Big Hole DTH Hammers and Bits

Big Hole DTH Hammers and Bits are used for wells , oil, gas and construction drilling. It is suit for the Hole Range about 300mm to 800mm....

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With professional manufacturing experience in DTH hammer production, GMD can supply you with high pressure and medium to low pressure DTH hammers. It strictly matches with API standard and other Chinese industry standards. It is durable for being produced with advanced craftwork and good material.

 

Bit Shank: GD330, GD450, GD525

Hole Range: φ350mm-800mm

 

The main features of Big Hole DTH Hammers and Bits are as following:

●  Using the latest rock drilling theory. optimizing the inside structure and the size or the air distribution. to make the DTH hammer obtain the optimal energy transfer and make it achieve faster drilling speed and lower air consumption.

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

●  The check valve can be replaced to the one with bigger air controlling hole to provide more efficient cutting discharge.

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

disassemble.


Big Hole DTH Hammers and Bits

INCH

Bit Shank

Connection Thread

External Diameter

Bit Diameter

Length (without bit)

Working Pressure

Recommended Rotation Speed

Code No.


mm

mm

MM

KG

MPA

R/MIN

15

GMD330

API 7   5/8"REG

330

350-660

3870

1050

1-2.5

15-25

18

GMD450

According to   your request

450

550-700

2195

1450

1-2.5

15-25

24

GMD525

According to   your request

525

610-800

2650

2895

1-2.5

15-25

 

Two Type DTH Hammer



 

Big Hole DTH Hammers and Bits for Construction Drilling


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Big Size DTH Hammer for Water Wells


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