Model Number	3/3.5,4,5,6,8,10,12 inches	Certification	ISO CE
Drill Rock hardness	F=6-20	Warranty	1 Year
Condition	New	After-sales Service	7X24hours available
Type	Rotary Drilling Rig	Color	As request
Processing Type	Forging	Button shape	Spherical, Ballistic, Semi-ballistic
Place of Origin	Beijing, China (Mainland)	Bit face shape	Flat, concave, convex, drop center
Brand Name	JCDRILL	Other shanks	COP,DHD,MISSION, SD
Usage	Rock drilling	Type	DTH Hammer
Material	Carbide	Machine Type	Drilling Tool

DTH Hammer
Type	Model	Outer Diameter
High pressure DTH Hammer
3 inch	JD25A	71mm
3.5 inch	JD35A/M30	82mm
4 inch	JD45A/QL40A/M40/SD4	99mm
5 inch	JD55A/QL50A/M50/SD5	125mm
6 inch	JD65A/QL60A/M60/SD6	142mm
8 inch	JD85A/QL80A/M80/SD8	180mm
10 inch	HD100A/SD10	225mm
12 inch	JD125A/SD12	275mm
14 inch	JD140A	-
Middel Pressure DTH Hammer
2.5 inch	BR1	56mm
3 inch	BR2	64mm
3.5 inch	BR3	82mm
Lower Pressure DTH Hammer
3 inch	CIR65	68mm
3.5 inch	CIR70	76mm
4 inch	CIR90	99mm
5 inch	CIR110	110mm
6 inch	CIR150	150mm
8 inch	CIR170	170mm
Back Hammer
6 inch	BH140	155mm
8 inch	BH170	190mm
10 inch	BH190	220mm
12 inch	BH240	190mm

Minimum Order Quantity	N/A
Price
Packaging Details	Standard Export Delivery Package
Delivery Time	7days
Payment Terms	T/T
Supply Ability	Based on Detailed Order

In case of jamming of any driling tool during the boring process, the back hammer will help you save time and money. The back hammer may be mounted on the drill pipe joint between the borehole gripper and the swivel head, thus, creating a combined effect of effective reverse impact and vibration. Sturdy and reliable, the back hammer is composed of three components and a plastic housing which acts both as an exhaust emission guider and a muftler. With regards to the maintenance, i's only necessary to keep it clean and the linking section well protected when the back hammer is not working. 1 JCDRILL back hammer 2 saving time and equipment 3 180-225mm diameter 4 API 3 1/2" standard 5 high quality material 6. Competitive price DTH back hammers are used for dealing with the stuck drill, hit up to solve the stuck drill problem. Main model: BH140 BH170 BH190 BH240

Back Hammer
Products	Pressure	Thread	Total Length(mm)	Diameter	KG
LBH140	8Bar	API 3 1/2"	510	140	31
LBH160	8Bar	API 3 1/2"	540	160	44
LBH190	8Bar	API 4 1/2"	580	190	63
LBH240	8Bar	API 4 1/2"	600	240	85