Dubbing a graver.

Gordon

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Would someone be kind enough to show a close-up tip of a dubbed graver. I've read a bunch of descriptions of HOW it's done, (and I'm sure that I'm being really dense), but I'm just not getting what is meant in a way that I can visualize what that looks like.
 
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#4
If you round the point a bit, just like a round graver. It should still cut and not plow, wouldn't it?

So only remove some metal from the bottom facets. Not the front.
 

SamW

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#5
For hard metal I double dub...I put a very small facet on the tip of the face at perhaps 80 or so degrees (compared to the heel) followed by rounding the heel very slightly. Cuts fine for me and lasts much longer cutting hard metals like stainless slides, etc. These are made on a fine grit ruby stone and almost need magnification to see.
 

SamW

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#7
The dubbed face angle is in relation to the heel so with my usual 8 or 10 degree heel (lift) the tool has a 70 or so face in relation to the length of the tool or in other words about a 10 degree cutting angle. Close to vertical but off enough to cut OK.
 

mitch

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#11
Sam. Now I understand. but--- Why not cut the whole face angle at a steeper angle?
The 'point' of dubbing this way is to make just the very tip of the graver stronger, where it is weakest and where virtually 100% of all gravers eventually fail. The remainder of the face, which is more gently sloped, and the edges up the sides of the face, still do much of the cutting and lifting metal up out of the groove, but the tiniest bit of the tip, which is buried at the bottom of the cut and enduring the highest forces, is no longer quite so fragile.
 

FANCYGUN

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#14
Jere
I do mine a bit different...i think....
When i am done sharpening myngraver, i just hold it upon my ceramic stone vertically and just scratch the tip on the ceramic this gives it a itty bitty blunt tip When cutting, the regular face angle does the removal but the blunted tip does not touch metal thus preserving the tip this is the way Frank Hendricks showed us how to do this using a ruby stone Now this i do not use when doing my banknote as I want a super sharp tip Im not going deep and the metal is resonably soft also
 

mitch

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#18
you made a nano-scorper, Sam! if i'm following him correctly, "The Other Sam" does much the same thing, but on the face.
 

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