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Top Hammer Thread Drilling Tool T38/T45/T51 MM and MF Extension Rods

Extension rods are one major spare part in terms of drill application area, there are two shapes of extension rods, one is round type, another one is hexagonal type.
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.

Quantity:
  • Extension Drill Rod
  • BESTLINK

Top Hammer Thread Drilling Tool T38/T45/T51 MM and MF Extension Rods

Extension drill rods are one major spare part in terms of drill application area, there are two shapes of extension rods, one is round type, another one is hexagonal type.

But all extension rods are threaded and made by hollow drill steels, this means usually extension rods are hollow.This hollow hole are usually named flushing hole, used for transmitting water or air during drilling. Two ends threads can be used for connecting couplings, shanks, couplings or bits. Typically two ends of extension rods are male, while sometime one end is male and another one is female, then we call it M/F rod. We need couplings to connect extension rods, while for M/F rods, because one end is female, so couplings are not necessary.


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 MF Rod

 R25 (1")

MM HEX Extension rod
Rod section 24.8mm
 

Length (mm) Part No. Fully carburized. Part No. Surface hardened Weight approx (kg)
1220
3050
202-0212-C,02
202-0231-C,02

3.7
10.1


MM HEX Extension rod
Rod section 28.5mm
 

Length (mm) Part No. Fully carburized. Part No. Surface hardened Weight approx (kg)
915
1000
1220
1525
1830
2435
3050
202-0309-C,02
202-0310-C,02
202-0312-C,02
202-0315-C,02
202-0318-C,02
202-0324-C,02
202-0331-C,02






202-0331-SH,03
3.3
3.9
4.5
5.7
6.9
9.2
11.9


MF HEX Speedrod
Rod section 28.5mm
 

Length (mm) Part No. Fully carburized. Part No. Surface hardened Weight approx (kg)
610
1220
202-0306-MF-C,02
202-0312-MF-C,02

2.6
5.0

R28 (11/8")

MM HEX Extension rod
Rod section 32mm
 

Length (mm) Part No. Weight approx (kg)
3050 207-0431-C,02 15.0


MF HEX Speedrod
Rod section 32mm
 

Length (mm) Part No. Weight approx (kg)
3050 207-0431-MF-C,02 15,7

R32 (11/4")

MM Round Extension rod
 

Length (mm) Part No. Fully carburized. Part No. Surface hardened Weight approx (kg)
915
1000
1220
1830
2435
3050
3660
203-2509-C,02
203-2510-C,02
203-2512-C,02
203-2518-C,02
203-2524-C,02
203-2531-C,02
203-2537-C,02




203-2524-SH,03
203-2531-SH,03
203-2537-SH,03
4.8
5.7
6.5
9.8
13.2
16.6
20.0


MF Round Extension Rod
 

Length (mm) Part No. Fully carburized. Part No. Surface hardened Weight approx (kg)
915
1220
1525
1830
2435
3050
3660
203-2509-MF-C,02
203-2512-MF-C,02
203-2515-MF-C,02
203-2518-MF-C,02
203-2524-MF-C,02
203-2531-MF-C,02
203-2537-MF-C,02

5.5
7.3
9.0
10.6
14.0
17.1
20.7


MF Round Speedrod
 

Length (mm) Part No. Fully carburized. Part No. Surface hardened Weight approx (kg)
1830
3050
203-2518-MF-90-C,02
203-2531-MF-90-C,02

11.5
19.3


MM Round Drifter rod
 

Length (mm) Part No. Weight approx (kg)
4000
4310
203-2540-03-C,02
203-2543-03-C,02
22.0
24.8


MF Round Guide rod
 

Length (mm) Part No. Weight approx (kg)
3050
3660
203-4731-MF-C,02
203-4737-MF-C,02
27.0
32.0

R/T38 (11/2")

MM Hex Extension rod
Rod section 35.8mm
 

Length (mm) Part No. R38 thread Part No. T38 thread Weight approx (kg)
1220
3050

235-0512-C.02
235-0531-C.02
8.4
18.7


MF Round Speedrod
 

Length (mm) Part No. R38 thread Part No. T38 thread Weight approx (kg)
915
1220
1525
1830
3050
3660
4270
4880
5530

235-4709-MF-C.02
235-4712-MF-C,02
235-4715-MF-C,02
235-4718-MF-C,02
235-4731-MF-C,02
235-4737-MF-C,02
235-4743-MF-C,02
235-4749-MF-C,02
235-4755-MF-C,02
8.3
10.9
13.3
15.8
25.5
30.5
35.4
41.9
46.9


MM Round Speedrod

Surface hardened.

Length (mm) Part No. R38 thread Part No. T38 thread Weight approx (kg)
1830
2435
3050
3660
3965
4270
204-2718-SH,03
204-2724-SH,03
204-2731-SH,03
204-2737-SH,03


 


235-2731-SH,03
235-2737-SH,03
235-2740-SH,03
235-2743-SH,03
14.8
19.5
24.3
30.0
32.5
33.9


Fully carburized.

Length (mm) Part No. R38 thread Part No. T38 thread Weight approx (kg)
280
1220
1525
1830
3050
204-2702-C.02



 

235-2712-C,02
235-2715-C,02
235-2718-C,02
235-2731-C,02
2.0
10.0
12.5
14.4
24.0


MM Round Double Thread Extension Rod
 

Length (mm) Part No. R38 thread Part No. T38 thread Weight approx (kg)
3050
3660

235-2731-95-SH,03
235-2737-95-SH,03
23.8
30.0


Drifter rod
For one rod drilling drifter rods can be used.

MF Guide Speedrod
 

Length (mm) Part No. T38 thread Weight approx (kg)
1830
3050
3660
235-4918-MF-C,02
235-4931-MF-C,02
235-4937-MF-C,02
21.1
34.5
41.3


Guide tube
 

Hole diameter (mm) Tube diameter (mm) Length(mm) Part No. Weight approx (kg)
64
64
64
64
64
64
76
56
56
56
56
56
56
64
1220
1525
1830
3050
3660
4920
3660
235-7012,10
235-7015,10
235-7018,10
235-7031,10
235-7037,10
235-7049,10
235-6937,10
12.6
14.0
17.4
28.3
32.8
47.9
51.0

T45 (13/4")

MM Hex Extension rod
Rod section 42.6mm
 

Length (mm) Part No. Fully carburized. Part No. Surface hardened Weight approx (kg)
3050
3660
236-0731-C,02
236-0737-C,02

25.6
30.8


MM Round Extension Rod
 

Length (mm) Part No. Fully carburized. Part No. Surface hardened Weight approx (kg)
3050
3660
4270
6095

236-2931-SH,03
236-2937-SH,03
236-2943-SH,03
236-2961-SH,03
33.3
39.9
46.7
68.9


MF Round Speedrod
 

Length (mm) Part No. Fully carburized. Part No. Surface hardened Weight approx (kg)
1525
1830
3050
3660
4270
6095
236-4915-MF-C,02
236-4918-MF-C,02
236-4931-MF-C,02
236-4937-MF-C,02
236-4943-MF-C,02
236-4961-MF-C,02

18.2
21.5
34.7
41.6
49.0
69.0


MF Guide rod
 

Length (mm) Part No. Weight approx (kg)
3660 236-5137-MF-C,02 55.0


Guide tube
 

Hole diameter (mm) Tube diameter (mm) Length(mm) Part No. Weight approx (kg)
76
76
76
76
89
89
64
64
64
64
76
76
1220
1525
1830
3660
1830
3660
236-6912,10
236-6915,10
236-6918,10
236-6937,10
236-6618,10
236-6637,10
20.0
21.6
25.4
49.0
40.0
77.8

T51 (2")

MM Round Extension rod
 

Length (mm) Part No. Fully carburized. Part No. Surface hardened Weight approx (kg)
3660
6095

237-3137-SH,03
237-3161-SH,03
52.3
84.0


MF Round Speedrod
 

Length (mm) Part No. Fully carburized. Part No. Surface hardened Weight approx (kg)
1830
3660
4270
6095
237-5118-MF-C,02
237-5137-MF-C,02
237-5143-MF-C,02
237-5161-MF-C,02

27.5
51.8
64.0
85.6


Guide tube
 


Hole diameter (mm) Tube diameter (mm) Length(mm) Part No. Weight approx (kg)
89
89
102
76
76
87
1830
3660
3660
237-6618,10
237-6637,10
237-6837,10*
40.0
79.1
80.0



Bestlink Factory

Xiamen Bestlink Factory Co., Ltd  is  committed  to  provide  the  best  drilling  and  cutting machine,  tools and accessories products in marble and granite stone quarrying,  as well as in civil engineering application, especial demolition project. it is now a leading manufacturer of cutting and drilling equipment for the extraction of marble, granite  and ornamental stones in china.  

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