Morso Model F - Page 21

MASKINFABRIK
HARALDSVEJ 21
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Instructions manual
MORS0 Mitring machine
Model F
IV
picture F-3-1
Beware of the extreme
sharp knives
MORS0 F -9503 F-3/gb1
Service F-3
GRINDING OF KNIVES
When grinding the knives you may only grind
on the reverse of the cutting edge. You must
under no circumstances grind on the front or
ends of the knives, because the knives will
then be destroyed.
The angle of the cutting edge compared to
the front of the knife must be 30 .
Hollow grinding (recommended), figure I.
Using a grinding wheel the diameter must be
between 200 300 mm. Using a cup wheel
the diameter must be 150 mm.
Surface grinding figure II
Honing figure III
By setting the cutting edge you shall use a
soft fine-grained silicon carbide hand flat
stone that must be kept in oil or kerosine.
By setting the cutting edge you must under no
circumstances sharpen lengthwise of the
cutting edge, always crosswise.
First sharpen on the reverse side of the knife.
The flat stone is to be kept in an angle of
31° compared to the front of the knife.
Take off burrs, figure IV
After the honing the burrs on the front of the
knife are taken off with a slate flat stone
that must be quite straight.
The flat stone must here be completely in
line with the knife, because otherwise the
outer cutting edge will get an incorrect angle.
Even the slightest error here will cause that
the knife presses too hard against the wood
during the cutting.
Please also see page F-4 Regulation of Draw
Bar.
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