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25
F
Cleaning the guide bar
CAUTION:
Protective gloves must be worn.
Regularly inspect the bearing surfaces of the guide bar for
damage, and clean them with a suitable tool.
- The sharpening angle α must be identical for all cutters!
Different angles result in a roughly, irregularly running
chain, increase wear and tear and cause chain beakage.
- The front rake β 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.
J
E
Chain 085 (.325") 094, 102 (3/8")
Sharpening angle α 25° 30°
Front rake β 60° 85°
H
- After having sharpened the chain, the height of the depth
limiter must be checked by means of a chain gauge. See
"Accessories" for the order number.
- Correct even the smallest excess height with a special flat
file (H). See "Accessories" for the order number.
- Round off the front of the depth limiter (I).
I
G
- The file holder makes file guidance easier. It is marked for
the correct α sharpening angle (keep the marks parallel
with the chain when filing, see illustration) and limits the cut
depth to the correct 4/5 of the file diameter. See "Accesso-
ries" for the order number.
4/5
α
Files and how to work with them
- Sharpen using a special file holder with a saw chain round file:
- 085 (.325") chain: File the first cutter half with a 4.5 mm dia.
round saw-chain file, then switch to a 4 mm dia. file.
- 094, 102 (3/8") chain: Round saw-chain file 4.8 mm diam-
eter.
Normal round files are not appropriate for this work. See
"Accessories" for the order number.
- 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 as in Fig. F shown.
STOP