Hand Tools Archive

Subject:
The rules of accommodation

David Weaver
often, tool tests are done putting a group of tools into exactly the same paramaters. Something standardized is done, and the results are reported.

But that can miss really spectacular tools that need only a little bit of accommodation. Examples of this are:
* adding a degree at a time to a bevel until the tool holds up
* taking a japanese chisel that's chippy out of its handle and tempering it a little further starting at 300 degrees F. Often an overhard chisel needs 25 degrees more tempering to become outstanding.
* the unicorn is a matter of sharpening and accommodation all in one

I think this goes in two steps - first, you examine damage and find out what it takes to make a tool hold up. Second, you have to determine whether or not that accommodation makes a tool that's tolerable to use.

One thing that comes to mind with me is that if I buy 30 used japanese chisels in harlequin lots, I will probably get 15 that are great to use, maybe 20 let's say. All they need is to be refreshed. They'll be $10-$15 each in total with shipping, but I know what to look for to get good quality chisels instead of a bunch of used coarsely ground hardware store chisels.

5 or 8 of those chisels will be hardware store tools (and I'll keep them to do things like grind the back of a chisel round, because who cares - half of the hardware store chisels may have so so edge holding).

suspending mathematics now and pretend that I have five left (3, 5, 8 or whatever). I will probably have about 5 chisels that are overhard. They will have been used little because they're almost impossible to sharpen on anything other than silicon carbide stones, and those stones cause the edges to crumble when they're finished. You get them set up, and they never seem to take the edge that shaves until they're buffed (buff is so gentle that it will accommodate). Then, you start to pare with them and even with the buffed tip, the tip chips and leaves lines.

Out of that 5, 3 or 4, or maybe all 5 will just need some retempering and then I may leave them on the hard side, but with the unicorn, they will last so long that I can make them hot before the edges fail. Over and over.

Just as we can accommodate tools, we can also accommodate stones. If I know that I have a washita that I really love, but it's aggressive on softer tools, I can either feed it what it likes to make a fine edge, or I can take tools that I have and make them into something that it likes.

It's so much more rewarding, and more favorable for continuous work in the shop to accommodate tools than it is to try to find something that relieves us of it.

Messages In This Thread

Sharpening Stone Ominbus - here we go
White Cretan - Novaculite *PIC*
stone pics... *PIC*
Black Sedimentary Stone *PIC*
pic of the stone *PIC*
Norton Queer Creek *PIC*
Pic of the stone *PIC*
Re: Pic of the stone
Re: Pic of the stone *PIC*
Purple Welsh Slate *PIC*
edge picture with a razor *PIC*
Very dense....
Re: Purple Welsh Slate *PIC*
Owyhee Jasper *PIC*
picture of the stone *PIC*
Chinese Agate *PIC*
Pic of the stone *PIC*
crest complete (And more dursol) *PIC*
Re: crest complete (And more dursol)
Re: crest complete (And more dursol)
Re: crest complete (And more dursol)
separate, since you got caught in the net...
Re: separate, since you got caught in the net...
Re: separate, since you got caught in the net...
Re: separate, since you got caught in the net...
Wrong R
Greasy/Coated India Stone *PIC*
Re: Greasy/Coated India Stone *PIC*
Gray China (Guangxhi?) natural waterstone *PIC*
pic of the stone *PIC*
Linde A - Paraffin Buffing Bar *PIC*
Try bee wax
Fine buffing compound
practically...
one other side benefit
Also with iron oxide bar
Picture of the "stone" *PIC*
The real Llyn Idwall *PIC*
Picture of the stone *PIC*
Re: Picture of the stone
Re: Picture of the stone
Re: Picture of the stone
two llyn idwalls
Re: two llyn idwalls
Re: Picture of the stone
Re: Picture of the stone
Re: Picture of the stone
Black Hone Slate *PIC*
pic of the stone *PIC*
Smiths Hard Arkansas *PIC*
pictures of the stone *PIC*
Re: Smiths Hard Arkansas
Re: Smiths Hard Arkansas
Japanese "Barber Oilstone" *PIC*
Pictures of the stone *PIC*
Slurried Trans Ark.. *PIC*
Am I understanding......
Re: Am I understanding......
This is sort of a loaded situation...
Re: This is sort of a loaded situation...
The other real issue with japanese finishers..
Re: This is sort of a loaded situation...
Re: This is sort of a loaded situation...
Re: This is sort of a loaded situation...
Re: This is sort of a loaded situation...
Re: This is sort of a loaded situation...
Clarifying hollow grind
Re: This is sort of a loaded situation...
dan's and washita.
Re: This is sort of a loaded situation...
Soft India?
soft vs. hard
Re: Soft India?
Now I am more confused
Re: I will make an exception…
Separately - a very good point made
Not defending wiley...
Re: Now I am more confused
Re: Now I am more confused
That explanation makes sense *NM*
Re: Am I understanding......
Picture of the stone *PIC*
Extra Fine India Stone *PIC*
Picture of the stone *PIC*
Sigma Power 13k *PIC*
Re: Sigma Power 13k
Re: Sigma Power 13k
Re: Sigma Power 13k
Re: Sigma Power 13k
Re: Sigma Power 13k
Re: Sigma Power 13k
Re: Sigma Power 13k
Re: Sigma Power 13k
Pic of the stone *PIC*
Re: Pic of the stone *PIC*
The rules of accommodation
Re: The rules of accommodation
Re: The rules of accommodation
Re: Pic of the stone
Re: Pic of the stone
Jackson Lea 5 micron "yellowcake" on softwood *PIC*
Is poplar soft enough
Re: Is poplar soft enough
picture of the wax bar *PIC*
Llyn Idwall *PIC*
Re: Llyn Idwall
Re: Llyn Idwall
Charnley Forest
releasing particles
Turkish Oilstone *PIC*
pic of the stone *PIC*
Dursol (Autosol) Metal Polish *PIC*
Tying up loose polishes - Autosol *PIC*
Re: Tying up loose polishes - Autosol
pic of the dursol *PIC*
(this one is good enough for everyone)
Re: (this one is good enough for everyone)
Re: (this one is good enough for everyone)
Re: (this one is good enough for everyone)
Re: (this one is good enough for everyone)
LV Green / Formax Microfine *PIC*
picture of the compound *PIC*
attractive old wives tales
Relevance? Question?
Re: Relevance? Question?
Clear summary thanks
Another White Alundum Japanese Stone *PIC*
Re: Another White Alundum Japanese Stone *PIC*
Very expensive (to me) japanese natural *PIC*
pic of the stone *PIC*
Re: Very expensive (to me) japanese natural
Dan's black Hard Ark *PIC*
pic of the stone *PIC*
Coticules - Fine and Coarse *PIC*
pic of the stones *PIC*
garnet
not sure
Unknown Japanese White Alundum *PIC*
the stone.. *PIC*
question
Looking at this picture..
I do both
Hand American 0.5 micron Green Chrome Ox *PIC*
pic of the oxide *PIC*
The purpose of the omnibus...
Not unicorn related, more clear
What else the creator of the weaver bevel post? *NM*
question for David
Re: question for David
Thanks David *NM*
Supremely Fine Japanese Natural Razor Stone *PIC*
Picture of the stone *PIC*
Re: Picture of the stone
Re: Picture of the stone
Re: Thank you, David
Re: Thank you, David
very few will care about mines or stamps...
Practical question
Re: Practical question + another regarding scale..
Re: Practical question + another regarding scale..
Scale overlay
Re: Scale overlay
sorry, addressed differently
request
Brief comments...
Re: Practical question
Re: Practical question
Fine White Okudo Suita *PIC*
Picture of the stone *PIC*
Shapton Cream *PIC*
Pic of the stone *PIC*
Fine washita *PIC*
Pic of the stone *PIC*
Kitayama waterstone *PIC*
Re: Kitayama waterstone *PIC*
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