Morso Model F, Instruction Manual, Page: 38 / 67

Instruction Manual
MORSØ Mitring Machine
Model F
38
Grinding of Knives
When grinding the knives you must 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
28°.
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 must use a soft fine-grained silicon carbide hand flat stone
that must be kept soaked in oil or kerosene.
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 29°
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 the knife to press too hard against the wood during
the cutting, causing damage or bruising to the moulding.
Please also see page F-4: Regulation of Draw Bar
Service F-3