USE/CARE OF HANDTOOLS & MEASURING TOOLS - OD1621 - LESSON 2/TASK 2
of sharp edges. Stroke across the beveled edge using the full length of the
file in a diagonal stroke along the entire cutting edge of the blade.
Stroke smoothly from heel to tip. Never file the flat face of any tool. To
remove the wire edge (burr), place the blade on lightly oiled stone so that
the flat face is on the stone with the blade crossing the stone at right
angles.
Draw the blade across the stone from heel to tip.
Start each
stroke at the heel of the blade. Repeat the whole process to sharpen the
other blade.
FIGURE 116.
SHARPENING BEVELED EDGE SHEARS.
(3) Grinding. If the blades of shears are nicked, damaged, or if the
bevel is distorted by improper sharpening or prolonged use, it is necessary
to grind them. A single bevel is used; it may be flat or concave, but never
convex (figure 117 on the following page). The bevel angle varies with the
type of work for which the shears are used.
The bevel usually makes an
angle of from 60 to 85 with the flat inside face of the blade. Paper and
cloth cutting shears are ground to a bevel of approximately 60.
Metal
cutting shears are ground to a bevel of approximately 85.
151
Previous Page
