Thread extension steel bars for rock drilling include extension
rod, MF rod, light extension drill rod, drifter rod, shank adapter
drill rod etc. We can also call such thread extension drill rod as
threaded drill rod or threaded pipe, they own one end thread or
both ends thread, with hollow round body or hollow hexagonal body.
It is the main part of the threaded connection drilling tools or
drilling equipments. Threaded drill rod is connected with top
hammer rock drill rigs via shank adaptors & couplings, another end,
they are connected with drill bits via thread also. Threaded rod
could be connected with other drill rods to constitute a complete
set of threaded connection whole drilling tools for drilling.
Threaded drill rods could be connected with one piece of shank
adapters and drill bits, or connected with lots of adaptors and
bits. And ther can also be used in shallow holes and small diameter
rock hole drilling, the applicable scope is wide, drilling speed,
impact energy transmission loss is small, high drilling efficiency,
easily to realize the drilling mechanization and improve the
superiority of drilling conditions. Therefore, thread extension
drill rods share a very very big proportion in the whole drilling
fields.
Thread extension steel bars for rock drilling must own high fatigue
strength, elasticity, rigidity and toughness, but strength and
toughness is contradictory. The thread at both ends of the thread
rods is a whole set of drilling tools, it's the key part of rod. It
is well known that the performance of the material could be played
well only after going through heat treatment to release its maximum
potential, therefore, the choice of material and heat treatment
process are important on an equal basis.
Drifter rod/Drifting rod:
Shank rod Hex25-R25, 10 feet.
Drifter rod R32-Hex25-R25, 8 feet 10 feet.
Drifter rod R28-Hex28-R25, 10 feet.
Drifter rod R32-Hex28-R28, 10 12 13 14 feet.
Drifter rod R32-Hex32-R28, 10 feet.
Drifter rod R38- Hex32-R28, 10 12 14 feet.
Drifter rod R38-Hex32-R32, 12 14 16 feet.
Drifter rod T38-Hex32-R32, 12 14 feet.
Drifter rod R38-Hex35-R32, 10 12 14 16 18 feet.
Drifter rod T38-Hex35-R32, 12 14 16 18 20 feet.
Drifter rod T38-Hex35-R35, 14 16 18 20 feet.
Drifter rod T38-Round39-R32, 14 16 18 20 feet.
MF drifter rod T38-Hex35-R32, 12 14 16 18 feet.
