Dust Collection Efficiency Comparison - Hitachi DH 24PD2 Technical Data And Service Manual

6-2. Dust Collection Efficiency Comparison

Dust collection efficiency varies considerably depending on the work conditions. Use the factory test
results shown in Fig. 1 for comparison purpose only.
Figure 1 shows a comparison of dust collection efficiency based on the drilling of 50 mm (2") holes into wall
material with a dia. 14.5 mm (9/16") drill bit.
HITACHI DH 24PD2
HITACHI DH 24PD
[Test conditions]
Direction
Pushing force
Test material
B
C
0 10
20 30
Dust collection efficiency (%)
: Drilling into wall
: 98 N (10 kgf)
: Concrete panel with a compression strength of 2,352 N/cm
40 70
50 60
Fig. 1
--- 12 ---
94%
87%
73%
87%
90 100
80
2 (240 kgf/cm 2 )