DHD Cemented Carbide DTH Drill Bit

DHD Cemented Carbide DTH Drill Bit is Mainly used for Quarrying, Ore Mining, Coal Mining, soft, medium hard, and hard rock, blast hole drilling and water well drilling project, Marble quarry or well drilling and other construction projects....

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GMD could supply the DHD series DTH Bit with cemented carbide buttons have very good wear-resistant. Buttons are strong in the mining process and could meet requirements of various rocks , and the service lifetime is very long. 

Meanwhile, GMD could supply lots of grades DTH Bits, they can be chosen according to different applications. Both soft, medium-hard, and hard rocks, Our DTH Bit could have a good performance.

 

Product Name: DHD Cemented Carbide DTH Drill Bit

Shank Type: DHD 3.5, DHD340A, DHD350R, DHD360, DHD380,

Bit Diameter: 85mm-305mm

Bit Face: Flat Face, Convex Face, Concave Face, Drop Center, Double Gauge.

 

Details, kindly check below:

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DHD Cemented Carbide DTH Drill Bit

Shank Type

Diameter in mm

Air Holes No.

Gauge Buttons

Face Buttons

Approx. Weight

DHD3.5

85

2

6*13mm

4*12mm

4.2 KGS

90

2

7*13mm

5*12mm

4.5 KGS

95

2

7*13mm

6*12mm

4.8 KGS

100

2

7*13mm

6*12mm

5 KGS

105

2

8*12mm

7*12mm

5.5 KGS

DHD340A

105

2

7*14mm

6*13mm

8.5 KGS

110

2

7*14mm

6*13mm

8.8 KGS

115

2

8*14mm

7*13mm

9.0 KGS

120

2

8*16mm

7*13mm

9.9 KGS

127

2

8*16mm

7*13mm

11.0 KGS

DHD350R

135

2

8*16mm

8*13mm

15.0 KGS

140

2

8*17mm

7*14mm

16.0 KGS

146

2

8*18mm

7*14mm

17.0 KGS

152

2

8*17mm

8*14mm

17.5 KGS

165

2

8*18mm

9*16mm

18.5 KGS

DHD360

152

2

8*17mm

8*14mm

22.0 KGS

165

2

8*18mm

9*16mm

26.0 KGS

171

2

8*18mm

10*16mm

27.0 KGS

190

3

9*18mm

11*16mm

28.5 KGS

203

3

9*18mm

12*16mm

29.5 KGS

DHD380

203

2

9*18mm

12*16mm

40.0 KGS

216

2

10*18mm

17*18mm

49.0 KGS

241

2

10*18mm

17*18mm

64.0 KGS

254

3

12*18mm

19*18mm

71.0 KGS

292

3

12*18mm

30*18mm

85.0 KGS

305

4

12*18mm

30*18mm

95.0 KGS

 

How to Select Right DTH Bits Face shape

Face Designs

 

Concave

image014.jpg

The concave bit design is an excellent all around bit, suitable for soft and hard formations. The cone shaped face design provides good stability during drilling, allowing for straighter holes while reducing equipment vibration. The carbide configuration gives added penetration in many formations.

 

Convex

image016.jpg

Suitable for most drilling applications, particularly hard, abrasive rock to give a combination of speed and good service life.

  

Flat Face

image018.jpg

Used for general purpose drilling, the flat face design is considered effective in very broken ground as well as hard formations and softer formations that tend to over drill.

 

PACKING



 


Rock Bit Care

Button

The total life or distance that a rock bit will drill depends on many factors. Of these,

rock bit reconditioning can be the major factor both in the cost and performance of

any rock bit, button or rooftop insert.

image024.jpg


1. When the button wears at a more rapid rate than the body, especially in harder, more abrasive rock, the buttons should be reconditioned frequently.

image026.jpg

2. Button bits should be reconditioned if the buttons polish or show signs of surface fracturing in non-abrasive rock. This will prevent the surface fractures from propagating which could result in fracturing the buttons.

  

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