Extension drifter rod
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, 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.
handle. The service life also tends to be better than with separate
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.-Cannibalization 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.
Drifter rod, another names are tunneling steels, tunneling rod,
drifting drill rod, has Round and hexagon rod available, most of
drifting drill steel with drill Steel Hexagon is for tunneling and
drifting drilling application. Hexagon rods are more rigid, heavier
and transfer energy more efficiently,while increasing flushing.
It is common practice to bump up the drive end of drifting steel
for added strength at the rock drill end to accommodate larger
diameter and shank adapters. Drill steel is available in many
standard lengths to match the drill feeds on a multitude of
available drifting jumbos.Two different types of heat treatment are
used to strengthen our percussive drill string components to
maximize their performance and reliability. Cannibalization and
middle frequency induction surface quenching as two process for
strength the total quality and performance and life.
Extension rod / Drift rod
Thread drill rod Made with best quality carbon steel bar,
through heat treatment like famous brands
carbon steel bar
Round shape and hexagonal type
Thread Extension Rod and MF rod
1-12 inch middle-low/high air pressure DTH hammers & bits
Big hole high air pressure DTH hammer using in water well, oil, gas
and construction drilling
Eccentric overburden drilling Equipment
Hole opener bit
Rock thread bit (R22, R25, R28, R32, R35, R38, T38, T45,T51,
Extension Rod, M/F Rod, M/m Rod, Drift Rod,
Shank adapter, coupling sleeves and all kinds of adapters
Compared with the oversea brands, our advantages are bellowing:
a. Our products can match over 95% against the original products
b. Price are competitive against the famous brands and best quality
against the small factory
1. Our factory has been specialized in manufacturing drilling tools
and spare parts for over 10 years.
2. We have advanced technology and equipment.
3. Our technician has more than 13 year’s professional working
4. Rock drilling tools are exported throughout the world. Main
market: Norway, Turkey, USA, Canada, Australia, Brazil, Uruguay,
Iran, Philippines, Thailand, India, etc.