Down the Hole Hammers

Choose Shank Diameter:

Made in USA

Drill Bit Head Designs


Suitable for most drilling applications, particularly hard, abrasive rock to give a combination of speed and good service life.

Flat Face

Used for general purpose drilling.  The flat face design is considered effective in very broken ground as well as hard formations that tend to overdrill.


The concave bit design is an excellent all around bit, suitable for soft and hard formations.  The cone shaped face design provides good stability during drilling, allowing for straighter holes while redicing equipment vibration.  The carbide configuration design gives added penetration in many formations.

Extra Gauge Support

Providing similar performance to the concave bit design, the Extra Gauge Support is designed to provide excellent gauge row carbide protection in highly abrasive and hard formations.  The design also gives added gauge row protection while drilling through rock seams and changes in rock hardness.

Tungsten Carbide Insert Designs

Mincon can offer a combination of insert shapes in each bit to more precisely match the ground conditions to be drilled.  A choice of insert size is offered on bits to suit particular rocks.


Tough shape for hard abrasive rock and deep hole drilling.  Can be used in all applications.


Big chip producer.  Ideal for less abrasive sedimentary deposits where speed is vital.  Less suited to badly broken ground and hard rock.


A combination design to provide increased speed over the Dome design and with greater wear characteristics than Ballistic designs. Less suited to broken ground.


Suitable for sedimentary and broken rock conditions.

Double Dome

The design combines the toughness of the dome Carbide with an additional smaller dome that gives added wear as well as an increase in peneration rate due to the some what ballistic shape.