DHD5 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.

DHD5 General Specifications:

	Standard		Quarry
	English	Metric	English	Metric
Standard drill pipe connection (see options)	3-1/2 API reg pin		3-1/2 API reg pin
Outside diameter (inch & mm)	4.5	115	4.9	124
Length w/o bit shoulder to shoulder (inch & mm)	46.0	1,168	46.0	1,168
Length with bit extended (inch & mm)	51.0	1,295	51.0	1,295
Length with bit retracted (inch & mm)	49.5	1,257	49.5	1,257
Weight w/o bit (lb & kg)	151	69	162	74
Backhead across flats (inch)	2 x 3-1/2 AF		2 x 3-1/2 AF
Minimum bit size (inch & mm)	5.1	130	5.5	140
Maximum bit size (inch & mm)	6.0	152	6.0	152
Bore (inch & mm)	3.6	92	3.6	92
Piston weight (lb & kg)	34	15	34	15
Stroke (inch & mm)	4.0	102	4.0	102
Maximum pressure differential (psig & bar)	350	25	350	25
Maximum choke diameter (inch & mm)	0.38	9.6	0.38	9.6
Make-up torque (ft-lb. & N-m)	5,000	6,770	5,000	6,770
Shank style	DHD350		DHD350

 

Air Consumption:

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