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big hole dth hammer, 1.faster drilling speed, 2.lower air consumption, 3.reliable anti-shedding device, 4optimal energy transfer - details see: https://www.machineto.com/big-size-hydraulic-hammer-using-in-water-wells-oil-gas-and-construction-drilling-10317022

big size dth hammer using in water, wells, oil, gas and construction drilling:

1. 10 years manufacturing experience;

2. Certificate: ISO9001:2008

3. Material: Carbide

Based on the characteristics of the wells, oil, gas and construction drilling, our company self-designed, developed and manufactured this kind of high air pressure DTH hammer.

It has the following characteristics:

1. Using the latest rock drilling theory, optimizing the inside structure and the size of the air distribution, to make the DTH Hammer obtain the optimal energy transfer and make it achieve faster drilling speed and lower air consumption.

2. For such projects as the drill bit break, retrieving very difficult, we specially designed a safe and reliable anti-shedding device for the bit.

3. The check valve can be replaced to the one with bigger ail controlling hole to provide more efficient cuttings discharge.

4. The top sub and the drive chuck have special thread, which can achieve an easier disassemble.

ND142A DTH Hammer Technical Data

Length (Less bit)	Weight (Less bit)	External diameter	Bit Shank	Hole Range		Connection Thread
1388mm	102.00kg	Φ142mm	DHD360	Φ155-Φ195		API3 1/2”Reg
Working Pressure	Impact rate at 1.7Mpa	Recommended rotation speed		Air consumption
				1.0Mpa	1.8Mpa		2.4Mpa
1.0-2.5Mpa	25HZ	20-30r/min		9m³/min	18m³/min		26m³/min

Item Description	Weight (kg)	Part Number
1. Top Sub 2. “O” Ring of Top Sub 3. Check Valve 4. Spring 5. Air Distributor 6. Internal Cylinder 7. Piston 8. External Cylinder 9. Guided Sleeve 10. “o” Ring of Stop Ring 11. Stop Ring 12. Breakout Ring 13. Drive Chuck 14. Retainer 15. Drill Bit	20.00 0.02 0.70 0.10 3.50 4.20 23.00 31.50 6.50 0.01 0.60 0.20 5.00 3.50 27.00	ND142A01 ND142A02 ND142A03 ND142A04 ND142A05 ND142A06 ND142A07 ND142A08 ND142A09 ND142A10 ND142A11 ND142A12 ND142A13 ND142A14 ND142A15