Drilling Speed Comparisons - Hitachi DH 24DV Technical Data And Service Manual

6-2. Drilling Speed Comparisons

Drilling speed depends on the operating conditions. The test results shown in Fig. 3 is based on actual factory
tests, and is used as a reference only. Figure 3 shows the drilling speed comparisons for downward drilling.
The drill bits used are the Hitachi genuine SDS-plus shank bits.
1000
900
800
700
600
500
400
300
200
100
0
4.8
6.5
8.5 10.5
Fig. 3 Drilling speed comparisons (downward drilling)
Pressing force: 10 kg
Test material: Concrete panel with
a compression strength of 240 kg/cm
HITACHI DH 24DV
B
P
C
Q
HITACHI DH 20DV
16.5
12.5
14.5
Drill diameter (mm)
--- 13 ---
2
24
18 20