Made in China Thread Drill Extension Rods for Mining

Model NO.: T38 T45 T51 R32 R38


Length: 0.4 - 6 M


Material: Carbon Steel


Type: Thread Rod


Body Type: Round, Hexagonal


Transport Package: Wooden Case


Origin: Xiamen, China




Certification: ISO9001


Usage: Coal Mining


Application: Drifting and Tunneling, Bench Drilling


Processing Type: Forging


Trademark: BESTLINK


Specification: ISO


HS Code: 72288000


Extension rods are made by hollow drill steels. This hollow hole are usually named flushing hole, used for transmitting water or air during drilling.

And the threads can be used for connecting couplings, shanks, couplings or bits.



Body Type:

There are two shapes of extension rods, round type and hexagonal type.

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.



Thread Type:

Usually for extension rods, there are R22, R25, R28, R32, R38, T38, T45, T51, ST58, T60 threads,

and different lengths of rods are available from 600mm to 6400mm usually.





(1) Type: Male-Male Rod, Male-Female Rod

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

(3) Rod size: hex. 22mm, hex. 25mm, hex. 28mm, hex. 32mm, hex. 35mm,

dia. 39mm, dia. 46mm. dia. 52mm

(3)Length: 0.4m-6m

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

Name	Size	Specification	Length
R25 Rod	Hex25	R25-Hex25-R25	610mm, 915mm, 1220mm, 1525mm,1830mm,2435mm, 3050mm, 3660mm
		R32-Hex25-R25	1830mm,2130mm,2475mm,2795mm,3090mm,3700mm
	Hex28	R32-Hex28-R25	3090mm, 3700mm
		R38-Hex28-R25
R28 Rod	Hex28	R32-Hex28-R28	2475mm,2590mm,3090mm,3700mm,4005mm,4305mm
		R38-Hex28-R28	3090mm, 3700mm,4305mm
R32 Rod	Hex32	R32-Hex32-R32	2475mm,3090mm,3700mm,4305mm
		R38-Hex32-R32	2475mm, 3090mm,3700mm, 4005mm,4305mm, 4610mm,4915mm
		T38-Hex32-R32	4305mm
	Hex35	R38-Hex35-R32	3090mm,3700mm,4305mm,4915mm,5525mm
		T38-Hex35-R32	3090mm,3700mm,4305mm,4915mm,5525mm,6135mm
		T38-Hex35-R32 MF-rod	3090mm,3700mm,4305mm,4915mm,5525mm,6140mm
	RD39	R38-RD39-R32	4305mm
		T38-RD39-R32	4305mm,4915mm,5525mm,6135mm

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