USE/CARE OF HANDTOOLS & MEASURING TOOLS - OD1621 - LESSON 2/TASK 2
chisel increases or decreases the inclination of the guiding bevel and
causes the chisel to take a heavier or lighter cut. If the hand is held too
low on the shank, the chisel will run out before the end of the cut; if held
too high, progress will be slow, owing to the difficulty of guiding the
chisel.
5 When chipping wrought iron or steel, wipe the edge of the
chisel with an oil saturated cloth frequently to lubricate the contacting
surfaces, and to preserve the cutting edge of the chisel.
6 After every two or three blows, draw the chisel back
slightly from the chip. This tends to ease your muscles, giving you better
control over the job.
7 When chipping cast metal, begin at the ends and chip toward
the center to keep from breaking corners and edges.
8 Take cuts from 1/16 to 1/32 inch.
Leave enough stock so
that the surfaces may be finished with a file.
9 When chipping keyways with a cape chisel, an ample margin
for filing should be left both on the sides and on the bottom.
10 When chipping a rather wide surface, first use a cape
chisel to cut grooves, then use the flat chisel to chip the stock between
the grooves.
(c) Cutting Wire or Round Stock. When a suitable hacksaw is not
available to cut round stock, the chisel may be used.
1 Mark off the guideline and place the work on the top face
of an anvil or other suitable working surface.
2 Place the cutting edge of the chisel on the mark in a
vertical position.
3 Lightly strike the
chisel
with
a
hammer
and
check
the
chisel mark for the desired cut.
4 Continue to strike the chisel until the cut is made.
The
last few cuts should be made lightly to avoid damage to the anvil, the
supporting surface, or to the chisel.
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