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GENERAL SAFETY PRECAUTIONS
English – 13
1153137-49 Rev.1 2009-12-29
Sharpening your chain and adjusting
depth gauge setting
General information on sharpening cutting teeth
• Never use a blunt chain. When the chain is blunt you
have to exert more pressure to force the bar through
the wood and the chips will be very small. If the chain
is very blunt it will produce wood powder and no chips
or shavings.
• A sharp chain eats its way through the wood and
produces long, thic
k chips or sha
vings.
• The cutting part of the chain is called the cutter and
consists of a cutting tooth (A) and the depth gauge
(B).
The cutters cutting depth is determined by the
difference in height between the two (depth gauge
setting).
When you sharpen a cutting tooth there are four important
factors to remember.
1 Filing angle
2 Cutting angle
3 File position
4 Round file diameter
It is very difficult to sharpen a chain correctly without the
right equipment.
We recommend that you use our file
gauge. This will help you obtain the maximum kickback
reduction and cutting performance from your chain.
See instructions under the heading Technical data for
infor
mation about sharpening your chain.
Sharpening cutting teeth
To sharpen cutting teeth you will need a round file and a
file gauge. See instructions under the heading Technical
data for information on the size of file and gauge that are
recommended for the chain fitted to your chain saw.
• Check that the chain is correctly tensioned. A slack
chain will mo
v
e sideways, making it more difficult to
sharpen correctly.
• Always file cutting teeth from the inside face. Reduce
the pressure on the retur
n strok
e. File all the teeth on
one side first, then turn the chain saw and file the teeth
on the other side.
• File all the teeth to the same length. When the length
of the cutting teeth is reduced to 5/32 inch (4 mm) the
chain is w
or
n out and should be replaced.
!
WARNING! Departure from the
sharpening instructions considerably
increases the risk of kickback.