Stihl 056 Instruction Manual - Page 34

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Top: Filing angle Center: 1-3 = Side plate angle 4 = Top plate cutting angle Bottom: Table of file diameters Rapid- Standard Rapid-Micro Rapid-Super Topic-Super ~ o 0 1 0 0 . 3 Rapid-Super~ ~ Topic-Super I

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Top:
Filing angle
Center:
1-3
=
Side plate angle
4
=
Top
plate cutting angle
Bottom: Table of file diameters
Rapid- Standard
Rapid-Micro
~
o
0
1
0
0
.
3
Rapid-Super~
Topic-Super
I
<90.
~
Rapid-Super
Topic-Super
2 Rapid-
I
............
'O~
~
It is essential to insure that the filing angle is kept exactly
the same
on
all cutters. Irregular angles will cause the
chain to run roughly and unevenly
as
well
as
increase the
rate of wear and result
in
chain breakage. When sharpen-
ing by hand
always file from the inside to the outside of
the cutting edge.
Side plate angle
The upright cutting edge just below the top plate
is
known
as
the side plate cutting edge. The side plate angle
is,
therefore, the angle between the side plate cutting edge
and the horizontal line formed by the cutter toe and heel.
The specified side plate angles are 90
0
for Rapid-Standard,
85
0
for Rapid-Micro and 80
0
for Rapid-Super and Topic-
Super chain. These angles are obtained automatically if a
file holder is used with the correct file and the file is held
correctly during sharpening.
Top plate cutting angle
The top plate cutting angle is 60° on all chains. It is also
obtained automatically when the chain is sharpened care-
fully with a file holder or another STIHL sharpening tool.
32
Chain pitch
Filedia.
File
No.
.325"
(8.25 mm)
4.8mm
0811411 8088
3/
8"
(9.32
mm)-
5.5mm
08114118108
3/
8"
(Topic)
4.5mm
6814 242 3396
.404"
(10.26 mm)*
5.5mm
08114118108
112"
(12.7
mm)
6.3mm
0811
411'
8118
-The 4.8 mm dia. round file must be used when the top
plate has been filed back half-way.
Sharpening
Only special saw chain files may be
'Used
for sharpening
and they must match the chain pitch. The shape and cut of
machinists' files makes them unsuitable for saw chain. The
special chain file should be used with a file holder or a filing
tool.
All cutters must be filed to the same length.
As
the top plate
slopes downward to the rear (clearance angle) the cutter