WARNING: A dull or improperly sharpened chain can cause excessive motor
speed during cutting, which may result in severe motor damage.
WARNING: Improper chain sharpening increases the potential of kickback.
WARNING: Failure to replace or repair a damaged chain can cause serious
injury.
Top Plate Sharpening Angles
(Fig. 15)
◾
CORRECT 30°- This optimal angle can
be obtained only when the specified
files and proper setting are used. File
holders are marked with guide marks
to align the file properly to produce
the correct top plate angle.
◾
LESS THAN 30°- The tooth is too dull
for cutting.
◾
MORE THAN 30°- The edge of the cutting tooth is feathered and dulls quickly.
Side Plate Angle (Fig. 16)
◾
CORRECT 65° - The optimal angle
can be produced automatically if the
correct diameter file is used in the file
holder.
◾
HOOK - “Grabs” and dulls quickly.
Increases potential of KICKBACK.
Results from using a file with a
diameter that is too small, or a file
held too low.
◾
BACKWARD SLOPE - Needs too much feed pressure, causes excessive wear to bar
and chain. Results from using a file with a diameter too large, or a file held too high.
30°
15
CORRECT INCORRECT
LESS THAN 30° MORE THAN 30°
INCORRECT
Top Plate Sharpening Angles
65°
16
CORRECT INCORRECT
Hook
Backward Slope
INCORRECT
Side Plate Angle
56-VOLT LITHIUM-ION COMMERICAL POLE SAW — PSX2510/PSX2510-FC 35