T51 115mm Flat Face Retrac Skirt Button Bits Well Drilling

Thread button bits

1. Thread connection: R25, R28, R32, R38, T38, T45, T51, ST58, GT60 and ST68.

2. Carbide profile: Spherical, ballistic and parabolic.

3. Bit Faces: flat, concave, convex and drop-center, uniface.

4. Bits Diameters: 33mm-152mm

5. Bit body: standard and retrac

Thread drill bits T51 102mm rock drilling button bit

Product Description:

Remarks:
Hemispherical-66(Usually for very hard rocks)
Ballistic-65(Ususally for medium hard rocks)
Semiballistic-64(Usually for medium hard rocks)
Conical-67(Usually for soft rocks)

Extension rod / MF rod

Other names are Extension drill steel, Extension drill rod, and Extension steel, M/F rod (Speed rod), produce Hexagonal and round cross-sections. Hexagonal rods are more rigid, heavier and transfer energy more efficiently, while increasing flushing. Round rods are generally lighter than hexagonal rodsand are normally used in extension drilling applications. With the longer steel tending to be larger in diameter, conventional extension steel is characterizedby duplicate thread on each end of the steel.
Extension rods are made by hollow drill steels, different lengths are available from 600mm to 6400mm. 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 adapters or bits.

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