161
GB
Sharpening the saw chain
An incorrectly sharpened saw
chain increases the danger of
spring-back!
Use cut-protection gloves when
you are handling the chain or
the chain bar.
A sharp chain guarantees an op-
timal cutting performance. It eats
effortlessly through the wood and
leaves large, long wooden chips.
A saw chain is blunt if you have
to press the cutting equipment
through the wood and the wooden
chips are very small. In the case
of a very blunt saw chain, no chip
cuttings result at all, only sawdust.
• The sawing parts of the chain are
the cutting elements, which consist
of a cutting tooth and a depth limiting
projection. The vertical separation dis-
tance between these two determines
the sharpness depth.
• The following values must be noted in
sharpening the cutting teeth:
- Sharp edge angle (30°)
- Breast angle (85°)
- Sharpness depth (0.65 mm)
- Round file diameter (4.0 mm)
Deviations from the measure
-
ment data of the cutting geom
-
etry can lead to an increase of
the spring-back slope of the
machine. Increased danger of
accident!
Special tools are necessary for sharpen-
ing the chain, which guarantee that the
cutting edges are sharpened at the cor-
rect angle and to the correct depth. For
the inexperienced user of chainsaws,
we recommend to have the saw chain
sharpened by a specialist or a specialist
workshop. If you think yourself capable of
sharpening the chain, you can acquire the
special tools in the specialist trade.
1 .Remove the saw chain (re-
fer to the section on operating
the saw). The chain should be
well-tensioned to ensure proper
sharpening.
2. For the sharpening, a round file
with 4.0 mm diameter is neces-
sary.
Other diameters damage the
chain and can lead to danger
during work!
3. Sharpen only from the inside
to the outside. Guide the file
from the inner side of the cutting
teeth to the outer side. Lift the
file when you are withdrawing it.
4. Sharpen first the teeth on one
side. Turn the saw around and
sharpen the teeth of the other
side.
5. The chain is worn and must be
replaced by a new saw chain if
only approx. 4 mm of the cutting
teeth is remaining.
6. After the sharpening, all cutting
elements must now be equal in
length and width.
7. After every third sharpening, the
sharpness depth (depth limita-
tion) must be checked and the
height filed with the aid of a flat
file. The depth limitation should
be set back about 0.65 mm
from the cutting tooth. After the
setting back of depth limitation,
round it off a little at the front.
Содержание AKS 2440 Lion
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