English
markings on the file holder – rest the file holder on the tooth head and the depth gauge
NFile only from the inside outward
NThe file only sharpens on the forward stroke – lift the file on the backstroke
NDo not file tie straps and drive links
NRotate the file a little periodically in order to avoid uneven wear
NTo remove file burr, use a piece of hardwood
NCheck angle with file gauge All cutters must be equally long.
With varying cutter lengths, the cutter heights also vary and cause rough running of the saw chain and chain breakage.
NAll cutters must be filed down equal to the length of the shortest cutter – ideally, one should have this done by a servicing dealer using an electric sharpener
Depth gauge setting
a |
689BA023 KN |
The depth gauge determines the depth to which the cutter penetrates the wood and thus the chip thickness.
aRequired distance between depth gauge and cutting edge
When cutting softwood outside of the frost season, the distance can be increased by up to 0.2 mm (0.008").
Chain pitch | Depth gauge |
Distance (a)
Inches (mm) mm (Inches)
1/4 P | (6.35) | 0.45 | (0.018) |
1/4 | (6.35) | 0.65 | (0.026) |
3/8 P | (9.32) | 0.65 | (0.026) |
0.325 | (8.25) | 0.65 | (0.026) |
3/8 | (9.32) | 0.65 | (0.026) |
0.404 | (10.26) | 0.80 | (0.031) |
Lowering the depth gauges
The depth gauge setting is lowered when the cutter is sharpened.
NCheck the depth gauge setting after each sharpening
1 | 2 |
KN | |
| 689BA061 |
NLay the appropriate file gauge (1) for the chain pitch on the saw chain and press it against the cutter to be checked – if the depth gauge protrudes past the file gauge, the depth gauge must be reworked
Saw chains with humped drive link (2) – upper part of the humped drive link (2) (with service mark) is lowered at the same time as the depth gauge of the cutter.
WARNING
The rest of the humped drive link must not be filed; otherwise, this could increase the tendency of the chain saw to kick back.
689BA051 KN |
NRework the depth gauge so that it is flush with the file gauge
689BA044 KN |
NAfterwards, dress the leading edge of the depth gauge parallel to the service mark (see arrow) – when doing this, be careful not to further lower the highest point of the depth gauge
48 | MS 250 |
