T38 Drill Bits for Long Hole Drilling

T38 Drill Bits are widely used in Bench drilling, underground long hole drilling to match extension MF rod, MM rod heavy duty top hammer Drilling....

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GMD offers a complete selection of Top Hammer Drilling Tools to meet all of your drilling needs, which are suitable for any type of drilling application in mining, tunneling, construction and quarry work.

With the top quality of alloy steels and the best carbides, we produce all Top Hammer Drilling Tools by hot press technology and multiple heat-treated process to extend the product life for maximum wear and performance in the toughest of drilling conditions.

Our products are suitable for powerful percussive drills and top hammers with high speed drifter, such as Atlas Copco 282 rocket boomer, Atlas Copco 352 rocket boomer jumbo, AtlasCopcoD7roc, Furukawa HCR 1200, Tamrock, and Ingesoll Rand ECM660.

The products are widely used in bench and production drilling, extensional drilling.

 

Specification of T38 Drill Bits , kindly check below:

Thread type: T38

Head diameters: 57mm ~ 115mm   

Face designs; Flat Face, Drop Center, Uni-face;

Carbide shape: Dome, Ballistic , Semi-Ballistic, 

Skirt designs: Standard, retrac, straight retrac

Application: Bench drilling, underground long hole drilling to match extension MF rod, MM rod heavy duty top hammer.

 

Normal Skirt Flat Face Domed Button Bit


  

T38 Drill Bits Retrac Flat Face Semi-Ballistic Button Bit


All tooth bit series passivation cycle is long, the wear life of about with the blade diameter titles bit wear life of 5-6 times, can save auxiliary working hours, reduce the physical labor of workers and accelerating the pace of work. Therefore different diameter of the taper connection and thread connection ball tooth bit is widely used in all kinds of hard and brittle rock with the drilling rig. Sweden's engineering and technical personnel that ball tooth bit and hydraulic drilling jumbo combination, is the best matching of modern drilling technology. 

In the recent 20 years, Thread Button Bit series development very fast, it is accompanied by hydraulic rock drill hole quickly save industry to improve the drilling speed and drilling auxiliary working hours.

 

How to choose Right T38 Drill Bits ?

Button Bit Face & Skirt Design  

 Face & Skirt Design

Application

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Flat Face: For Drilling in medium to hard and abrasive rock

image012.gif

Drop Center   Face: For drilling in medium hard, maximum hole deviation control

image014.gif

Normal Skirt: For drilling in very hard and very abrasive rock formation which is compact

image016.gif

Retrac Skirt: broken or fissured rock where it is difficult to retrac the drilling string due to the hole collapse

 

Diameter

No x button diameter

Flushing hole

Weight approx kg

mm

inch

Front

Gauge

Angle

Front

Side

Spherical buttons

64

2 1/2

4 x 10

8 x 10

30°

2

-

2.2

64

2 1/2

3 x 10

6 x 11

35°

3

-

2.2

70

2 3/4

4 x 10

8 x 11

40°

2

-

2.4

70

2 3/4

3 x 10

6 x 13

35°

3

-

2.4

70

2 3/4

4 x 10

8 x 11

35°

4

-

2.4

76

3

4 x 11

8 x 11

40°

2

-

3.3

76

3

4 x 11

8 x 11

35°

4

-

3.3

76

3

4 x 11

8 x 12

35°

4

-

3.3

89

3 1/2

4 x 13

8 x 13

40°

2

-

4.8

89

3 1/2

5 x 13

8 x 13

35°

2

-

4.8

89

3 1/2

6 x 11

8 x 12

35°

2

-

4.8

89

3 1/2

4 x 11

8 x 13

35°

4

-

4.8

89

3 1/2

4 x 13

8 x 13

35°

4

-

4.8


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