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Sharpening Knives
NOTE: Only rotating knives for granulators with an open rotor can be sharpened. Other knives
are disposable and are replaced when necessary.
Sharpening Knives - Granulators with Open Cutter
Keep the complete set of knives together as one unit.
NOTE: To avoid unbalance, all the knives belonging to the cutter must be ground exactly the
same.
Be careful when handling the knives, they are sharp and can cause
personal injury.
NOTE: Get an experienced craftsman to sharpen the knives.
Only sharpen the marked surfaces and respect the given dimensions!
The knives must be sharpened exactly, to get the correct cutting and relief angles.
Otherwise the efficiency of the granulator will be impaired.
The knife must be cooled during sharpening. The knives must not be burned or
blued under any circumstances, otherwise they will loose their hardness and dura-
bility.
If the knife is blued or burned, they can not be repaired by grinding down the blued
or burned area. The hardened knife is then completely spoiled and has lost all its
hardness and durability.
Use the Conair grinding jig SF-20 (accessory, art no. 3-030324) and a surface
grinder with magnetic table. The jig gives exact correct cutting and relief angles.
• Remove the knives adjustment screws.
• Grind the worst knife to make the relief angle 35°.
• Tighten the knife in the right-hand position in the
jig, using spacer “A” beneath the rear of the knife
(see illustration).
Spherical washers should be used when tightening
the knife.
• Grind until all the irregularities on the knife edge
have disappeared.
• Retain the settings of the surface grinder and grind
all the other knives exactly the same.
A
Grind
Grind
7-6 l Service
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