Stihl HTE 60 Instruction Manual page 41

20 Maintaining and Sharpening the Saw Chain
vibration levels, produces unsatisfactory cutting
results and increases 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).
20.2 Chain Pitch
The chain pitch (a) is marked on the depth gauge
end of each cutter.
Mark (a)
7
Select file diameter according to chain pitch –
see table "Sharpening Tools".
You must observe certain angles when resharp‐
ening the chain cutter.
0458-247-9921-C
a
Chain Pitch
inch mm
1/4 P 6.35
20.3 Filing and Side Plate Angles
A
B
A Filing angle
STIHL saw chains are sharpened to a filing angle
of 30°. Exceptions are ripping chains with a filing
angle of 10°. Ripping chains have an X in their
designations.
B Side plate angle
The correct side plate angle is obtained automat‐
ically if you use the prescribed file holder and file
diameter.
Cutter shapes
Micro = semi chisel cutter, e.g.
63 PM3, 26 RM3, 71 PM3
The angles must be the same on all cutters. If
the angles are uneven: The chain will run
roughly, not in a straight line, wear quickly and
finally break.
20.4 File holder
► Use a file holder
A file holder (special accessory) must be used
for manual resharpening (see table "Sharpening
Tools" at the end of this chapter). The correct fil‐
ing angles are marked on the file holder.
Use only special saw chain sharpening files.
Other files have the wrong shape and cut.
English
Angle (°)
A B
30 75
41