Miningwell DHD55A 5 Inch High Air Pressure Rock Drilling Mining Bit DTH Hammer DTH Hammer Sale China on Promotion

• Customization: Available
• After-sales Service: Provided
• Warranty: 3 Months
• Model NO.: DHD55A
• Standard: API
• Manufacturing Process: Forging
• Material: Carbon Steel
• Transport Package: Carton
• Specification: 130X18X23 cm
• Trademark: D Miningwell
• Origin: Zhejiang, China
• Production Capacity: 5000PCS Per Month

Product Description

DTH Air Hammer gives you more power down the hole, making your investment produce more in less time. 
The D Miningwell DHD high pressure DTH hammer is used in many different applications which include but are not limited to heavy construction, mining, oil and gas, quarries, and water-well.
This high air pressure DTH hammer work without footvalve is designed and developed by our own, which is the one of the most advanced DTH hammer in the world.
It has following advantages
1.Avoid the problem happens on foot valve. Fracture,expansion and contraction.
2.Lower air comsumption and higher impact frequency. 15-30% higher drilling efficiency than the bit with foot valve.
3.Simpler structure and less spare parts, makes easier & cheaper maintenance.
4.Heat-hardened spare parts,makes longer serving life and less problem.
5.Thread connection for top sub and drive chuck,makes easier disassembly.

 

Model	DHD340	DHD350	DHD360	DHD380
Length(Lessbit)	1032 mm	1209 mm	1063 mm	1492 mm
Weight (Lessbit)	43kg	78.5kg	100.5kg	190 kg
External diameter	99mm	125mm	142mm	180mm
Hole Range	φ110-135 mm	φ135-155 mm	φ150-190 mm	φ195-254 mm
Connection Thread	API2 3/8"REG	API2 3/8"REG	API3 1/2"REG	API4 1/2"REG
WorkingPressure	1.0-2.2MPa	1.0-2.5MPa	1.0-2.5MPa	1.5-3.3MPa
Recommended rotation speed	30-60 r/min	30-60 r/min	30-60 r/min	30-60 r/min
Air consumption	5.5m³/min (1.0MPa)	9m³/min (1.0MPa)	20m³/min (1.0MPa)	26m³/min (1.8MPa)
	10m³/min (1.8MPa)	15m³/min (1.8MPa)	28m³/min (1.8MPa)	34m³/min (2.4MPa)
Parts	Weight (kg)
Top sub	8.8	14.7	20.3	42
"O" Ring	0.01	0.02	0.02	0.02
Check Valve	0.46	1	0.8	1.3
Spring	0.04	0.06	0.05	0.09
Rubber Buffer	0.2	0.06	0.3	0.4
Valve Seat	2.1	4.2	5	13
Inner Cylinder	2.45	4.9	4	9.1
Piston	9	15.5	23.5	41.5
Piston Case	159	30.3	37.2	62.5
Retainer Ring	0.2	0.3	0.6	1.2
Drive Chuckk	3.7	7.1	6	18.2
Adjuster Ring	/	0.1	/	0.2
Ring Lock	/	0.2	/	/
adjuster Shim	/	/	/	0.2
Guided Sleeve	/	/	2.5	/