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DHD12 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.
DHD12 General Specifications:
|
Standard |
Deep Hole |
English |
Metric |
English |
Metric |
Standard drill pipe connection (see options) |
6-5/8 API reg pin |
6-5/8 API reg pin |
Outside diameter (inch & mm) |
10.88 |
276 |
10.88 |
276 |
Length w/o bit shoulder to shoulder (inch & mm) |
71.3 |
1,811 |
71.3 |
1,811 |
Length with bit extended (inch & mm) |
80.6 |
2,047 |
80.6 |
2,047 |
Length with bit retracted (inch & mm) |
78.6 |
1,996 |
78.6 |
1,996 |
Weight w/o bit (lb & kg) |
1,318 |
599 |
1,286 |
585 |
Backhead across flats (inch) |
4 x 1-5/16 AF |
4 x 1-5/16 AF |
Minimum bit size (inch & mm) |
11.9 |
302 |
11.9 |
302 |
Maximum bit size (inch & mm) |
18.5 |
470 |
18.5 |
470 |
Bore (inch & mm) |
8.5 |
216 |
8.5 |
216 |
Piston weight (lb & kg) |
250 |
114 |
250 |
114 |
Stroke (inch & mm) |
4.0 |
102 |
4.0 |
102 |
Maximum pressure differential (psig & bar) |
250 |
17 |
250 |
17 |
Maximum choke diameter (inch & mm) |
0.88 |
22.3 |
0.88 |
22.3 |
Make-up torque (ft-lb. & N-m) |
12,000 |
16,248 |
12,000 |
16,248 |
Shank style |
DHD112 |
DHD112 |

|
"Slim" |
English |
Metric |
Standard drill pipe connection (see options) |
4-1/2 API reg pin |
Outside diameter (inch & mm) |
10.0 |
254 |
Length w/o bit shoulder to shoulder (inch & mm) |
71.3 |
1,811 |
Length with bit extended (inch & mm) |
80.6 |
2,047 |
Length with bit retracted (inch & mm) |
78.6 |
1,996 |
Weight w/o bit (lb & kg) |
562 |
1,237 |
Backhead across flats (inch) |
4 x 1-5/16 AF |
Minimum bit size (inch & mm) |
11.0 |
279 |
Maximum bit size (inch & mm) |
18.5 |
470 |
Bore (inch & mm) |
8.5 |
216 |
Piston weight (lb & kg) |
250 |
114 |
Stroke (inch & mm) |
4.5 |
114 |
Maximum pressure differential (psig & bar) |
250 |
17 |
Maximum choke diameter (inch & mm) |
0.88 |
22.3 |
Make-up torque (ft-lb. & N-m) |
12,000 |
16,248 |
Shank style |
DHD112 |
Air Consumption:
|
Standard |
"Slim" & Deep Hole |
100 psi/6,9 bar (scfm & l/s) |
570 |
269 |
738 |
348 |
blows per minute |
915 |
915 |
150 psi/10,3 bar (scfm & l/s)
|
1,029 |
485 |
1,288 |
608 |
blows per minute |
1,068 |
1,068 |
200 psi/13,8 bar (scfm & l/s)
|
1,529 |
721 |
1,813 |
855 |
blows per minute |
1,220 |
1,220 |
250 psi/17,2 bar (scfm & l/s)
|
2,070 |
976 |
2,313 |
1,091 |
blows per minute |
1,373 |
1,373 |
300 psi/20,7 bar (scfm & l/s)
|
2,651 |
1,250 |
2,788 |
1,315 |
blows per minute |
1,525 |
1,525 |
350 psi/24,1 bar (scfm & l/s)
|
3,272 |
1,543 |
3,238 |
1,527 |
blows per minute |
1,678 |
1,678 |
Above specifications/ratings are based on initial factory setting. |
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