size. Curious about the width of the ring, wider better. Standard M14-5/8 arbor thread. Coarse medium and fine. Sintering probably 5mm thick, should last a lifetime. Made to run dry, so very tough. Thinking 1500-2000 RPM, a fraction of design speed, and a lapper containment to water feed it. Will have to figure out how to purchase it, cost. Link to company: www.alldiamondtools.com/diamond-grinding-cup-wheel---continuous-row-cup-wheel.html
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jamesp
Cave Dweller
Member since October 2012
Posts: 36,154
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Post by jamesp on Feb 6, 2016 17:02:56 GMT -5
Have sent message, located in China. Old style has small segments brazed on the cup. Not smooth for lapidary work.
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SirRoxalot
freely admits to licking rocks
Member since October 2003
Posts: 790
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Post by SirRoxalot on Feb 16, 2016 11:24:07 GMT -5
Please keep us informed as to cost and useability of this item. Intriguing stuff.
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Fossilman
Cave Dweller
Member since January 2009
Posts: 20,680
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Post by Fossilman on Feb 16, 2016 11:31:05 GMT -5
Yes,very interested too!!
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Post by Drummond Island Rocks on Feb 16, 2016 11:46:50 GMT -5
Reminds me of a brake rotor. hopefully lasts longer Chuck
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jerrys
spending too much on rocks
Member since February 2014
Posts: 263
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Post by jerrys on Feb 16, 2016 12:19:07 GMT -5
what are you using these for?
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jamesp
Cave Dweller
Member since October 2012
Posts: 36,154
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Post by jamesp on Feb 16, 2016 13:09:07 GMT -5
Yes,very interested too!! They may want minimum of 10. Difficult to decode communications with those guys.
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jamesp
Cave Dweller
Member since October 2012
Posts: 36,154
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Post by jamesp on Feb 16, 2016 13:20:08 GMT -5
what are you using these for? For the roughest of shaping like this: for more precision like >1.5 inch spheres But thinking about going with medium and fine grits on the new continuos faced ones if I can get my hands on them as a lap. i think the diamond sintering on the 7 inch continuous is 10mm thick which should last 2 lifetimes. And diamond profiling tools can be used to grind profiles in them.
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jamesp
Cave Dweller
Member since October 2012
Posts: 36,154
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Post by jamesp on Feb 16, 2016 13:21:25 GMT -5
Reminds me of a brake rotor. hopefully lasts longer Chuck Diamond sintered rotor should last a long time, may be concerned about the brake pads .
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Post by mohs on Feb 16, 2016 16:33:18 GMT -5
cool james! look like a great plate for lapping heart half edges if you find a source let us know thanks for posting!! mohs
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jamesp
Cave Dweller
Member since October 2012
Posts: 36,154
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Post by jamesp on Feb 16, 2016 23:51:00 GMT -5
cool james! look like a great plate for lapping heart half edges if you find a source let us know thanks for posting!! mohs You can see a saddle profile in the 4 inch wheel(1st video) from constant use. Took a long time to get that saddle. I did mention a profiling block made of synthetic diamond that could shape profiles in that sintering material. Of course that wheel is way to coarse at 40 grit plus the segments makes fine work not possible.
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Post by mohs on Feb 17, 2016 8:37:07 GMT -5
rock’n james I hadn’t seen those videos’!
so are these two different setups you have? 2 different disc? The rpm speed of the fist video seem much faster
The way you grind cut that rock was industrial performance.
rounding/smoothing that rock rolled! Were you dipping it in water ? you were ringing the bell! Sounded just like old ma bell telephone ring.
innovative inexpensive ideal!
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jamesp
Cave Dweller
Member since October 2012
Posts: 36,154
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Post by jamesp on Feb 17, 2016 17:58:51 GMT -5
rock’n james I hadn’t seen those videos’! so are these two different setups you have? 2 different disc? The rpm speed of the fist video seem much faster The way you grind cut that rock was industrial performance. rounding/smoothing that rock rolled! Were you dipping it in water ? you were ringing the bell! Sounded just like old ma bell telephone ring. innovative inexpensive ideal! Took some safety measures for doing tumbles Ed. Same machine, just added some guards. Slowed it to 2400 RPM for the 7 inch wheel. The wheels are interchangeable via center nut as on a bench grinder. Can run it much slower, for coarse the fast works fine. Lots of fans to remove dust !! Done dry. Those wheels are designed for much more pressure and heat than wimpy lapidary work. I want the SMOOTH ones with out the segments, they are new as far as I know.
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Post by mohs on Feb 17, 2016 18:07:17 GMT -5
dry as it advantages!
is that a 240 phase motor? what it rated?
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jamesp
Cave Dweller
Member since October 2012
Posts: 36,154
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Post by jamesp on Feb 17, 2016 19:28:18 GMT -5
dry as it advantages! is that a 240 phase motor? what it rated? 1/4 HP 1725 RPM 110 VAC Ed. You could hear it slow down on the first video. But I was flat laying down on that rock. 1/4 HP is plenty Ed. But a 1/6 HP would probably not be enough. Got lucky sizing the motor first try. Motor pulley is 3 inches, shaft pulley is 2 inches. So 3/2 X 1725 = 1.5 X 1725 = 2588 RPM. It actually turns 2400. You could run it at 1200 RPM and do fine. Especially if running finer diamond grits like 120 and 240. Those wheels come in coarse medium fine. Those speeds and grits would allow cutting more delicate stuff like the Edhearts pat. pend.
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Deleted
Deleted Member
Member since January 1970
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Post by Deleted on Feb 17, 2016 20:57:59 GMT -5
Continuous sinter or one big segment?
Is there an issue with making big segments other than cost or potential for small volume?
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jamesp
Cave Dweller
Member since October 2012
Posts: 36,154
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Post by jamesp on Feb 17, 2016 23:37:47 GMT -5
Continuous sinter or one big segment? Is there an issue with making big segments other than cost or potential for small volume? This looks like a one piece segment. It's a big one if it is. I may have read they have to manufacture segments in like 3-4mm layers. Those saw blade segments looked like they were fused layers. Mine were like 10mm X 25mm X 15mm. My verbiage may not be proper in calling it continuos. The gaps are a problem for any chance of doing gentle work. The way I read the specs the this 7 inch wheel has a 10mm thick sinter, that is very thick. It comes in fine medium and coarse. Same company(Gushi) lists a 9 inch too. Guessing they will be making 6 and 8 inch grinding wheels out of a solid sinter soon. Maybe laminated with steel.
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