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6-2. Drilling Speed Comparisons
The data shown below were obtained in actual factory tests, and are for reference only. Actual drilling speeds
may vary in accordance with operating conditions, operator skill, etc.
Test condition:
Drill bit: Genuine parts
Workpiece material: Concrete (compressive strength 240 kg/cm
2
)
Drilling into concrete floor
Pressing force: 30 kgf
6
(1/4")
Drill diameter (mm)
18
(23/32")
22
(7/8")
20
(3/4")
16
(5/8")
14
(9/16")
12
(15/32")
10
(3/8")
8
(5/16")
0
0
400
(15-3/4")
1200
(47-1/4")
600
(23-5/8")
800
(31-1/2")
1000
(39-3/8")
200
(7-7/8")
Dr
illing speed (mm/min)
HITACHI FDV 20VB
B
C1/C2
HITACHI FDV 20VA
Drilling in concrete
Summary of Contents for FDV 20VB
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