31
General Sharpening Procedures
Somewhere in the mists of time man discovered that a
wedge-shaped rock could be used to divide things. It
was probably only a matter of days before he found that
it was also a handy little prying tool, and probably only
a matter of minutes after that when he damaged the tip
prying something that really needed a bigger rock. The
pattern for the use and abuse of chisels was set early in
the tools’ history.
CHISELS
Chisels do not come from the store ready to use. Most
have been ground to a basic shape, a few have been
honed, none have been lapped and almost all have been
dipped in lacquer to prevent rust. The fi rst thing to do to
your new chisel is to remove the lacquer.
Removing the Lacquer
Lacquer must be removed from the face of the chisel
and the bevel. On all except mortise chisels, it is not
mandatory to remove the lacquer from the back and the
sides, but my preference is to strip it all off up to the neck.
Otherwise, you have scuffed lacquer on part of the tool,
which not only looks ugly but also can give you a false
sense that the tool is still rustproofed. Lacquer thinner
or paint stripper can be used to remove the lacquer. Be
sure the thinner does not get on the handle, since it can
soften some plastics and will strip lacquer off wooden
handles.
Lapping the Face of the Chisel
In the condition it comes from the factory, the face of
the chisel will have grinding marks on it. If you did
not fi rst lap the chisel, but devoted your attention only
to the bevel, regardless of how well you honed that
bevel it would still be intersecting with a grooved face
and the resulting edge would be ragged. So the fi rst
thing you have to do is remove these grind marks and
make the face of the chisel as smooth as possible (as
explained below).
There is a second reason that lapping may be necessary;
the face of the chisel may not be fl at. Although a slight
hollowness can be accepted in a chisel face, it cannot
have any belly and still function well. A chisel with a
belly in it should be returned to the vendor.
Appendix C
General Sharpening Procedures
The Anatomy of a Chisel
A chisel comes from the factory with grinding marks on its
face (top). These marks must be removed to create a sharp
edge and to flatten the face (above).
Bolster
Shock washer
Tang
Handle
Neck
Shoulder
Beveled edge
Land
Bevel
Back
Face
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