Operator`s manual

64
Square-Ground Filing
WHO SHOULD PERFORM SQUARE
GROUND FILING?
Most chainsaw users will probably never need to use
square ground chain, nor learn to perform square-
ground filing. But in areas where the timber is larger
and the guide bars used are longer, the performance
advantages of square-ground chain can outweigh the
fact that square-ground filing is more difficult and much
less forgiving of filing errors.
FILE POSITIONING
The file will sharpen the top plate, and the side plate,
simultaneously. This creates a line, (A), where the top-
plate cutting angle meets the side-plate angle. For best
results, file so that the line joins the cutting corner (B).
CORRECTLY INCORRECT INCORRECT
FILED CORNER TOO HIGH TOO LOW
To properly sharpen the cutter, use the correct filing posi-
tion, as shown here from three different points of view:
SIDE VIEW
END VIEWTOP VIEW
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