T38 Thread Drill Rod
T38 drill rod, other names are extension drill steel, extension
drill rod, and Extension steel, M/F rod (Speed rod).
Two Type: 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 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 the 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 is usually named flushing hole, used for
transmitting water or air during drilling.
And the threads can be used for connecting couplings, shanks
adapters or button bits.
Extension rods Specification:
T38-Round39-T38,
length1220mm/1525mm/1830mm/2435mm/3050mm/3660mm/3965mm/4270mm/4880mm/5530mm/6095mm
Double thread extension rods, T38-Round39-T38, length 3050mm/3660mm
MF rods, T38-Round39-T38,
length915mm/1220mm/1525mm/1830mm/3050mm/3660mm/4270mm/4880mm/5530mm/6095mm
Guide speed rods, T38-Round46-T38, length
1830mm/3050mm/3660mm/4270mm/4880mm/5530mm/6095mm
Guide tube, T38-Round56-T38, length
1220mm/1525mm/1830mm/3050mm/3660mm/4920mm
Hex extension rods, T38-Hex32-T38, length
1220mm/1830mm/2435mm/3050mm/3660mm
Drill rod using T38 threaded system.
Drilling precision can be further improved by using this as the
first rod in a normal drill string.
Furthermore, since this is a speed rod design it will produce
straighter holes and at least 10% higher penetration rate in good
rock conditions compared to rod and coupling sleeve combination
system.
