Horizontal Directional Drilling (HDD) Systems

Rock Hammers, Drills and Bits

Hammer Bits

Numa’s HDD hammers and HDD Bits product line and drilling experts provide the perfect combination for productive and efficient horizontal directional drilling in hard rock and fractured ground formations.  While we offer a full arsenal of HDD hammers and bits capable of drilling  holes 3-7/8″ to 7-1/2″ (98 mm to 191 mm) in diameter, we also offer a variety of HDD components including side load sonde housings, bent subs, and adaptors.  Some of the many benefits Numa provides HDD drillers include:

• Industry leading steerability
• Outstanding rate of penetration
• Simple design of rock bits allows for field maintenance
• Reduced air requirement results in lower cost per foot
• More efficient and durable internal design
• High frequency operation of rock drills provides less vibration

All Numa HDD hammers and bits are constructed from Made in the USA, premium steel allowing rock drills to use our products longer than competing brands. Furthermore, the single bore design allows for a maximum bore diameter in conjunction with optimum life against abrasion. Quite simply, the Numa HDD product line provides performance and dependability without sacrificing tool life. Our full line of HDD hammer bits includes:

• HDD 35 for drilling  holes 3-7/8” to 4” (98 mm – 102 mm)

• HDD 40 for drilling  holes 4-3/4” to 5” (121 mm – 127 mm)

• HDD 50 for drilling  holes 5-3/4” to 6-1/8” (146 mm – 156 mm)

• HDD 60 for drilling  holes 7″ to 7-1/2″ (178 mm – 191 mm)

View The Product Brochures

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Use the following form to request access to the product brochures. If you have any questions, please contact us and we will be happy to assist you.