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DHD3 Classic Hammer

 

DHD3

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.

 

DHD3 General Specifications:

 

AWDS logo
Standard
English
Metric
Standard drill pipe connection (see options)
2-3/8 API reg pin
Outside diameter (inch & mm)
3.1
79
Length w/o bit shoulder to shoulder (inch & mm)
35.5
902
Length with bit extended (inch & mm)
39.4
1,001
Length with bit retracted (inch & mm)
38.2
970
Weight w/o bit (lb & kg)
65
30
Backhead across flats (inch)
1-3/4 x 2-1/2 AF
Minimum bit size (inch & mm)
3.5
90
Maximum bit size (inch & mm)
3.9
100
Bore (inch & mm)
2.5
64
Piston weight (lb & kg)
12
5.5
Stroke (inch & mm)
4.0
102
Maximum pressure differential (psig & bar)
350
25
Maximum choke diameter (inch & mm)
0.35
8.9
Make-up torque (ft-lb. & N-m)
3,000
4,062
Shank style
DHD3.5

 

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Air Consumption:

 

 
DHD3
100 psi/6,9 bar (scfm & l/s)
111
52
blows per minute
1,347
150 psi/10,3 bar (scfm & l/s)
176
83
blows per minute
1,486
200 psi/13,8 bar (scfm & l/s)
248
117
blows per minute
1,625
250 psi/17,2 bar (scfm & l/s)
328
155
blows per minute
1,764
300 psi/20,7 bar (scfm & l/s)
414
195
blows per minute
1,904
350 psi/24,1 bar (scfm & l/s)
506
239
blows per minute
2,043
400 psi/27,6 bar (scfm & l/s)
606
286
blows per minute
2,182
435 psi/30,0 bar (scfm & l/s)
680
321
blows per minute
2,279
Above specifications/ratings are based on initial factory setting.

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