0000097198_001
The chain sprocket is driven via a friction clutch.
Have the chain sprocket replaced by an author‐
ized dealer.
STIHL recommends that maintenance and repair
work be carried out only by authorized STIHL
dealers.
21 Maintaining and Sharpen‐
ing the Saw Chain
21.1
Cutting effortlessly with a cor‐
rectly sharpened chain
A properly sharpened chain slices through wood
effortlessly and requires very little feed pressure.
Do not work with a dull or damaged chain as it
will increase the physical effort required, produce
unsatisfactory results and a higher rate of wear.
► Clean the chain.
► Check the chain for cracks in the links and
damaged rivets.
► Replace any damaged or worn parts of the
chain and match the new parts to the shape
and size of the original parts.
Carbide-tipped saw chains (Duro) are particularly
wear resistant. STIHL recommends you have
your chain resharpened by a STIHL servicing
dealer.
WARNING
It is absolutely essential to comply with the
angles and dimensions specified below. If the
saw chain is incorrectly sharpened – and in par‐
ticular if the depth gauge is set too low – there is
an increased risk of kickback, with resulting risk
of injury.
The saw chain cannot be locked in place on the
guide bar. Therefore, it is best to remove the
chain from the bar and resharpen it on a work‐
shop sharpening tool (FG 2, HOS, USG).
21.2
Chain pitch
689BA027 KN
a
The chain pitch (a) is marked on the depth gauge
end of each cutter.
Mark (a)
Chain pitch
inch
mm
7
1/4 P
6,35
1 or 1/4
1/4
6,35
6, P or PM
3/8 P
9,32
2 or 325
0.325
8,25
3 or 3/8
3/8
9,32
Select file diameter according to chain pitch –
see table “Sharpening Tools”.
You must observe certain angles when resharp‐
ening the chain cutter.
21.3
Filing and side plate angles
A
B
689BA021 KN
A Filing angle
21 Maintaining and Sharpening the Saw Chain
English
0458-473-0121-E
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