USE/CARE OF HANDTOOLS & MEASURING TOOLS - OD1621 - LESSON 2/TASK 2
(2) Grinding.
(a) To reshape a broken blade or to remove nicks, grind knives on
a grinding wheel or grindstone.
Sharpen and hone on an oilstone after
grinding. Dip the blade in water frequently during the grinding process.
FIGURE 105.
SHARPENING A POCKET KNIFE.
(b) A putty knife is ground at right angles against the edge of a
grinding wheel to remove nicks and to square up a worn blade.
Move the
blade from side to side while grinding (figure 106 on the following page).
Do not remove any more metal than is necessary. Remove the wire edge on an
oilstone after grinding.
(c) The drawknife may be ground with a single or double bevel.
The bevel must be restored to its original shape.
Determine the original
shape of the bevel by examining the unworn portions at the ends of the
cutting edge.
If the bevel cannot be determined by examination, make the
bevel length approximately twice the thickness of the blade at the point
where the bevel starts. Correct bevel length and shapes for drawknives are
shown in figure 107 on page 138. The bevel must never be ground convex.
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