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extension rods made with high quality of best quality alloy steel bar. - details see: https://www.machineto.com/maxdrill-drifting-drill-rod-extension-rod-10317368

—MAXDRILL Drifting Drill Rod/ Extension Rod

Extension 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/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. The advantages of drilling with M/F steel include: easy handling, quicker uncoupling, tighter connections, the potential to drill straighter holes, and longer service life.

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. Longer steel larger in diameter, conventional extension steel, Hexagonal and round cross sections are available.

- 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.

Extension rod size

R32-Round32-R32 length 3 4 6 8 10 12 ft

T38 (R38) –Round39-T38 (38), length 4’ 6’ 10’ 12’ft

T45 -Round46-T45, length 10’ 12’ 14’ 20’ ft

T51 -Round52-T51, length 12’ 14’ 20’ ft

MF rod /speed rod size

MF-rod R32-Round32-R32, length 3 4 5 6 10 12 14 ft

MF Rod T38-Round39-T38, length 4 5 6 10 12 14 ft

MF Rod T45-Round46-T45, length 5 6 10 12 14 20 ft

MF Rod T51-Round52-T51, length 6 12 14 20 ft

MF Rod ST58-Round60-ST58, length 12 14 20 ft

(1)Steel grade: 20CrNi3Mo equivalent to SANDBAR 64

SIZE: hex.22mm .hex.25mm, hex.28mm. hex.32mm hex.35mm

Dia.32mm. dia.38mm, dia.45mm dia.51 mm

(2) Thread: R22, R25, R28, R32, R38, T38, T45, T51, ST58, T60

(3)Length: 0.4m-10m

(4)Package: in wooden case or in bundles.

(5)Productivity: 20000MT / month

Based in China,Maxdrill Rock Tools Co Ltd is an ISO 9001:2008-certified manufacturer of high quality, competitively-priced rock drilling tools, as well as self-drilling rock bolts and accessories.Thanks to our highly efficient management and technological innovation, we have successfully gained the approval of our clients and the international market.

Owing to supply energy-saving,economical,effictive products,we become one of the most credible Chinese manufacturers in drilling industry.MAXDRILL ROCK TOOLS satisfy our clients with SAVING YOUR PURCHASING COST and SAVING MORE USAGE COST.

Our special tailored-made is waiting for you upon your demand.