Sterlco ST500 Series Central Granulator - Manual (Page 77)

77
MAINTENANCE
SECTION 6-12
Knife Sharpening
ROTOR KNIFE SHARPENING
The rotor knives must be sharpened to within 0.003"
(0.076 mm) of each other. Greater dimensional
variations prevent the proper setting of the knife gap
and may create other serious complications.
Grinding the cutting edge until it is free of nicks can
be wasteful. It is not harmful to allow small nicks to
remain in the cutting edge
.
WARNING
Do not install rotor knives, which are smaller than
the minimum dimension shown because the
fasteners, which secure these knives will interfere
with the cutting circle. The rotor will not be able to
rotate and the bed knives will be damaged.
It is important to note that the minimum dimensions
given for the rotor knife and bed knife cannot be
combined simultaneously to produce a cutting
combination. The grinding charts shown below and
on the following page indicate the rotor knife and bed
knife combinations that will work for each type of
rotor knife.
EXAMPLE: A keen edge rotor knife with 4.200 inch
" A " dimension will work only with bed knives
which have "D" dimensions of 0.790" or greater.
NOTE: Replacement knife sets and knife re
sharpening services are available from AEC
Engineering. Contact the Customer Service
Department at 508-399-6400 or 800-229-2919.