Numa Releases New HDD Range


Numa, the world’s leading drilling technology provider, has released a range of HDD Drilling Systems designed for productive and efficient drilling in hard rock and fractured ground formations.

Numa has a long history of serving the HDD market and with our range of Drilling products we enhance our ability to serve our customers with the right products for the job,” said Numa President, Ralph Leonard. “Our high quality, Made in the USA HDD products provide the right balance of performance and dependability without sacrificing tool life.”

Numa’s HDD Drilling Systems consist of a variety of HDD components including hammers, bits, side load sonde housings, bent subs, and adaptors which are capable of drilling holes 4″ to 7-1/2″ (102 mm to 191 mm) in diameter.  Some of the many benefits of our HDD products include: improved steerability, fast penetration rate, simplified field maintenance, reduced air requirements, and lower overall cost per foot.

With deep experience in rock drilling, we purposely designed our HDD hammers to drill longer in difficult rock conditions. Furthermore, a single bore design allows for a maximum bore diameter in conjunction with providing optimum life against abrasion. The full line of Numa’s HDD Drilling Systems is made up of the models indicated below with a full description on our website product page.

  • HDD 35 for drilling holes 3-7/8” to 4” (98 mm – 102 mm) in diameter
  • HDD 40 for drilling holes 4-3/4” to 5” (121 mm – 127 mm) in diameter
  • HDD 50 for drilling holes 5-3/4” to 6-1/8” (146 mm – 156 mm) in diameter
  • HDD 60 for drilling holes 7″ to 7-1/2″ (178 mm – 191 mm) in diameter

Our HDD Drilling Systems will be featured at ICUEE 2019, happening October 1-3 in Louisville, Kentucky.  Please stop by booth #1905 to discuss the HDD product line with our drilling experts.


Numa is the world’s leading drilling technology provider, dedicated to ongoing product innovation and results-oriented consistency. We’ve built a strong legacy of high quality, U.S. made DTH hammers and bits for drilling holes 3½ -50½ inches (89 -1283 mm) in diameter. With over 100 DTH hammer and bit products serving 11 different industries, our products are capable of drilling vertical, horizontal, and reverse circulation holes in hard rock and unconsolidated formations.