DHD3 Classic Hammer
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 Specifications
General Specifications:
|
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
|
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.
|
