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1. Have the saw chain sharpened professionally at an authorised service centre or
sharpen the chain yourself by using a proper sharpening kit. Also observe the
sharpening instructions supplied with the sharpening kit.
2. The height difference between the tooth and the ridge is the cutting depth. When
sharpening the saw chain you have to consider the following points (Fig. 30):
- File angle
- Cutting angle
- File position
- Diameter of round file
- File depth
3. 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.
4. Use the chain file (not delivered), whose diameter is 1.1 times the cutting tooth
depth. Make sure 20% of the file diameter is above the cutter's top plate.
Note: A file guide is available from most reputable tool merchants and is
the easiest way to hold the file at the correct position.
5. File at an angle perpendicular to the bar and at an angle of 30° to the direction of
travel (Fig. 31).
34
Fig. 30
Fig. 31
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