Brush Bandit 65A, Operating & Parts Manual

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CHIPPER KNIVES
Only Bandit knives and hardware are recommended for use in your Bandit chippers. Only then can you be
assured of a quality product that fits and performs the best to the standards of excellence that is expected from
the Bandit chipper.
Chipper knives MUST be kept sharp at all times
for the ultimate chipper and knife performance. The
main cause of poor cutting performance is dull knives.
Dull Knives Cause:
- Excessive waste of engine horsepower
- Bad quality chips; chunks, slivers, etc.
- Excessive strain on knives and knife bolts and nuts
- Excessive strain on chipper disc bearings and total
machine
- Excessive chipping vibration damaging the machine
- Excessive strain on drives, PTO’s, engines, etc.
- Loss of time and money
The Dulling Of Chipper Knives Is Caused By:
- Poor quality knives
- Improper anvil to knife clearance
- Force feeding wood faster than chipper will accept
- Dirt, grit, or foreign material on the wood
- Chipper knives ground at wrong angle
- Improper care of knives and knife hardware
These are just a few factors, there are other
situations that can lead to the dulling of chipper knives.
NOTICE
- Keep knives sharp
- Keep knife angle correct when grinding
- Do not over grind so knife is narrower then allowed
width, or you will pack wood and break knives
- Use correct knife size, knife quality, knife bolts and
nuts, and torque knife bolts/nuts to the specified
ft/lbs.
- Replace knife bolts and nuts after (5) times of
tightening.
NOTICE
Many times a chipper knives cutting edge/point can
be brought back to a good edge with a #10 Flat
Bastard Mill File. This can reduce the amount of
regrinding.
Typical Knife Grinding Angles:
“Bolt-In” Knives = 30° to 31° Angle
Knives should be replaced in sets. These sets are
determined by the amount of resharpening done to
the knives (knife width). Regrinding knives reduces
the width of the knife. Knife replacement should be
done in sets of the same width knives. That will
reduce chipping vibration and increase chipping
performance.
Back Filing Knives
Many people in the chipping industry have found
that “Back-Filing” the knife point is helpful for a longer
knife life. Do not over file or grind the back file edge.
It is only intended to be a very small double edge point
on the knife. Too much of a back file will hinder
feeding wood.
Complete Instructions As Follows:
Using a #10 Flat Bastard Mill File, file with the knife
perpendicular to point, creating approximately 1/64”
flat edge. Then on the back side of the knife at
approximately 45°, file the edge back to a very small
chisel type point (See diagram below).
Bandit
PRINTED 4/02 PAGE 43
MODELS 65A & 65AW CHIPPER SECTION
Final File
Knife Back Filing
1/64”
Sharp Knife
First File
Back File
At 45°
Chisel
Point
GRIND FLAT TO THE
WIDTH OF A BALL
POINT PEN LINE.
DO NOT FILE BACK EDGE AS SHOWN.
THIS PICTURE IS FOR ILLUSTRATION ONLY.
KEEP BACK FILE EDGE VERY SMALL.