The World's Leaders in Rock Drilling Equipment

Patriot, Champion and Challenger Hammers
Made in the USA

Down The Hole (DTH) Hammers, Drills and Bits

Numa is the world’s leading designer, manufacturer, and US provider of drilling equipment with the best rock drilling hammers and equipment for drilling holes from 3½ – 50½ inches (89 – 1283mm) in diameter

Down The Hole Hammers

Down the hole hammers, usually called DTH, are basically a mini jackhammer screwed on the bottom of drill strings. The fast hammer action breaks hard rock into small flakes and dust and is blown clear by the air exhaust from the DTH hammer bits. DTH drills are one of the fastest ways to drill hard rock. It was only when down the hole hammers came along that many of the problems associated with the other systems were overcome – with the DTH system the energy source is constantly behind the drill bit with copious amounts of air passed through the drill string to operate the DTH Hammer which is then used to efficiently flush the bore hole clean.

Numa DTH products are designed to drill holes in hard rock, overburden, or loose strata formations in many different types of drilling applications. These markets are commonly found in the construction, oil & gas, mining, quarry, geothermal, water well, horizontal and other rock drilling industries. Operators of DTH products drill holes from a few feet to 1000’s of feet deep. In fact, one of the deepest holes on record was drilled to 17,600 feet (5364 m) below the surface.

Our commitment gives our customers the peace of mind that we’ll always be the leader in rock drilling with the industry’s best performing, most reliable DTH rock drilling products and the industry’s best service and support.

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    Precision Engineering

    Numa offers one of the largest ranges of down the hole hammers, made in USA drills, large diameter drills, drill bits, large diameter bits, hammer bits, and best rock drilling bits available in the drilling industry today. You can be sure when looking at drilling manufacturers that we have the best DTH hammer and drilling tools to meet your construction drilling needs with the best rock drilling bits.

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    Exceptional Customer Support

    With a dedicated field staff traveling to drill sites around the world, an expert sales team, and in-house engineers, we are capable of delivering your exact DTH drilling tool and quality dth products–anywhere in the world to fit your horizontal drilling, horizontal directional drilling, or drilling and casing at same time needs.

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    Innovative Solutions

    Numa consistently conducts research and development in order to improve drilling technologies for the future. We are US makers of drilling equipment that continue to be instrumental in the development of new technology.

Numa Technology Around the Globe

See Us in Action

With nearly half of our sales overseas, Numa products are at work on every continent and tough job site there is.


Recent News

Numa Exhibiting at Groundwater Week
November 1, 2018

THOMPSON, CONNECTICUT USA Numa, the world’s leading drilling technology provider, will be exhibiting at Groundwater Week being held December 3 – 6 in Las Vegas,…

Numa Attending 2018 Geofluid
September 1, 2018

THOMPSON, CONNECTICUT USA Numa, the world’s leading drilling technology provider, will be attending 2018 Geofluid taking place in Piacenza, Italy on October 3 – 6,…

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