Drilling Speed Comparison - Hitachi DH 24PB3 Technical Data And Service Manual

6-2. Drilling Speed Comparison

Drilling speed varies considerably depending on the work conditions. Use the factory test results shown in Fig. 1
for comparison purpose only.
800.0
700.0
600.0
500.0
400.0
300.0
200.0
100.0
0.0
6
[Test conditions]
Direction
Pushing force
Test material
8 10 12
: Downward drilling
: 98 N (10 kgf)
: Concrete panel with a compression strength of 2,352 N/cm
HITACHI DH 24PB3
HITACHI DH 24PB2
14 16
Drill bit dia. (mm)
Fig. 1
--- 11 ---
B
C
18 20 22
2 (240 kgf/cm
24
2 )