OldTools Archive
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247181 | leeburk@a... | 2014‑04‑17 | Old Dog, New Trick - AKA Diamond sharpening |
I have some carbide tipped turning tools recently acquired from Ebay. How do I put an edge on those? Especially the gouges? Sure diamond may work if one has some diamonds laying around, but haven't I heard in the ancient past that sometimes something softer can be used to cut something harder? Maybe I'm thinking of Rock, Paper, Scissors, I dunno. You grizzled old engineers out there, bestow your wisdom. Lee |
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247182 | James Thompson <oldmillrat@m...> | 2014‑04‑17 | Re: Old Dog, New Trick - AKA Diamond sharpening |
On Apr 16, 2014, at 9:18 PM, leeburk@a... wrote: > > I have some carbide tipped turning tools recently acquired from Ebay. How do I put an edge on those? Especially the gouges? Sure diamond may work if one has some diamonds laying around, but haven't I heard in the ancient past that sometimes something softer can be used to cut something harder? Maybe I'm thinking of Rock, Paper, Scissors, I dunno. You grizzled old engineers out there, bestow your wisdom. > Lee Get thee a silicon carbide grinding wheel in a fine grit. The wheels are green in color. Then get thee a good sharpening jig made for sharpening turning tools, particularly gouges. Pay more than $100 for this jig. There are cheaper jigs, but after you buy one and find that they don't work well, you will buy a good one anyway. Can you sharpen carbide turning tools without a jig? Of course. After you have worn them out because you need to keep sharpening them because they were not properly sharpened in the first place, and then you buy new ones. By then you will have gained the skills necessary to sharpen them by hand. I strongly recommend the good jig. Do you need carbide turning tools? As you will learn, the answer is no. But we all have to go through the process. Ask yourself how much actual time you will spend turning. Few of us really do a lot of turning. I have several of the carbide tools, and the sharpening stuff. And now that I know the name of this game, I would NOT EVER buy another carbide tool. But like I said, everybody has to go through this to learn that they don't need them. The only exception is the professional bowl turner. He needs them. We don't. But hey! What do I know? |
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247186 | paul womack <pwomack@p...> | 2014‑04‑17 | Re: Old Dog, New Trick - AKA Diamond sharpening |
leeburk@a... wrote: > but haven't I heard in the ancient past that sometimes something softer can be used to cut something harder? Ooh - that's a nasty and deceptive partial truth/understanding there. What you're semi-recalling is that *when lapping* the harder of the two metals (commonly cast iron and high carbon steel, in engineering circles) is worn away. But the thing doing the wearing is diamond or SiC grit, which is harder than both. The explanation is that the abrasive particles embed in the softer material, and (hence) scrape over the harder material. In model/workshop engineering some processes use lead laps to work mild steel. BugBear |
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247227 | leeburk@a... | 2014‑04‑17 | Re: Old Dog, New Trick - AKA Diamond sharpening |
So how do they drill, grind and polish a diamond, if there is nothing harder to use in the process? Ergo, the drilling, grinding, polishing medium must be something softer, eh? Lee -----Original Message----- From: paul womack |
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247231 | Ken Shepard <waruba@c...> | 2014‑04‑17 | Re: Old Dog, New Trick - AKA Diamond sharpening |
Diamond dust - really. On Thu, Apr 17, 2014 at 2:45 PM, |
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247237 | Michael Blair <branson2@s...> | 2014‑04‑17 | Re: Old Dog, New Trick - AKA Diamond sharpening |
> So how do they drill, grind and polish a diamond, if there is nothing > harder to use in the process? You use industrial grade diamonds. That's what is actually used in cutting diamonds. > Ergo, the drilling, grinding, polishing medium must be something > softer, eh? Nope. Mike in Sacto |
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247285 | Brent Beach <brent.beach@g...> | 2014‑04‑19 | Re: Old Dog, New Trick - AKA Diamond sharpening |
Lee On 2014-04-16 21:18, leeburk@a... wrote: > > I have some carbide tipped turning tools recently acquired from Ebay. How do I put an edge on those? Especially the gouges? Sure diamond may work if one has some diamonds laying around, but haven't I heard in the ancient past that sometimes something softer can be used to cut something harder? Maybe I'm thinking of Rock, Paper, Scissors, I dunno. You grizzled old engineers out there, bestow your wisdom. https://www.youtube.com/wa tch?v=kLQk4U5ihz4 Have not tried it myself, but if it works let us know. Notice he says light pressure. Brent -- Brent Beach Victoria, BC, Canada |
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247287 | JAMES THOMPSON <oldmillrat@m...> | 2014‑04‑19 | Re: Old Dog, New Trick - AKA Diamond sharpening |
On Apr 18, 2014, at 8:24 PM, Brent Beach |
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