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Numa Releases Range of HDD Drilling Systems


Numa 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 HDD Drilling Systems we enhance our ability to serve our customers with the right products for the job,” said Numa President Ralph Leonard. “Our high-quality HDD products – made in the United States – 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-in. (102- to 191-mm) in diameter.  

Some of the many benefits Numa touts for the HDD hammer line include: improved steerability, fast penetration rate, simplified field maintenance, reduced air requirements and lower overall cost per ft.

With deep experience in rock drilling, Numa purposely designed their 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:

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

Numa, www.numahammers.com