USE/CARE OF HANDTOOLS & MEASURING TOOLS - OD1621 - LESSON 2/TASK 2
7 After whetting the flat side on the fine grit side of the
stone, turn the chisel over and place the bevel side down, holding it at the
same angle as was used when whetting on the coarse side of the stone. Take
two or three light strokes to remove the burr.
8 It may be necessary to take one or two light strokes again
on the flat side of the chisel to remove the burr.
9 To get an extremely sharp edge, the chisel must be
stropped. This is done by rubbing both sides of the chisel's cutting edge
on a soft wood block or on a leather or canvas strap, putting the chisel
down and stroking the edge in one direction only, moving the chisel toward
the handle end, as shown in figure 88 on the previous page.
10 To test the sharpness of the cutting edge, hold the chisel
where a good light will shine on the cutting edge.
A keen edge does not
reflect light in certain positions. If there are no shiny or white spots in
this position, it is a good edge.
(b) Grinding. Grind the bevel of a woodworker's chisel concave to
the shape of the abrasive wheel used, or to a perfectly flat or straight
bevel (figure 89 on the following page). The length of the bevel should be
approximately twice the thickness of the chisel, or slightly longer if the
chisel is to be used to cut soft wood.
1 Square the cutting edge and remove nicks.
Adjust the
grinder tool rest so that when the chisel is held upon it, the edge will be
ground at right angles to the length of the chisel (figure 90 on the
following page).
2 After squaring, readjust the grinder rest to the position
that will give the correct bevel. Check the bevel angle by looking at it
from the side when the grinder is not operating.
During grinding the
cutting edge must be kept at right angles to the length of the chisel, while
the chisel blade rests on the grinder wheel tool rest.
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