All cutters must be sharpened to the same angle, 30°. Different angles result in a roughly, irregularly running chain, increase wear and tear and cause chain beakage.
The 85° front rake of the cutter results from the cut depth of the round file. If the proper file is used in the right manner, the correct front rake will be obtained automatically.
Files and how to work with them
Sharpen using a special file holder with a saw chain round file dia. 5/32" (4.0 mm). Normal round files are not appropriate for this work. Accessorie, not delivered with the chain saw.
The file should cut only when pushed forwards (arrow). Lift the file when leading it backwards.
First sharpen the shortest cutter. The length of this cutter is then the standerd for all other cutters of the chain.
Always guide the file horizontally (90° to the guide bar).
D
E
The file holder makes file guidance easier. It is marked for the |
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correct 30° sharpening angle (keep the marks parallel with the | 4/5 | |||||||||||||||||||||||
chain when filing, see illustration) and limits the cut depth to the | ||||||||||||||||||||||||
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correct 4/5 of the file diameter. Accessorie, not delivered with |
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the chain saw. | 30° |
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F
After having sharpened the chain, the height of the depth limiter must be checked by means of a chain gauge. Accessorie, not delivered with the chain saw.
Correct even the smallest excess height with a special flat file (12). Accessorie, not delivered with the chain saw.
Round off the front of the depth limiter (13).
12
13
G
27
