21
Files and file guiding
-
Use a special round file (optional accessory) for saw chains sharpening. Normal
round files are not suitable.
-
Use the round file of diameter 4.0 mm.
-
The file should only engage the cutter part on the forward stroke. Lift the file off
the cutter part on the return stroke.
-
Sharpen the shortest cutter first. Then the length of this shortest cutter becomes
the standard for all other cutters on the saw chain.
-
Guide the file as shown in the figure.
-
A file holder (optional accessory) makes file guidance easier. The file holder has
markings for the correct sharpening angle of 30°. When using the file holder, align
the markings parallel to the saw chain, and limit the filing depth to 4/5 of the file
diameter.
- After sharpening the chain, check the depth of the cut using the chain gauge tool
(optional accessory).
-
Remove the small excess with a special flat file (optional accessory).
- Round off the front of the depth gauge.