Sharpening The Saw Chain - Grizzly Tools EC 1800-2 Originalbetriebsanleitung

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)
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
98
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. Switch the saw off and unplug it
from the mains.
2. Remove the saw chain (refer
to the section on operating
the saw). The chain should be
well-tensioned to ensure proper
sharpening.
3. For the sharpening, a round file
with 4.0 mm diameter is necessary.
Other diameters damage the
chain and can lead to danger
during work!
4. 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 with-
drawing it.
5. Sharpen first the teeth on one side.
Then flip over the chain saw and
sharpen the teeth on the other side.
6. 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.
7. After the sharpening, all cutting ele-
ments must now be equal in length
and width.
8. 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 cutting tooth. After
the setting back of depth limitation,
round it off a little at the front.