Description: extension rod, other names are Extension drill steel, Extension drill rod, and Extension steel, M/F rod ( Speedrod ) , Produce Hexagonal and round cross sections, Hexagon rods are more rigid, heavier and transfer energy more efficiently, while increasing flushing. Round rods are generally lighter than hexagonal rods and are normally used in extension drilling applications. With the longer steel tending to be larger in diameter, conventional extension steel is characterized by a duplicate thread on each end of the steel. Male / Male rod, 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. 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. Carburization is a process used to harden the entire rod surface both internally and externally to strengthen and extend the life of the rod. High Frequency Induction is a process where only the thread ends of the rod are hardened to lengthen thread life. Our comprehensive range of bench and production rock drilling tools includes everything from 1” rope thread equipment all the way up to T60 thread equipment, Many customers say that our rods, tubes and button bits are the best on the market today. Let’s just say they will improve productivity considerably. R25 (1”) R28 (1 1/8”) R32 (1 1/4”) R/T38 (1 1/2”) T45 (1 3/4”) T51 (2”) T60 (2 3/8”) Drill bit R/T38 Extension rod T38 – Hex. 32 mm – T38 Extension rod T38 – Round 38 mm – T38 (Speedrod) Extension rod R38 – Round 38 mm – R38 Extension rod T38 – Round 38 mm – T38 Extenstion rod T38 – Round 38 mm – T38 (with double thread) Guide rod T38 – Round 45 mm – T38 (Speedrod) Guide tube T38 Coupling R/T 38
Rock drilling tools include: drill bit,drill rod, shank and coupling. The piston of drill rig directly impacts the shank, makes impact power reach the bit through rod by the form of stress wave, so as to work on the breakage of rock. The primary breaking way is impacting while the secondary is cutting; both are with high drilling efficiency. Usually the land surface of the earth is covered with loose, unconsolidated material such as soil, clay, silt, sand, gravel and boulders, which varies in depth from a few centimeters to hundreds of meters.Use concentric system can drill this complex formation very well.The systems are available through the whole product range the smallest being for 114 mm (4 1/2″) casing and largest size available at the moment is for 1220 mm (48″) casing.