Sterlco ST500 Series Central Granulator - Manual (Page 78)

78
MAINTENANCE
SECTION 6-13
Knife Sharpening
BED KNIFE SHARPENING
Each bed knife is provided with two
cutting edges. When the exposed edges
become blunt, the knives can be turned
over and repositioned to present the new
cutting edges.
It is not necessary to grind bed knives to
the closely matched tolerance of the rotor
knives and as with the rotor knives, small
nicks in the cutting edges will not seriously
affect knife cutting efficiency. Bed knives
smaller than the minimum dimension
shown must be replaced along with their
fasteners.
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 previous page indicate
the rotor knife and bed knife combinations
that will work for each type of rotor knife.
EXAMPLE: A 55° land rotor knife with a
4.200 inch " A " dimension will work only
with bed knives having an "E" dimension
of 0.730 or more.
NOTE: Replacement knife sets and knife
re-sharpening services are available from
Sterling Engineering. Contact the
Customer Service Department at 847-273-
7700 or 800-229-2919.