POWXG10220 EN
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to rapid bar wear. To help minimize bar wear, the following guide bar maintenance procedures
are recommended.
Warning: always wear protective gloves during maintenance operations. Do
not carry out maintenance when the engine is hot.
12.4 Chain sharpening
Chain sharpening requires special tools to ensure that cutters are sharpened at the correct angle
and depth. For the inexperienced chain saw user, we recommend that the saw chain be
professionally sharpened by the nearest professional service center. For non-experienced users
of the chain saw, we recommend to have the chain sharpened by a specialist in any authorized
service.
Warning: when having wrong sharpened chain, there may occur a higher
danger of kickback.
▪ To sharpen the saw chain, use the suitable sharpening tools:
round chain file
file leading
chain measuring calibre.
These tools can be bought in any specialized stores.
▪ To gain well shaped sawdust particles, use sharp chain. If there appears wooden powder,
you must sharpen the saw chain.
Warning: all cutting teeth must be similarly long. Different length of the teeth
can cause rough run of the chain or its rupture, as well.
▪ Minimum length of the teeth must be 4 mm. If they are shorter, remove the saw chain.
▪ Angles, which the teeth are under, must be followed.
▪ To sharpen the chain basically, make 2 to 3 pulls of the file from the inside out.
Warning: after 3 to 4 of your sharpening of the cutting teeth, have the saw
chain sharpened in any authorised service. They will sharpen the depth
limiter as well, which provides the distance.
Chain sharpening
The pitch of the chain (Fig. 21) depends on the model.
Sharpen the chain using protective gloves and a round file of ø5/32” (4 mm).
Always sharpen the cutters only with outward strokes (Fig. 22) observing the values given in
Fig. 21. After sharpening, the cutting links must all have the same width and length.
Warning: a sharp chain produces well-defined chips. When your chain starts
to produce sawdust, it is time to sharpen.
