Stihl MS 441 C-M Notice D'emploi page 37

Maintaining and
Sharpening the Saw Chain
Sawing effortlessly with a properly
sharpened saw chain
A properly sharpened saw chain cuts
through wood effortlessly even with very
little pushing.
Never use a dull or damaged saw chain
– this leads to increased physical strain,
increased vibration load, unsatisfactory
cutting results and increased wear.
N Clean the saw chain
N
Check the saw chain for cracks and
damaged rivets.
N
Replace damaged or worn chain
components and adapt these parts
to the remaining parts in terms of
shape and level of wear – rework
accordingly.
Carbide-tipped (Duro) saw chains are
especially wear-resistant. For an optimal
sharpening result, STIHL recommends
STIHL servicing dealers.
Compliance with the angles and
dimensions listed 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!
MS 441 C-M
The chain pitch marking (a) is embossed
in the area of the depth gauge of each
cutter.
Marking (a) Chain pitch
Inches
1/4 or 1 1/4
P, PM or 6 3/8 P
325 or 2 0.325
3/8 or 3 3/8
404 or 4 0.404
Use only special saw chain files!
Other files are unsuitable in terms of
shape and type of cutting.
The diameter of file to be used depends
on the chain pitch – see table
"Sharpening tools"
The angles of the cutter must be
maintained during resharpening.
A
B
A Sharpening angle
B Side plate angle
Chain Type
Rapid Micro (RM)
a
Rapid Super (RS)
Picco Micro (PM)
Rapid Micro X (RMX, rip-
ping chain)
Picco Micro X (PMX, rip-
ping chain)
Tooth shapes
Micro = semi-chisel tooth
Super = chisel tooth
mm
When the specified files and/or
6.35
sharpening tools and the proper setting
9.32
are used, the specified values for angles
8.25 A and B will be attained automatically.
9.32
The angles must be identical for all
10.26 cutters in the saw chain. Varying angles:
Rough, uneven running of the saw
chain, increased wear – even to the
point of saw chain breakage.
Because these requirements can be met
only after sufficient, constant practice:
N 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.
English
Angle (°)
A B
30 75
30 60
30 75
10 75
10 75
35