Craftsman 146.669950 Owner's Manual page 8

If blade is curved at the end, rotate knife
handle toward you when approaching
knife's tip as shown in Fig. 14.
Sharpen the other side of the blade the .
same way as described above except
hold knife as shown in Fig. 15 & 16.
Deburr as described on page 7.
Fig. 1 5
PULL TO
LEFT
Fig. 1 6
Fig. 1 4
SHARPENING TOOLS
Micro-Bevel--some tools such as
chisels and plane blades require
what Is called a "micro-bevel" edge
to improve tool performance and
cutting edge strength.
This is accomplished by grinding in a
primary angle, 25o-30 ° for example,
then grinding in a secondary angle,
30°-35 ° for instance, on the tip of the
cutting edge. See Fig. 18.
In most cases it is only necessary to
touch up the secondary angle to
keep edges keen. (Fig. 19)
Use "visual check" method described
on page 6.
PRIMARY ANGLE_r /
SECONDARY OR _ , _ '// /
Fi M,CRO-.EVELANGLE
g. 17
APPROXIMATE LY
1/5 OF BLADE
THICKNESS_
!
Fig. 1 8
OR
MICRO-BEVEL
ANGLE
Fig. 1 9
PRIMARY ANGLE
TOUCHING UPTHE
MICRO-BEVEL