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7 . 2 G r i n d i n g o f k n i v e s
( c o n t i n u e d )
• Grind the relief angle until the knife edge does not have
any irregularities.
•
NOTE:
Retain the settings on the surface grinder and grind
the relief angles on all the rotating knives exactly the same.
Grind the cutting angle on the knives
Cutting angle 50°.
• Install the knife in the fixture as shown in the
illustration, with the knive s rear lower edge
in the middle groove on the grinding fixture.
• Fix the knife, use the screws and the spherical
washers which belongs to the grinding fixture.
• Grind the cutting angle until the knife edge is
exactly 4 mm wide.
•
NOTE:
Retain the settings on the surface
grinder and grind the cutting angles on all
the rotating knives exactly the same.
Minimum knife dimensions
• The knives can be ground down to the dimensions
in the adjacent illustration.
After that, the knives are used up and must be
replaced by new ones.
Grinding of rear fixed knife no. 1, front fixed knife no. 2, the fourth and fifth
fixed knife.
The rear fixed knife no. 1, the front fixed knife no. 2, the knife no. 4 and no. 5 are
identical.
The knives have two cutting sides and are reversible.
Each knife can be ground with two cutting sides.
This means that the knives can be turned over and two cutting sides can be used
before they have to be re-ground.
The front and rear knives do not need to be ground to the same dimensions.
Follow the instruction, use grinding fixture and surface grinder with magnetic
table. The grinding fixture gives the fixed knives precise and correct cutting angles.
(continued)
Grind the cutting angle
4 mm
50°
55°
Min. 70 mm
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