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.
M/F extension rod is a kind of round or hexagonal threaded drill
rod, one end is internal thread rod, and the other end is external
thread. Some kind of threaded drill rod is often referred to as MF
drill rod abroad. Due to its fast connecting drill rod with
coupling sleeves, reducing the weight of the complete drilling
tools, shortening the length of the threaded connection, reducing
the thread joint impact energy loss, therefore, it's more
convenient when loading and unloading, drilling speed &
drilling efficiency are both increased greatly.
(1) Threaded Connection: R22, R25, R32, R38, T38, T45, T51, T60 and
so on.
(2) Diameter: OD32, OD38, Hex32, Hex35, And so on.
(3) Length: 800-6000mm.
(4) Package: Ply-wooden cases or wrapped with plastic knitting and
then packed into bundles or as per your requests.
