Thread Hexagonal T38 T45 T51 Gt60 EL60 Mf mm Extension Drifter Speed Drill Rod for Drifting and Tunnelling

Product DescriptionExtension rods are made by hollow drill steels; there are two shapes of extension rods, round type and hexagonal type. 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.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)Steel grade: Male-Male Rod, MF 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.(5)Productivity: 20000MT / monthHEX EXTENSION RODR22 - R22 - HEX 22     7/8" ROPE THREAD (22mm) X 7/8" HEX (22mm) ROD CROSS SECTIONLENGTH (L)THREADmmFTLifitRightHEX 226102'R22R22HEX 229153'R22R22HEX 2212204'R22R22HEX 2215255'R22R22HEX 2218306'R22R22     R25 - R25 - HEX 25     1" ROPE THREAD (25mm) X 1" HEX (25mm) ROD CROSS SECTIONLENGTH (L)THREADmmFTLifitRightHEX 25 6102'R25R25HEX 25 9153'R25R25HEX 25 10003' 3"R25R25HEX 25 12204'R25R25HEX 25 15004' 11"R25R25HEX 25 15255'R25R25HEX 25 18306'R25R25HEX 25 21006' 10-1/2"R25R25HEX 25 24358'R25R25HEX 25 305010'R25R25HEX 25 366012'R25R25HEX 25 430514' 1-1/2"R25R25     R28 - R28 - HEX 28     1-1/8" ROPE THREAD (28mm) X 1-1/8" HEX (28mm) ROD CROSS SECTIONLENGTH (L)THREADmmFTLifitRightHEX 286102'R28R28HEX 289153'R28R28HEX 2812204'R28R28HEX 2815255'R28R28HEX 2818306'R28R28HEX 2824358'R28R28HEX 28305010'R28R28HEX 28366012'R28R28HEX 28370012' 1-1/2"R28R28HEX 28400513' 1-1/2"R28R28     R32 - R32 - HEX 32     1-1/4" ROPE THREAD (32mm) X 1-1/4" HEX (32mm) ROD CROSS SECTIONLENGTH (L)THREADmmFTLifitRightHEX 3215004' 11"R32R32HEX 3223507' 8-1/2"R32R32HEX 3224758' 1-1/2"R32R32HEX 3227008' 10"R32R32HEX 32309010' 1-1/2"R32R32HEX 32340011' 2"R32R32HEX 32370012' 1-1/2"R32R32HEX 32400513' 1-1/2"R32R32HEX 32430514' 1-1/2"R32R32HEX 32491516' 1-1/2"R32R32HEX Drifter rodR25 - R32 - HEX 25     1" ROPE THREAD (25mm) X 1-1/4" ROPE THREAD (32mm) X 1" HEX (25mm) ROD CROSS SECTIONLENGTH (L)THREADmmFTLifitRightHEX 256102'R32R25HEX 2518306'R32R25HEX 2521307'R32R25HEX 2524758' 1-1/2"R32R25HEX 2526008' 6"R32R25HEX 2527959' 2"R32R25HEX 2528959' 6"R32R25HEX 25309010' 1-1/2"R32R25HEX 25370012' 1-1/2"R32R25HEX 25400513' 1-1/2"R32R25HEX 25430514' 1-1/2"R32R25     R25 - R32 - HEX 28     1" ROPE THREAD (25mm) X 1-1/4" ROPE THREAD (32mm) X 1-1/8" HEX (28mm) ROD CROSS SECTIONLENGTH (L)THREADmmFTLifitRightHEX 2824758' 1-1/2"R32R25HEX 2826008' 6"R32R25HEX 2827959' 2"R32R25HEX 2828509' 4"R32R25HEX 28309010' 1-1/2"R32R25HEX 28370012' 1-1/2"R32R25HEX 28400513' 1-1/2"R32R25HEX 28430514' 1-1/2"R32R25     R25 - R38 - HEX 28     1" ROPE THREAD (25mm) X 1-1/2" ROPE THREAD (38mm) X 1-1/8" HEX (28mm) ROD CROSS SECTIONLENGTH (L)THREADmmFTLifitRightHEX 2820006' 7"R38R25HEX 28309010' 1-1/2"R38R25HEX 28370012' 1-1/2"R38R25HEX 28405013' 3-1/2"R38R25HEX 28430514' 1-1/2"R38R25     R28 - R32 - HEX 28     1-1/8" ROPE THREAD (28mm) X 1-1/4" ROPE THREAD (32mm) X 1-1/8" HEX (28mm) ROD CROSS SECTIONLENGTH (L)THREADmmFTLifitRightHEX 2812204'R32R28HEX 2815255'R32R28HEX 2824758' 1-1/2"R32R28HEX 2825908' 6"R32R28HEX 2827959' 2"R32R28HEX 28309010' 1-1/2"R32R28HEX 28340011' 2"R32R28HEX 28370012' 1-1/2"R32R28HEX 28400513' 1-1/2"R32R28HEX 28430514' 1-1/2"R32R28     R28 - R38 - HEX 28     1-1/8" ROPE THREAD (28mm) X 1-1/2" ROPE THREAD (38mm) X 1-1/8" HEX (28mm) ROD CROSS SECTIONLENGTH (L)THREADmmFTLifitRightHEX 2824758' 1-1/2"R38R28HEX 28309010' 1-1/2"R38R28HEX 28370012' 1-1/2"R38R28HEX 28430514' 1-1/2"R38R28     R28 - T38 - HEX 28     1-1/8" ROPE THREAD (28mm) X 1-1/2" TRAPEZOIDAL THREAD (38mm) X 1-1/8" HEX (28mm) ROD CROSS SECTIONLENGTH (L)THREADmmFTLifitRightHEX 2824758' 1-1/2"T38R28HEX 28309010' 1-1/2"T38R28HEX 28330010' 10"T38R28HEX 28370012' 1-1/2"T38R28HEX 28430514' 1-1/2"T38R28     R28 - R38 - HEX 32     1-1/8" ROPE THREAD (28mm) X 1-1/2" ROPE THREAD (38mm) X 1-1/4" HEX (32mm) ROD CROSS SECTIONLENGTH (L)THREADmmFTLifitRightHEX 32309010' 1-1/2"R38R28HEX 32370012' 1-1/2"R38R28HEX 32400513' 1-1/2"R38R28HEX 32430514' 1-1/2"R38R28HEX 32491516' 1-1/2"R38R28HEX 32552518' 1-1/2"R38R28     R28 - T38 - HEX 32     1-1/8" ROPE THREAD (28mm) X 1-1/2" TRAPEZOIDAL THREAD (38mm) X 1-1/4" HEX (32mm) ROD CROSS SECTIONLENGTH (L)THREADmmFTLifitRightHEX 3224758' 1-1/2"T38R28HEX 32309010' 1-1/2"T38R28HEX 32340011' 2"T38R28HEX 32370012' 1-1/2"T38R28HEX 32430514' 1-1/2"T38R28HEX 32491516' 1-1/2"T38R28HEX 32515016' 10-3/4"T38R28HEX 32552518' 1-1/2"T38R28     R32 - R38 - HEX 32     1-1/4" ROPE THREAD (32mm) X 1-1/2" ROPE THREAD (38mm) X 1-1/4" HEX (32mm) ROD CROSS SECTIONLENGTH (L)THREADmmFTLifitRightHEX 3215705' 2"R38R32HEX 3218005' 11"R38R32HEX 3222007' 2-1/2"R38R32HEX 3224758' 1-1/2"R38R32HEX 32309010' 1-1/2"R38R32HEX 32370012' 1-1/2"R38R32HEX 32400513' 1-1/2"R38R32HEX 32430514' 1-1/2"R38R32HEX 32461015' 1-1/2"R38R32HEX 32491516' 1-1/2"R38