Hand Tools Archive

Subject:
making peculiar names
Response To:
Re: Weaver chisel grind ()

David Weaver
some of the details of this may have been missed from prior discussions.

Convex and flat edges are often discussed, but when you start examining where failure occurs and how much wedging force there is with a convex or blunt angle chisel, if you're lazy (I am) you start trying to go back the other way and look for a free lunch.

There's no arbitrage in chiseling, but I think this edge is probably on the efficient frontier of what's available.

Cliff stamp was talking about this with knives, as he'd done a bunch of testing and found that the most "capable" steels (as determined by gurus, not necessarily objectively the most capable) are often provided in super fat knife profiles and the performance of them for actually doing things is terrible compared to a cheap simple steel thin bladed stamped knife.

He started commenting on keeping the grind of a knife fine, and then working the very edge of the knife to a given profile as a single bevel would leave the failure point at the edge of the knife, and removing that failure point via modification would push eventual failure further into the bevel. The idea being doing only enough to eliminate both.

So I've found over time (Without knowing it) that my general purpose chisels have crept toward a 20 degree primary angle and a small secondary angle around 25 and then a roll. Some terrible chisels still didn't tolerate this (r. sorby chisels are really lovely except they are really soft), so I rounded over the edge of a couple (just the very edge) with a buffer and found they did well.

I just mortised a plane with one.

So, more or less, it's a knife edge, as you say. But since one of my favorite chess channels calls a knight move a knight move ("knife F4"), I'm going to steel knight.

And call it a knight edge.

So that nobody has a clue what we're talking about.

Messages In This Thread

Weaver chisel grind *PIC*
Some quick tests (lots of pictures) *PIC*
Some chisel pictures *PIC*
Re: Some chisel pictures
Re: Some chisel pictures *PIC*
astonished by picture quality *NM*
excellent pictures!
Another test *PIC*
Re: Another test
question
Re: question *PIC*
Re: question
could be a database issue...
Second try for picture *PIC*
yellow pine *NM*
Those pictures..
Nice piece of work
Re: Nice piece of work
Light source?
Re: Light source?
stitches.....
I've made a video.....
video...not for the meek...
It's a very funny video
comments on the two pictures.....
bevel width
It's the scale that escapes me
Re: It's the scale that escapes me
Looking forward to it, thanks! *NM*
More on the Weaver Bevel
Re: More on the Weaver Bevel
the premise is different in this case
I don't agree with limitation of your premise
You nailed it
This is hilarious
Jim - here's your guy
Well that escalated quickly.
Moving the needle
Re: Moving the needle *LINK*
Thanks for the memories *PIC*
Absolutely *LINK*
Positioning *LINK*
Where to find unhndled Narex chisels? *NM*
Taylor Tool Works
narex and their hardening....
how I achieved the Weaver Bever
Weaver Bevel
Further defining the Weaver Bevel
perception of penetration?
solving a problem, not creating one...
Re: solving a problem, not creating one...
BTW
rolling over edges....
On secrets, incantations and open source
Weaver grind—how is convexity added?
Marc Adams
Could've been felt...
Re: Weaver grind—how is convexity added?
The world is upside down :)
I took a nine day Sellers course
Re: I took a nine day Sellers course
it makes sense
How about making a video?
Period costume?
Re: How about making a video?
Trying things out
Re: Trying things out
Re: Trying things out
failed to figure things out...
Re: How about making a video?
Re: How about making a video?
variations on the already done...
thoughts *PIC*
Re: Weaver grind—how is convexity added?
Re: Weaver chisel grind
making peculiar names
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