Extension Drill Rod for Bench Drilling

GMD extension drill rod is for Top Hammer Production Drilling in mining, tunneling, Bench Drilling, drifting, long-hole drilling, construction and quarry work....

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Two ends threads can be used for connecting couplings, shanks, couplings or bits. Typically two ends of extension rods are male-male(MM Rod), while sometime one end is male and another one is female (we call it M/F rod).  

 

Thread Type:

For extension drill rod, there are R22, R25, R28, R32, R38, T38, T45, T51, ST58, GT60 threads, and different lengths of rods are available from 600mm to 6400mm.



 

Feature Of The Extension Drill Rod MF Rod: 

Drill rod using thread system. Drilling precision can be further improved by using this as the first rod in a normal drill string. Furthermore, since this is a speed rod design it will produce straighter holes and at least 10% higher penetration rate in good rock conditions compared to rod and coupling sleeve combination system.

Widely used in drifting, tunneling, benching, and long hole drilling

High strength chromium-molybdenum steel with high fatigue strength and excellent wear resistance


Extension Drill Rod for Bench Drilling, Long Hole    Drilling Underground

Code No.

Type

Thread

Length(mm)

Shape

Diameter(mm)

Weight(kg)

MM-T38-Rd39-T38-1000

MM

T38-T38

1000

Rd39

39

8

MM-T38-Rd39-T38-1220

MM

T38-T38

1220

Rd39

39

9.7

MM-T38-Rd39-T38-1500

MM

T38-T38

1500

Rd39

39

11.9

MM-T38-Rd39-T38-1830

MM

T38-T38

1830

Rd39

39

14.4

MM-T38-Rd39-T38-2000

MM

T38-T38

2000

Rd39

39

16

MM-T38-Rd39-T38-2435

MM

T38-T38

2435

Rd39

39

19.4

MM-T38-Rd39-T38-3050

MM

T38-T38

3050

Rd39

39

24.1

MM-T38-Rd39-T38-3660

MM

T38-T38

3660

Rd39

39

29.4

MM-T38-Rd39-T38-4265

MM

T38-T38

4265

Rd39

39

34

MF-T38-Rd39-T38-1220

MF

T38-T38

1220

Rd39

39

10.6

MF-T38-Rd39-T38-1525

MF

T38-T38

1525

Rd39

39

13.05

MF-T38-Rd39-T38-1830

MF

T38-T38

1830

Rd39

39

15.6

MF-T38-Rd39-T38-2435

MF

T38-T38

2435

Rd39

39

20.8

MF-T38-Rd39-T38-3050

MF

T38-T38

3050

Rd39

39

25.6

MF-T38-Rd39-T38-3660

MF

T38-T38

3660

Rd39

39

30.4

MF-T38-Rd39-T38-4265

MF

T38-T38

4265

Rd39

39

35.2

MM-T45-Rd46-T45-1000

MM

T45-T45

1000

Rd46

46

10.80

MM-T45-Rd46-T45-1500

MM

T45-T45

1500

Rd46

46

16.30

MM-T45-Rd46-T45-2000

MM

T45-T45

2000

Rd46

46

21.80

MM-T45-Rd46-T45-3050

MM

T45-T45

3050

Rd46

46

33.60

MM-T45-Rd46-T45-3660

MM

T45-T45

3660

Rd46

46

40.40

MM-T45-Rd46-T45-4265

MM

T45-T45

4265

Rd46

46

47.00

MM-T45-Rd46-T45-6095

MM

T45-T45

6095

Rd46

46

67.80

MF-T45-Rd46-T45-1000

MF

T45-T45

1000

Rd46

64

13.30

MF-T45-Rd46-T45-1220

MF

T45-T45

1220

Rd46

64

15.50

MF-T45-Rd46-T45-1500

MF

T45-T45

1500

Rd46

64

19.00

MF-T45-Rd46-T45-1525

MF

T45-T45

1525

Rd46

64

19.10

MF-T45-Rd46-T45-1830

MF

T45-T45

1830

Rd46

64

21.80

MF-T45-Rd46-T45-2000

MF

T45-T45

2000

Rd46

64

24.20

MF-T45-Rd46-T45-3050

MF

T45-T45

3050

Rd46

64

35.70

MF-T45-Rd46-T45-3660

MF

T45-T45

3660

Rd46

64

42.50

MF-T45-Rd46-T45-4265

MF

T45-T45

4265

Rd46

64

49.50

MF-T45-Rd46-T45-4880

MF

T45-T45

4880

Rd46

64

53.70

MF-T45-Rd46-T45-5490

MF

T45-T45

5490

Rd46

64

62.60

MF-T45-Rd46-T45-6095

MF

T45-T45

6095

Rd46

64

69.60

MF-ST58-Rd81-3660

MF

ST58

3660

Rd81

81

76.2

MF-ST58-Rd81-4265

MF

ST58

4265

Rd81

81

86.7

MF-ST58-Rd81-5490

MF

ST58

5490

Rd81

81

109.6

MF-ST58-Rd81-6095

MF

ST58

6095

Rd81

81

121.7

MF-ST58-Rd82-3660

MF

ST58

3660

Rd82

82

80

MF-ST58-Rd82-4270

MF

ST58

4270

Rd82

82

90

MF-ST58-Rd82-6095

MF

ST58

6095

Rd82

82

124


P.S.: RD means Round Type Drill Rod.

 

Male Thread and Female Tread

image010.gif

 

MF Extension Drill Rod (Speed Rod)

image012.jpg

 

MM Thread Type

image014.jpg

image016.jpg

 

Carburization and Heat Treatment

All Our extension drill rods are fully carburized with an advanced Bench Drilling heat treatment, combinated with phosphorization.

image020.jpg

 

Packing Picture

 image024.jpg


Key Words

MF / MM Rod

Drifter Rod ,

extension rod ,

threaded drill rod

Drill steel

Round drill rod

Extension Drilling Rod for Bench Drilling

Extension Drilling Rod for Long Hole Drilling Underground

Speed Rod


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