20˚
4. Too little top-plate filing angle.
Cause: Filed or ground at less than the
recommended angle.
Symptoms: Slow cutting. Requires extra effort
to cut. Possible binding in cut.
Remedy: Resharpen cutters while holding the
file at the correct top-plate filing angle for the
saw chain. Be sure the file guide is stamped
with the saw chain’s correct top-plate angle.
5. Too much top-plate cutting angle.
Cause: File held too low or file is too small.
Grinders: Saw chain ground at the wrong top-
plate cutting angle or using an incorrectly-sized
grinding wheel.
Symptom: Poor stay-sharp. Rapid dulling.
Cuts fast for a short time, then dulls.
Remedy: Resharpen cutters with the correct file
in the right size, held in the correct position. Use
correct file guide.
6. Too little top-plate cutting angle.
Cause:
File held too high or file is too large.
Grinders: Saw chain ground at the wrong top
plate cutting angle or an incorrectly sized grinding
wheel.
Symptoms:
Slow cutting. Premature wear to saw
chain and guide bar rails.
Remedy: Resharpen cutters using the correct
file guide that is the right size and in the correct
position.
7. Too much hook in the side plate.
Cause: File held too low or the file is too small.
Grinders: Saw chain ground at the wrong top-
plate cutting angle, grinding wheel is too small
or is grinding too deep into the body of cutter.
Symptoms: Rough cutting. Saw chain grabs.
Cutters dull quickly or won’t hold cutting edge.
Top plate breakage and/or saw chain stretch.
Remedy: Resharpen cutters using the correct
file in the right size held in the correct position.
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