Instruction Manual

WARNING
Compliance with the angles and dimensions lis‐
ted below is absolutely necessary. An improperly
sharpened saw chain – especially depth gauges
that are too low – can lead to increased kickback
tendency of the chain saw – risk of injury!
26.2 Chain pitch
689BA027 KN
a
The chain pitch marking (a) is embossed in the
area of the depth gauge of each cutter.
Marking (a) Chain pitch
Inches 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
4 or 404 0.404 10.26
The diameter of file to be used depends on the
chain pitch – see table "Sharpening tools".
The angles of the cutter must be maintained dur‐
ing resharpening.
26.3 Sharpening and side plate
angles
A
B
689BA021 KN
A Sharpening angle
STIHL saw chains are sharpened with a 30°
sharpening angle. Ripping chains, which are
sharpened with a 10° sharpening angle, are
exceptions. Ripping chains have an X in the des‐
ignation.
B Side plate angle
The correct side plate angle results automatically
when the specified file holder and file diameter
are used.
Tooth shapes Angle (°)
A B
Micro = semi-chisel tooth, e. g.,
63 PM3, 26 RM3, 36 RM
30 75
Super = full chisel tooth, e. g.,
63 PS3, 26 RS, 36 RS3
30 60
Ripping chain, e. g., 63 PMX,
36 RMX
10 75
The angles must be identical for all cutters in the
saw chain. Varying angles: Rough, uneven run‐
ning of the saw chain, increased wear – even to
the point of saw chain breakage.
26.4 File holder
689BA025 KN
► Use a file holder
Always use a file holder (special accessory, see
table "Sharpening tools") when sharpening saw
chains by hand. File holders have markings for
the sharpening angle.
Use only special saw chain files! Other files are
unsuitable in terms of shape and type of cutting.
26.5 To check the angles
001BA203 KN
STIHL filing gauge (special accessory, see table
"Sharpening tools") – a universal tool for check‐
English
26 Maintaining and Sharpening the Saw Chain
32 0458-542-8321-D