Stihl FS 88 Instruction Manual - Page 45

mmf7164

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~A =:JJ.......__4 __ 2 o m B ,---~-----a'i~ .:;.:,; ~c 3 Sharpen correctly • If slightly dull: Use flat file (4) 0814 212 3310In case of more serious wear or nicks: Resharpen with a grinder maintain a sharpening angle of 30° (A) on the cutting edge (1). • File back the cutting edge parallel to the lines (B) (see illustration). • Resharpen frequently, take away as little material as possible - two or three strokes of the file are usually enough. 44 Grass cutting blade 230-8 Never straighten or weld a bent or cracked cutting blade - it might shatter and cause serious or fatal injury. • Resharpen when the tips of the cutting edges (1) have worn down to about 1mm/3/64" (A). To avoid out-of-balance: • Resharpen the cutters (2) uniformly - do not alter the contour of the parent blade (3) in any way. • After resharpening about 5 times, have blade checked on STIHL balancer 5910 850 2600 and rebalanced as necessary. Measurements and angles for resharpening Leave clearance of 2mm/5/64" (B) between cutting edge and parent blade - R1 should be 2mm/5/64". Radius R2 is 2.5mmf7164" and is obtained automatically if you use the specified file and maintain a filing angle of 30° (C). Cutting edge (0) must be exactly in line with center of blade's mounting hole.

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~A
o
~c
m
B
~
,---~-----a'i
:;:;
..,
3
2
=:JJ
.......
__
4
__
Sharpen correctly
•
If
slightly dull:
Use flat file
(4)
0814 212
3310-
In
case of more serious wear or
nicks: Resharpen with a grinder -
maintain a sharpening angle of
30°
(A)
on the cutting edge
(1).
•
File back the cutting edge
parallel to the lines
(B)
(see
illustration).
•
Resharpen frequently, take
away as little material as
possible - two or three strokes
of
the file are usually enough.
44
Grass cutting blade 230-8
Never straighten
or
weld a bent or
cracked cutting blade -
it
might
shatter and cause serious
or
fatal injury.
•
Resharpen when the tips of the
cutting edges
(1)
have worn
down to about 1mm/3/64" (A).
To
avoid out-of-balance:
•
Resharpen the cutters
(2)
uniformly - do not alter the contour
of the parent blade
(3)
in any
way.
•
After resharpening about 5 times,
have blade checked on STIHL
balancer 5910 850 2600 and
rebalanced as necessary.
Measurements and angles for
resharpening
Leave clearance of 2mm/5/64"
(B)
between cutting edge and parent
blade
-
R1
should be 2mm/5/64".
Radius
R2
is
2.5mmf7164"
and
is
obtained automatically if you use the
specified file and maintain a filing angle
of 30° (C).
Cutting edge
(0)
must be exactly
in
line
with center of blade's mounting hole.