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18
ENGLISH
A
B
C
D
E
F
Sharpening
Never cut with a dull chain. A chain which does not cut unless
you bear down hard is damaged, dull or incorrectly filed.
To file the chain correctly, you need: round file (A), file gauge
(B), flat file (C) and depth gauge tool (D). Best results are
obtained by using the correct file size (see table) and a file
gauge with a marked filing angle.
NOTE! Check that the drive link does not show excessive play in
the bar groove. This may affect the sharpening operation. Note
that for some chains, the file is held level, while for others the file
is held with the handle low at the angle indicated (E).
Always file from the inside of the teeth and out (F). After filing
one side, turn the saw and file the other side. To insure that the
saw cuts straight, all teeth should be filed to the same length
min. 0.15" (4mm). If the chain is sharpened regularly, only a
few strokes of the file are needed on each tooth.
To achieve maximum performance, each chain has a specific
cutting angle, file size and depth.
WARNING!
Filing too deep or using a file which is too small will make a chain
dangerously aggressive. This means that the chain’s tendency to
kick back increases and the chain becomes dangerous to use.
Depth gauge
To ensure the best performance and longest service life of the
chain, always keep the depth gauge at the prescribed length
( 0.025" / 0.65 mm ).
Depth gauges are checked using a depth gauge tool
(for specification, see table).
NOTE! The chain should be sharpened before depth gauges are
checked. Adjustment of the depth gauge is done with a flat file.
Round off the corner of the depth gauge afterwards.
STOP
WARNING!
An excessively low depth gauge makes the chain dangerously
aggressive. This means that the chain’s tendency to kick back
increases and the chain becomes more dangerous to use.
STOP
1
5
L
Bar / chain combinations approved for reduced kickback
inch
inch/mm
inch/mm
°
°
°
91VG 3/8"
0.050/1.3
5/32"/4.0 85°
30°
0°
inch/mm
inch/mm/dl
0.025/0.65
12/30/48/35/52
16/40/56
min 0.15
"
min 4 mm
.025 " / 0.65 mm
Chain Maintenance