Hitachi CS 40Y Instruction Manual page 18

English
1. Blade sharpening:
The accessory round fi le should be held against the
chain blade so that one-fi fth of its diameter extends
above the top of the blade, as shown in Fig. 27.
Sharpen the blades by keeping the round fi le at a 30°
angle in relation to the guide bar, as shown in Fig. 28,
ensuring that the round fi le is held straight, as shown
in Fig. 29. Ensure that all saw blades are fi led at the
same angle, or the cutting effi ciency of the tool will be
impaired.
Appropriate angles for sharpening the blades
correctly are shown in Fig. 30.
Keep all cutters the same length.
1/5 of diameter of fi le
Fig. 27
Fig. 28
90°
Fig. 29
18
Round fi le
30°
Round fi le
Round fi le
Saw chain
Guide bar
30°
Keep all cutters the same length
Fig. 30
2. Adjustment of depth gauge:
To perform this work, please use the optional
accessory depth gauge jointer and a standard fl at fi le
obtainable in local markets. The dimension shown in
Fig. 31 is called the depth gauge.
The depth gauge dictates the amount of incision (cut-
in), and must be accurately maintained.
The optimum depth gauge for this tool is 0.025"
(0.635 mm). After repeated blade sharpening, the
depth gauge will be decreased. Accordingly, after
every, 3-4 sharpenings, place the depth gauge jointer
as shown in Fig. 32, and fi le away that portion that
protrudes above the upper plane of the depth gauge
jointer.
Depth gauge
Fig. 31
Depth gage jointer
File away this portion
Fig. 32
85°
0.025" (0.635 mm)
File
60°