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

6-2. Drilling Speed Comparisons

Drilling speed depends on the operating conditions. The test results shown in Fig. 1 is based on actual factory
tests, and is used as a reference only. Figure 1 shows the drilling speed comparisons for downward drilling.
The drill bits used are the Hitachi genuine SDS-plus shank bits.
900
800
700
600
500
400
300
200
100
0
6.5
8.5 10.5
Fig. 1 Drilling speed comparisons (downward drilling)
HITACHI DH 24DVA
C
P
HITACHI DH 24DV
16.5
12.5
14.5
Drill diameter (mm)
--- 12 ---
24
18 20