42
To sharpen the chain, proceed as follows:
·Use protective gloves.
·Ensure the chain is correctly tensioned.
·Engage the chain brake to lock the chain on the bar.
Use a round file, with a diameter of 1.1 times the cutting
tooth depth. Make sure 20% of the file diameter is above the
cutters top plate.
A file guide is available from most reputable tool merchants
and is the easiest way to hold the file at the correct position.
File at an angle perpendicular to the bar, and at an angle of
25° to the direction of travel (Fig. 35).
File each tooth from the inside towards the outside only.
File one side of the chain first, then turn the saw around and
repeat the process.
Sharpen each tooth equally by using the same number of
strokes.
Fig. 34
Right-hand
cutter
Left-hand
cutter
Bumper tie
strap
Bumper drive link
Tie strap
Saw chain direction
