DTH Drill Bits - Drill King International

Drill King bits: the tip of the spear

Whether it’s breaking new ground, enlarging an existing hole, directional drilling, or installing casing, Drill King provides bits for almost any DTH drilling application. Manufactured from ultra-high-strength steel and premium tungsten carbide, with gage diameters from 2-¾” (70 mm) all the way to 42″ (1067 mm).

DTH Bits

Drill through the harshest geology with endless configurations.

DTH Hole Openers

Increase the diameter of an existing hole.

DTH Directional Bits

Drill with steerability.

DTH RC Bits

Explore new formations and collect samples with reverse-circulation drilling.

DTH Casing Drivers

Install casing with ease.

Custom Solutions

Face profile, carbide grades, carbide shape, flushing design, and wear treatments tailored to your specific ground conditions and project requirements.

Fast Delivery Times

Popular sizes kept in stock and semi-finished condition to minimize lead time.

Innovative Designs

Each design is engineered for reliable performance with optimized button and flushing layouts.

Shank Support

Bits made with almost any shank style and hammer size in the industry.

High-Quality Materials

All bits are made with ultra-high-strength steel and premium carbide buttons for maximum durability.

Massive Size Range

We manufacture bits from 2-¾" to 42" (70–1067 mm), covering everything from exploration to large foundation piles.

Bit Type	Function	Common Applications	Size Range	Stock Availability
DTH Air Bit	Drills a hole in fresh ground. Powered by a DTH air hammer.	Most drilling applications.	2-¾" – 42" (70 – 1067 mm)	Most popular sizes kept in stock
DTH Water Bit	Drills a hole in fresh ground. Powered by a DTH water hammer.	Precision holes, deep holes, sensitive geologies, urban or underground environments. Low noise and dust.	2-¾" – 16" (70 – 406 mm)	Select sizes kept in stock
DTH Hole Opener	Enlarges an existing hole to final diameter.	Bringing a hole to intended size following a smaller exploratory hole.	6" – 42" (152 – 1067 mm)	8" / 10" / 12" (203 / 254 / 305 mm) in stock
DTH Directional Bit	Drills a hole in fresh ground with the ability to steer.	Horizontal directional drilling (HDD), underground utility lines.	2-¾" – 10" (70 – 254 mm)	Made to order
DTH RC Bit	Drills a hole in fresh ground. Powered by an RC DTH hammer. Air flows from the annulus into the bit (opposite of typical drilling).	Collecting geological samples from exploratory drilling.	4" – 6" (102 – 152 mm)	Made to order
DTH Casing Driver Bit	Pushes casing into an open hole past residual resistance, or drives casing directly into soft, fresh ground.	Installing casing into a drilled hole. Driving casing directly into soft ground.	2-¾" – 42" (70 – 1067 mm)	Made to order

What’s the difference between a standard DTH bit and a hole opener?

A standard DTH bit drills a hole in fresh ground. A hole opener enlarges an existing hole.

Note: Standard bits used to enlarge existing holes are much more prone to failure due to instability and overloading of the gage row.

When would I need a casing driver bit instead of a standard DTH bit?

In most cases, the casing driver bit is a secondary tool used in addition to a standard bit. The standard bit drills the hole, and then the casing driver is used to push casing past resistance in the borehole.

If borehole collapse is a significant issue, try a DKI casing advance system.

In limited contexts with very soft geology, casing drivers can be used to drive casing directly into fresh ground.

Can DTH drill bits be customized for my ground conditions?

Yes. Drill King offers extensive customization, including various head profiles, button quantity, button shape, premium or diamond-impregnated carbide, side wear pads, back-reaming buttons and much more to match your specific formation.

What materials are DKI’s DTH bits made from?

All DKI bits are manufactured from ultra-high-strength steel and high-quality tungsten carbide, with diamond-enhanced carbide available for the most demanding conditions.

Will a Drill King bit work on my hammer?

All DTH bit types can be interchanged on a hammer with a matching shank style.

Tell us your ground conditions, hole size and hammer, and we’ll recommend the right bit.