Maintaining And Sharpening Saw Chain; Correctly Sharpened Chain - Stihl 9 Instruction Manual

Maintaining and Sharpening
Saw Chain

Correctly 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 and check your 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.
It is absolutely essential to comply
with the angles and dimensions
specified below. If the saw chain is
incorrectly sharpened – and in
particular if the depth gauge is set
too low – there is a risk of increased
kickback of the chainsaw, with
resulting risk of injury.
: Select sharpening tools according
to chain pitch.
See "Specifications" for permissible
chain pitches.
42
3
The chain pitch (e.g. / ") is marked on
8
the depth gauge end of each cutter.
Use only special saw chain
sharpening files. Other files have the
wrong shape and cut.
Select file diameter according to chain
pitch – see table "Sharpening Tools" at
the end of this chapter.
You must observe certain angles when
resharpening the chain cutter.
3/8
A = Filing angle
B = Side plate angle
Chain type
Rapid-Micro (RM)
Rapid-Super (RS)
Picco-Micro (PM/PMN)
Cutter shapes:
Micro = Semi-chisel
Super = Full chisel
The specified angles A and B are
obtained automatically if recommended
files or sharpening tools and correct
settings are used.
A
B
Angle (°)
A
30
30
30
B
85
60
85