Audited Supplier
Sansung rock drilling extension rod are made with high quality of alloy steel bar and tungsten carbides with superior wear resistance and impact toughness superior, through heat treatment so that it can withstand the toughest rock drilling demands, and transmit intensive impact energy into the rock with the least possible loss of energy. They are widely used in all kinds of mining, drilling, quarrying, engineering, construction, water well drilling, oil exploring industries etc.
Extension rod:
Other names are Extension drill steel, Extension drill rod, and Extension steel, M/Frod (Speed rod), produce Hexagonal and round cross-sections,Hexagonal rods are more rigid, heavier and transfer energy more efficiently,while increasing flushing. Round rods are generally lighter than hexagonal rodsand are normally used in extension drilling applications. With the longer steel tending to be larger in diameter, conventional extension steel is characterizedby duplicate thread on each end of the steel.
Extension rods are made by hollow drill steels, different lengths are available from 600mm to 6400mm. This hollow hole are usually named flushing hole, used for transmitting water or air during drilling. And the threads can be used for connecting couplings, shanks adapters or bits.
Male/Female (M/F) rod, speed rod:
M/F drill steel is an alternative to couplings sleeves to include the female part of the threaded connection as an integral part of the drill steel. M/F drill steel provides more rigid connections and is easier to uncouple and handle. The service life also tends to be better than with separate couplings. The advantages of drilling with M/F steel include: easy handling, quicker uncoupling, tighter connections, the potential to drill straighter holes, and longer service life.
For extension rod and M/F steel process, the below two different types of heat treatment are used to strengthen high speed and powerful percussive drill string components to maximize their performance and reliability. Longer steel larger in diameter, conventional extension steel, Hexagonal and round cross sections are available.
Carburizationis a process used to harder the entire rod surface both internally and externally to strengthen and extend the life of the rod.
High frequency induction is process where only the thread ends of the rod are hardened to lengthen thread life.
R32 thread:
Extension rods, R32-Round32-R32, length915mm/1000mm/1220mm/1830mm/2435mm/3050mm/3660mm
M/F rods, R32-Round32-R32, length 915mm/1220mm/1525mm/1830mm/2435mm/3050mm/3660mm
Guide speed rods, R32-Round39-R32, length 3050mm/3660mm
Guide tube, R32-Round46-R32, length 1220mm/1525mm/1830mm/3050mm
T38 thread:
Extension rods, T38-Round39-T38, length1220mm/1525mm/1830mm/2435mm/3050mm/3660mm/3965mm/4270mm/4880mm/5530mm/6095mm
Double thread extension rods, T38-Round39-T38, length 3050mm/3660mm
MF rods, T38-Round39-T38, length915mm/1220mm/1525mm/1830mm/3050mm/3660mm/4270mm/4880mm/5530mm/6095mm
Guide speed rods, T38-Round46-T38, length 1830mm/3050mm/3660mm/4270mm/4880mm/5530mm/6095mm
Guide tube, T38-Round56-T38, length 1220mm/1525mm/1830mm/3050mm/3660mm/4920mm
Hex extension rods, T38-Hex32-T38, length 1220mm/1830mm/2435mm/3050mm/3660mm
T45 thread:
Extension rods, T45-Round46-T45, length 1830mm/2435mm/3050mm/3660mm/4270mm/5530mm/6095mm
MF rods, T45-Round46-T45, length1525mm/1830mm/3050mm/3660mm/4270mm/5530mm/6095mm
Guide speed rods, T45-Round52-T45, length 3050mm/3660mm/4270mm/5530mm/6095mm
Guide tube: T45-Round64-T45, length 1220mm/1525mm/1830mm/3050mm/3660mm
Guide tube: T45-Round76-T45, length 1830mm/3660mm
T51 thread:
Extension rods, T51-Round52-T51, length3050mm/3660mm/4270mm/4880mm/5530mm/6095mm
MF rods, T51-Round52-T51, length1525mm/1830mm/3050mm/3660mm/4270mm/4880mm/5530mm/6095mm
Guide rods, T51-Round76-T51, length 1830mm/3660mm
Guide tube, T51-Round87-T51, length 3660mm
T60 thread:
MF rods, T60-Round60-T60, length 3660mm/4265mm/6095mm
R25 (1")
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 rodRod 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 rodRod 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 rodRod 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 |
