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Post by mrgrimsdale on Nov 9, 2008 8:32:21 GMT
Got a revised page up herecheers Jacob |
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Post by Sgian Dubh on Nov 9, 2008 14:31:18 GMT
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dunbarhamlin
Full Member
Lutherie with Luddite Tendancies
Posts: 244
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Post by dunbarhamlin on Nov 9, 2008 14:36:11 GMT
Did try it a while back, but found I was getting too much bevel creep - so I try to maintain a flat bezel which clicks into registration nicely (most of the time  ) I tend not to use a secondary/tertiary bezel, so as with your method, regrinding is limited to when I damage an edge (or, in my case, when I've finally buggered up my preferred geometry. (though I tend to the hyperbolic, I try to stick with Euclidean  ) Steve |
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Post by mrgrimsdale on Nov 9, 2008 14:50:03 GMT
That is interesting Jacob, I am in the process of completely reworking my website and I have just loaded a hoary old chestnut of mine on sharpening to the site. It's my old tale, www.richardjonesfurniture.com/Articles-News/lesson-in-sharpen/lesson-in-sharpening.html A Lesson in Sharpening. This is the only web page in the format I have finally chosen to use. If anyone happens to go floating about the rest of my website from this page, all the other pages are in the old format, soon to be abandoned. Slainte. Brilliant Richard. Can I put a link in, next to the Museum of Woodwork link? I'll do it now - let me know if you have any objection. I put a lot of detail in my page because somehow it's like talking people out of a trance and back to reality ;D cheers Jacob |
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Post by jfc on Nov 9, 2008 14:57:44 GMT
I think that is where Jacobs rounded bevel comes from . Most people i know on site give the chisel a quick swipe and then back to work . after a while of quick swipes you end up with a rounded bevel but still a sharp chisel . When it gets too bad its time for a re grind .
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dunbarhamlin
Full Member
Lutherie with Luddite Tendancies
Posts: 244
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Post by dunbarhamlin on Nov 9, 2008 15:07:48 GMT
Loved in the first time, and again.
Reminds me of my old Dad at times that I'd be trying to help paint, plaster, wire up etc. Except he only let slip that he knew any Anglo Saxon when I turned forty, so it was along the lines of, "Stop pussyfooting around and just get it done."
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Post by mrgrimsdale on Nov 9, 2008 15:25:00 GMT
I think that is where Jacobs rounded bevel comes from . Most people i know on site give the chisel a quick swipe and then back to work . after a while of quick swipes you end up with a rounded bevel but still a sharp chisel . When it gets too bad its time for a re grind . You just have to be a bit careful with your quick swipe and not exceed 30 deg. The dipping/scooping action helps. Once you've got it you never need to re-grind again. This is good news as more tools are spoiled by overheating on a bench grinder, than anything else, IMHO |
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Post by Sgian Dubh on Nov 9, 2008 16:26:54 GMT
Can I put a link in, next to the Museum of Woodwork link? Jacob Help yersel'. Nothing wrong with links-- it's not as if they in any way infringe my copyright, intellectual property or anything else like that. Slainte. |
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Post by jfc on Nov 9, 2008 20:16:40 GMT
To be honest all the years i was on site i didnt even look at the angle so couldnt say or care . As long as i had a sharp chisel. When they got too bad the got re ground and it started again .
Spending more than 30 seconds sharpening a chisel on site when you are getting paid top money would probably get you sacked .
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Post by promhandicam on Nov 10, 2008 7:19:52 GMT
Great article Richard! Brought back memories of my apprenticeship - engineering not woodworking - where I had more or less the same experience with a load of drill bits and a bench grinder. Some became very short in the learning process but although I don't need to sharpen drill bits often nowadays, it was a lesson learnt for life - I can pick up any bit and without thinking sharpen it to the most appropriate angle for the material that I want to drill. Thanks for the reminder, Steve |
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Post by mrgrimsdale on Nov 10, 2008 17:46:31 GMT
snip I can pick up any bit and without thinking sharpen it to the most appropriate angle for the material that I want to drill. Well it can be like that with freehand sharpening - but only if you put the time in, make all the mistakes at first, and develop a feel (literally) for it. Sometimes it's like trying to teach people to walk, who just don't believe it's even possible, let alone easy! And a 10 second demo worth several hours of description. cheers Jacob |
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Post by Sgian Dubh on Nov 12, 2008 23:35:41 GMT
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Post by jfc on Nov 12, 2008 23:52:09 GMT
;D That brings back memories .
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Post by mel on Nov 13, 2008 1:24:09 GMT
[/quote]You just have to be a bit careful with your quick swipe and not exceed 30 deg. The dipping/scooping action helps. Once you've got it you never need to re-grind again. This is good news as more tools are spoiled by overheating on a bench grinder, than anything else, IMHO[/quote] says the man who sharpens his lathes tools with an angle grinder |
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Post by scraper on Nov 13, 2008 15:49:52 GMT
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Post by mrgrimsdale on Nov 15, 2008 13:03:21 GMT
says the man who sharpens his lathes tools with an angle grinder Did I say angle grinder? I meant belt sander. cheers Jacob |
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Post by mrgrimsdale on Dec 21, 2008 9:43:31 GMT
Just had a flash of inspiration - 'convex' or 'rounded bevel' is anathema to most because it implies or is equated with 'rounding over'. BUT the system I describe is the opposite - it could be called 'rounding under'  That should make it clearer ;D |
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woodchucker
New Member
Known to my family as 'His Bungleness'.
Posts: 34
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Post by woodchucker on Dec 25, 2008 9:17:35 GMT
Hmmm. I dun't like rounded bevels at all. An axe with an outside rounded edge bruises its way through the wood. Same goes for chisels I reckon. I sharpen freehand, and keep the bevel as flat as I can. But once I see a rounded bevel starting on a chisel, I get the honing guide out to reflatten it. If it's too far gone, then I regrind the 25 degree bevel and start again.
Reckon you get taught one way and it sticks. If my old teechuur knew I used a guide at all he'd spin in his grave!
Happy Christmas folks
Jack
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