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1. The shape of the blade tip of counter knife 1 affects most the sharpness of the knife. In many
cases, the sharpness becomes good only by sharpening of counter knife 1.
2. Sharpness becomes good only by sharpening plane A in the figure.
1) When the top end of plane B is dull and becomes round, sharpness becomes bad. Sharpen
plane B while taking care that the angle of the blade tip is not changed.
2) When the sharpness is bad although the blade plane is sharp enough, it is because the blade
planes of moving knife 2 and counter knife 1 do not simultaneously come in contact with
each other on the left and right sides (sections C and D in the figure). At this time, adjust the
inclination of counter knife 1.
6. MAINTENANCE
(1) How to sharpen the knife
1
2
1
D
C
Sections C and D of moving knife 2
has to simultaneously come in contact
with counter knife 1.
Remove the corner
and polish well.
Sharpen this
plane (plane A).
Blade tip (plane B)
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