Sharpening The Saw Chain - Parkside PKSA 20-Li B2 Originalbetriebsanleitung

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Sharpening the saw chain

An incorrectly sharpened
saw chain increases the dan-
ger 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 cut-
ting tooth and a depth limiting projec-
tion. The vertical separation distance
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°)
- Apex angle (60°)
- Sharpness depth (0.65 mm)
- Round file diameter (4.0 mm)
Deviations from the meas-
urement data of the cutting
geometry can lead to an
increase of the spring-back
slope of the machine. In-
creased danger of accident!
Special tools are necessary for sharpening
the chain, which guarantee that the cutting
52
edges are sharpened at the correct angle
and to the correct depth. For the inexperi-
enced user of chainsaws, we recommend
to have the saw chain sharpened by a spe-
cialist or a specialist workshop. If you think
yourself capable of sharpening the chain,
you can acquire the special tools in the spe-
cialist trade.
1. Remove the saw chain (refer 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 re-
placed 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 limitation)
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 cut-
ting tooth. After the setting back of
depth limitation, round it off a little
at the front.