Extension rod: Other names are Extension drill steel, Extension drill rod, and Extension steel, M/F rod (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 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 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 transimitting 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.
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Trade Leads Directory -> All Trade Leads -> Construction -> Pipes & Tubes -> GT60 thread mf drilling rods
