Drilling Speed Comparisons - Hitachi DH 50MB Technical Data And Service Manual

6-2. Drilling Speed Comparisons

Drilling speed varies considerably depending on the work conditions. Use the factory test results shown in Fig. 4
as a reference, for comparison purposes only.
Drill bit dia.
Maker
(mm)
HITACHI DH 50MB
φ 16
B
D
HITACHI DH 50MB
φ 19
B
D
HITACHI DH 50MB
φ 22
B
D
HITACHI DH 50MB
φ 25
B
D
HITACHI DH 50MB
φ 28
B
D
HITACHI DH 50MB
φ 32
B
D
HITACHI DH 50MB
φ 38
B
D
HITACHI
DH 50MB
φ 40
B
D
*: Note that the data marked with asterisks are test results using drill bits which are beyond the tool's rated capacity. Use the
above data as a reference, for comparison purposes only.
[Test conditions]
Orientation : Downward drilling
Pressing force : 10 kgf
Test material : Concrete panel with a compression strength of 240 kgf/cm
Drill bit size : SDS-max shank drill bit
Model
0 100
B
D
B
D
B
D
B
D
B
D
B
D
B
D 75 *
B
60 *
D
Fig. 4
Drilling speed (mm/min.)
200
250
225
225
240
190
190
160
130
120
110
110
90
90
--- 11 ---
300 400
380
340
430
320
290
370
275
290
2
500
480