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DHD4 Classic Hammer

 

DHD4

Atlas Copco Rock Drilling Tools -
Secoroc Down the Hole Equipment

 

Time-Tested Design

 

Our DHD Classic product line is available for drilling contractors, owner-operators, and large corporations who are specifically looking for the lowest priced drill. This time-tested design is practically bullet proof -- it has been in continuous, successful use in the industry for over 30 years.


DHD4 General Specifications:

AWDS logo
Standard
Deep Hole
English
Metric
English
Metric
Standard drill pipe connection (see options)
2-3/8 API reg pin
2-3/8 API reg pin
Outside diameter (inch & mm)
3.6
92
3.6
92
Length w/o bit shoulder to shoulder (inch & mm)
41.3
1,049
41.3
1,049
Length with bit extended (inch & mm)
45.6
1,158
45.6
1,158
Length with bit retracted (inch & mm)
44.5
1,130
44.5
1,130
Weight w/o bit (lb & kg)
85
39
80
36
Backhead across flats (inch)
1-3/4 x 2-1/2 AF
1-3/4 x 2-1/2 AF
Minimum bit size (inch & mm)
4.1
105
4.1
105
Maximum bit size (inch & mm)
5.0
127
5.0
127
Bore (inch & mm)
2.9
75
2.9
75
Piston weight (lb & kg)
17.1
8
17.1
8
Stroke (inch & mm)
4.0
102
4.0
102
Maximum pressure differential (psig & bar)
350
25
350
25
Maximum choke diameter (inch & mm)
0.35
8.9
0.35
8.9
Make-up torque (ft-lb. & N-m)
4,000
5,416
4,000
5,416
Shank style
DHD340
DHD340

 

Request info

 

Air Consumption:

 

 
Standard
Deep Hole
100 psi/6,9 bar (scfm & l/s)
125
59
178
84
blows per minute
1,145
1,136
150 psi/10,3 bar (scfm & l/s)
199
94
286
135
blows per minute
1,335
1,382
200 psi/13,8 bar (scfm & l/s)
286
135
402
190
blows per minute
1,505
1,589
250 psi/17,2 bar (scfm & l/s)
384
181
524
247
blows per minute
1,656
1,757
300 psi/20,7 bar (scfm & l/s)
495
233
654
308
blows per minute
1,787
1,886
350 psi/24,1 bar (scfm & l/s)
618
292
791
373
blows per minute
1,898
1,975
400 psi/27,6 bar (scfm & l/s)
753
355
936
442
blows per minute
1,990
2,025
435 psi/30,0 bar (scfm & l/s)
855
403
1,041
491
blows per minute
2,043
2,037
Above specifications/ratings are based on initial factory setting.