Selling Point Descriptions - Hitachi C 7YA Technical And Service Manual

4-1. Selling Point Descriptions

(1) Excellent dust collection and cutting efficiencies
(4T diamond tip blade adopted)
The Model C 7YA is equipped with a gear cover,
a saw cover and a slide cover to collect dust of
fiber cement boards or to control the discharging
direction of dust. Since dust is discharged through
a guide groove composed of the above three covers
(shown in the right figure) toward the outlet at a high
speed, scattering of dust is minimized and the dust
bag can collect dust efficiently.
In addition, the Model C 7YA is equipped with a 4T diamond tip blade that is specifically designed for cutting
fiber cement boards (HARDI PLANK, HARDI PANEL, etc.). The 4T diamond tip blade cuts fiber cement
boards well without decreasing the peripheral speed, and particles of dust are relatively larger. Thus, the
Model C 7YA provides excellent dust collection efficiency. C is equipped with a 28T TCT blade and provides
less cutting and dust collection efficiencies than those of the Model C 7YA. The table and figure below show a
comparison between the Model C 7YA and C concerning the dust collection and cutting efficiencies.
Comparison in dust collection rate
Item
Model
C 7YA
C
Unmeasurable (*2)
(*1) When the slide cover is fully opened: 80%
(*2) Cutting efficiency for 4 thicknesses of HARDI PLANK is unmeasurable because the saw blade
becomes dull.
(Note) The dust collection rates vary depending on the cutting conditions. Use these factory test results
as a reference, comparison purposes only.
Comparison in cutting efficiency
ft/min.
m/min.
14
45.9
12
39.4
10
30.3
26.2
19.7
13.1
6.6
0
4 thicknesses
85% (*1)
8
6
4
2
0
2
(4.4)
Cutting conditions
3 thicknesses
Material: HARDI PLANK
(Thickness: 5/16", Width: 12")
81%
Cutting length: 5 m
47%
Material: HARDI PLANK (Thickness: 5/16", Width: 12")
C 7YA (Thickness: 4)
3
(6.6)
Thrust
--- 2 ---
C 7YA (Thickness: 1)
C (Thickness: 1)
4 kgf
(8.8)
lbs.
Guide groove
Dust