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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.
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