Air DTH Drilling Hammer Bits

 

 

Our Drilling Air Hammer Bits and drill pipe are used Chinese leading steel manufacture’s steel. We also have advanced production equipment worth millions of dollars: Grinding machine equipment with high processing accuracy, heat treatment equipment imported from Europe. Thus our DTH Air Hammer are designed and built to perfection. They are faster, lighter, safer, more service friendly and longer lasting than ever before.

 

A down-the-hole drill, commonly abbreviated as DTH, is primarily a pneumatically powered rock or ground drill in which the percussion mechanism is placed directly behind the drill bit so that it descends into the drill hole with the bit. The Air Hammer Bits receive compressed air as well as the necessary feed force and rotation from the drill pipes. Cuttings at the bottom of the hole are flushed upward by air. As the hole gets deeper, drill pipes are added to the top of the drill string. While the DTH Air Hammer casing directs the drill bit, the piston strikes the bit's impact surface directly. Fast hammer impact fractures hard rock into tiny fragments that are propelled into the air by the DTH hammer's air exhaust.

 

 

 

 

 

 

 

 

 

Technical Parameters Of QL40 DTH Hammers

Bit Shank	QL40
Hole Range	Φ110-130mm
Connection Thread	API 2 3/8" Reg
Working Pressure	10-25Bar / 1-2.5Mpa
Air Consumption(m3/min)	14Bar	7.4
24Bar	15
Length	1103mm
Weight	42.6Kg

 

 

Technical Parameters Of QL40 DTH Bits

Diameter		Gauge Buttons	Front Buttons				Weight(KG)	Part Number
mm	Inch		Flat Face	Convex Face	Concave Face	Face Type
115	4 1/2	Φ14*7	Φ14*2	Φ14*4	/	Convex Face	9.6	LR-QL40-115CV-1
115	4 1/2	Φ16*7	Φ14*2	Φ14*4	/	Convex Face	9.6	LR-QL40-115CV-2
115	4 1/2	Φ14*8	Φ14*2	Φ14*4	/	Convex Face	9.6	LR-QL40-115CV-3
125	4 15/16	Φ14*8	Φ13*3	Φ14*4	/	Convex Face	10.2	LR-QL40-125CV
127	5	Φ14*8	Φ13*7	/	/	Flat Face	10.3	LR-QL40127FF
130	5 1/8	Φ14*8	Φ14*7	/	/	Flat Face	10.5	LR-QL40-130FF