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Chapter 5: Maintenance 30 of 41
Specifications for Re-sharpening Rotor Knives
All the rotor knives must be re-sharpened in sets. Each knife within a set must have a
tolerance within 0.003" (0.05 mm) for the total height, heel to cutting edge. Greater
variations within a set will result in improper knife gap settings and other operational
problems. (See “Rotor Knife Specifications.”)
Knives below the minimum dimension specified must not be used! Using knives below
the specified minimum can cause interference resulting in serious damage to the rotor and
cutting chamber.
When using a surface grinder to re-sharpen the rotor or bed knives, it is not harmful to
allow a few small nicks to remain on the cutting edge. Grinding the knife so that the
cutting edge is free from all nicks can be wasteful.
Figure: Rotor Knife Specifications
.382” ± .003
(9.5 mm ± .05)
30°
20°
Minimum Length 2.305” (58.5 mm)
New Knife Length 2.480” (63 mm)