18
F
- 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
fi
le. If the proper
fi
le 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
fi
le holder with a saw chain round
fi
le:
-
086 (.325") chain: File the
fi
rst cutter half with a 4.8 mm dia.
round saw-chain
fi
le, then switch to a 4.5 mm dia.
fi
le.
- 093 (3/8") and 099 (3/8") chain: File the
fi
rst cutter half
with a 5.5 mm dia. round saw-chain
fi
le, then switch to a
4.8 mm dia.
fi
le.
Normal round
fi
les are not appropriate for this work. See
"Accessories" for the order number.
- The
fi
le should cut only when pushed forwards (arrow). Lift
the
fi
le 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
fi
le as in Fig. F shown (chain 086 (.325"),
099 (3/8") = 10° and 093 (3/8") = 90°).
E
Chain 086
(.325")
093
(3/8")
099
(3/8")
Sharpening angle
α
30°
35°
25°
Front rake
β
85°
85°
60°
Chain: 093 (3/8") 099 (3/8"), 086 (.325")
1
2
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
fl
at
fi
le (
1
). See "Accessories" for the order number.
- Round off the front of the depth limiter (
2
).
I
G
- The
fi
le holder makes
fi
le guidance easier. It is marked for
the correct
α
sharpening angle (keep the marks parallel with
the chain when
fi
ling, see illustration) and limits the cut depth
to the correct 4/5 of the
fi
le diameter. See "Accessories" for
the order number.
4/5
α
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.
J