[pianotech] Of Chisels

[William Truitt]

And, as you know Jim, you have to flatten the back on the chisel before you
can begin to sharpen it.  Which is why the backs of these chisel has one or
more reliefs, which allows you to bring it to a flattened state much more
quickly.

 

Will

 

From: pianotech-bounces at ptg.org [mailto:pianotech-bounces at ptg.org] On Behalf
Of jimialeggio
Sent: Saturday, October 09, 2010 7:49 PM
To: pianotech at ptg.org
Subject: Re: [pianotech] Of Chisels

 





Sharpening a chisel well means sharpening BOTH sides of the chisel


agreed...the back, flat side of the chisel or plane blade (except in some
styles of bridge notching chisels which are curved or beveled ) has a
tendency to get lost in the "well that's too easy to think too much about"
department.  But getting that back dead flat and mirror finished is one of
the things that Japanese chisels allow one to (ah... sorry) hone in on,
shall we say. With their relieved back surface it makes it easier to achieve
that flat back plane.

Paying attention to how to create a dead flat honing surface capable of
bringing  your back up to mirror flatness pays off in terms of blade
sharpness and longevity, at least that's the take that finally really worked
for me and that I settled on.   No machines, but a Veritas honing guide,
coarse 120 grit diamond stone for coarse work and water stones for finish
work, with the water stones lapped on the diamond stone to true-up.  

Jim I





Jim Ialeggio
grandpianosolutions.com
978- 425-9026
Shirley, MA
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