Cutting Stick; Bevel Angle; Helpful Suggestions; Knife Care - Challenge CHAMPION 305 Instructions And Parts Manual

8.3.2 Cutting Stick

A worn cutting stick can affect the cut quality of the bottom sheets. When this happens, the cut stick
can be rotated. Usually, the stick should be rotated one or two times between knife sharpenings.
There are 8 possible cut stick positions. The stick can be rotated 4 times, and then turned end to
end, and rotated 4 times again.

8.3.3 Bevel Angle

Challenge recommends that bevel angles for the Champion 305 knives be in the range of 21° to 23°.
In general, a 21° bevel angle will provide better cut quality when cutting soft paper (such as
newsprint), recycled paper, or bound books. However, 21° angle knives can become dull sooner than
23° knives, which results in shorter knife blade life. A knife with a 23° bevel angle, on the other hand,
will not dull as easily, and can provide satisfactory results when cutting most types of paper. Knives
shipped with the Champion 305 from the factory have a bevel angle of 23°.

8.3.4 Helpful Suggestions


If your establishment is large enough to purchase more than one set of knives, have one set
beveled at 21° and the other at 23°. Note: A set consists of 3 knives: one in the machine,
one as a back up, and one at the grinder.

If the machine seems to strain but the cut quality is still good, reduce the pile height. You
may also carefully apply glycerin to the bevel when cutting hard, coated paper. Tie a cloth to
the end of a stick; dip the stick in glycerin, and apply. Never apply by hand! In lieu of
glycerin you may lightly rub white bar soap along the bevel. Lubrication will prolong the life of
your machine and reduce maintenance.

8.3.5 Knife Care


To prevent corrosion, knives are coated with light oil. It should be REMOVED WITH CARE.

While removing or installing a knife, be careful not to allow the edge to bump against the
machine. Nicks will result.

If a knife bolt is damaged, replace it.

Always keep knife bolts securely tightened.

Always use the heavy-duty knife bolt washers provided by Challenge. Failure to do so could
result in scratching or marring of the clamp face.

Store knives in a dry environment to prevent corrosion.

Never attempt to service a knife in any way.
8.0 Knife Installation/Changing
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