MTI’s Blast Hole Drill Steel both fabricated and integral designs are tailored to the
particular drill and drilling Conditions. Our fabricated drill steel features tool joints made
from steel selected for each application and are inspected by ultrasonic means to assure
product quality. Wrench slots or flats are milled to suit the requirements of the drill. All
rotary-shouldered connections are kemplated to protect against galling during the break-in period. Heavy wall construction and optional hardfacing results in longer life and
lower cost.
Our Integral Drill Steel is made from premium quality alloy steel bars, and bores are trepanned to sizes that result in proper balance for the selected rotary shouldered connection. Integral Drill Steel is available step-bored to reduce weight while concentricity and axial
alignment of the connections to the drill steel are held to close
machine tolerance. Wrench slots or flats are milled to suit the requirements of the drill.
Application of tungsten carbide hard-facing is available to protect both fabricated and integral designs from abrasion and erosion. Our MTI representatives are available to
study your needs and select the proper drill steel and rotary connections for your particular application.