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- The cut is not straight.
- Vibration increase.
- Fuel consumption has increased.
Sharpen the saw chain frequently, but remove only a little material each time.
Two or three strokes with a file are usually sufficient for routine resharpening. When the saw chain
has been resharpened several times, have it sharpened in a specialist repair shop.
2) File and file guiding
- Use a special round file for saw chains, with a diameter of 4 mm, to sharpen the chain. Normal
round files are not suitable.
- The file should only engage the material on the forward stroke. Lift the file off the material on the
return stroke.
- Sharpen the shortest cutter first. The length of this cutter is then the gauge dimension for all other
cutters on the saw chain.
- Guide the file as shown in the figure.
- The file can be guided more easily if a file holder (accessory) is employed. The file holder has
markings for the correct sharpening angle of 30° (align the markings parallel to the saw chain)
and limits the depth of penetration (to 4/5 of the file diameter).
Guide the file as shown in the figure.
- After sharpening the chain, check the height of the depth gauge using the chain gauge tool
(optional accessory).
- Remove any projecting material, however small, with a special flat file (optional accessory).
- Round off the front of the depth gauge again.
- Wash away dust and particles from saw chain after adjusting the height of depth gauge.
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