QL50/55 Quantum Leap Hammer

Atlas Copco Rock Drilling Tools - Secoroc Down the Hole Equipment

Strong Performance and Affordability

Our Quantum Leap product line is available for those seeking a good balance between strong performance and cost. This product line was the drilling industry's first hybrid-combination of valve and valveless-air cycle down-hole drills. Setting many industry benchmarks, the Quantum Leap line continues to offer good value.

QL50/55 Specifications

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)	4.6	117	4.9	124
Length w/o bit shoulder to shoulder (inch & mm)	42.0	1,067	42.0	1,067
Length with bit extended (inch & mm)	46.3	1,176	46.3	1,176
Length with bit retracted (inch & mm)	45.3	1,149	45.3	1,149
Weight w/o bit (lb & kg)	132	60	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)	3.7	95	3.7	95
Piston weight (lb & kg)	31	14	31	14
Stroke (inch & mm)	3.75	95	3.75	95
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	QL50		QL50

Air Consumption: