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 by most professionals, 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, the drill tubes are rigid being only slightly less in diameter than the drill bit, copious amounts of air can be passed through the drill string to operate the horizontal drilling DTH Hammer which is then used to efficiently flush the bore hole clean. Horizontal directional drilling DTH drilling tools did not require heavy down thrusts or high rotational speeds and as such a light, cheap machine could be employed to carry out the drilling process – the machine could also be worked by one man, whereas some other systems required two operatives.

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 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,…

Numa Updates Privacy Policy
June 4, 2018

THOMPSON, CONNECTICUT USA – Numa has recently updated our Privacy Policy to comply with the new General Data Protection Regulation (GDPR). The GDPR is the European Union’s…

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