Maintaining And Sharpening The Saw Chain - Stihl HTA 65 Instruction Manual

English
Maintaining and Sharpening
the Saw Chain
Cutting effortlessly with a correctly
sharpened chain
A properly sharpened chain slices
through wood effortlessly and requires
very little feed pressure.
Working with a dull or damaged chain
requires more physical effort, exposes
the user to higher vibration levels,
produces unsatisfactory cutting results
and increases wear.
Move the retaining latch to ƒ.
N
Remove the battery.
N
Clean the chain.
N
Check the chain for cracks in the
N
links and damaged rivets.
If such cracks or damage are found,
N
remove the chain and replace any
worn parts of the chain. Match the
new parts to the shape and size of
the original parts.
WARNING
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 an
increased risk of kickback, with resulting
risk of loss of control and injury.
64
Chain pitch
The chain pitch (a) is marked on the
depth gauge end of each cutter.
Mark (a) Chain pitch
inch
7 1/4 P
Select file diameter according to chain
pitch – see table "Sharpening Tools".
You must observe certain angles when
resharpening the chain cutter.
Filing and side plate angles
A
B
A Filing angle
B Side plate angle
Chain type
Picco Micro (PM)
Cutter shapes
Micro = Semi-chisel
The specified angles A and B are
obtained automatically if the
recommended files or sharpening tools
and correct settings are used.
a
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.
File holder
mm
6.35
Always use the proper tools. Sufficient
and constant practice will make
sharpening easier.
Use a file holder
N
A file holder (special accessory) must be
used for manual resharpening (see table
"Sharpening Tools" at the end of this
chapter). The correct filing angles are
marked on the file holder.
Use only special saw chain sharpening
files. Other files have the wrong shape
and cut.
Angle (°)
A B
30 75
HTA 65, HTA 85