Hitachi DH 20PB, Технические данные и руководство по обслуживанию

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6. COMPARISONS WITH SIMILAR PRODUCTS
6-1. Specification Comparisons
Maker
Model
Capacity
Concrete
Steel
Wood
mm
mm
mm
W
/min.
/min.
/min.
dB(A)
Input
No-load rotation speed
Full-load rotation speed
Full-load blow
No-load sound
pressure level
Reversing switch
Variable speed
Safety-release clutch
Bit drive system
Dimensions
Weight
Length
Height
Width
mm
mm
mm
kg
Hitachi
DH 20PB DH 24PB
B
20 (13/16")
13 (1/2")
32 (1-1/4")
24 (15/16")
13 (1/2")
32 (1-1/4")
20 (13/16")
10 (3/8")
30 (1-3/16")
520 620 500
0 --- 1,000 0 --- 1,050 0 --- 1,100
0 --- 750 0 --- 800 0 --- 850
0 --- 4,200 0 --- 4,400 0 --- 3,900
90 90 88
SDS-plus shank SDS-plus shank SDS-plus shank
318 (12-17/32") 318 (12-17/32")
334 (13-5/32")
360 (14-3/16")
185 (7-9/32") 185 (7-9/32") 205 (8-1/16")
72 (2-27/32") 72 (2-27/32") 79 (3-1/8")
2.3 (5.1 Ibs.) 2.3 (5.1 Ibs.) 2.3 (5.1 Ibs.)
6-2. Drilling Speed Comparisons
Drilling speed depends on the operating conditions. The test results shown in Fig. 1 are based on actual factory
tests, and are used as a reference only. Fig. 1 shows the drilling speed comparisons for downward drilling.
The drill bits used are the Hitachi genuine SDS-plus shank bits.
Fig. 1 Drilling speed comparisons (downward drilling)
Hitachi DH 24PB
Drilling speed (mm/min)
Drill bit dia. (mm)
Pressing force: 10 kgf
Test material : Concrete panel with
a compression strength
of 240 kgf/cm
2
Hitachi DH 20PB
B
8 20 12 10 14 18 16
100
500
400
300
200
1000
700
800
900
600
0
Note 1) Mark " "
• • •
Equipped
2) Weight excludes cord and side handle.