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Numa launches new hammer backhead

Numa, a manufacturer of down-the-hole (DTH) hammers and bits, has released a vortex backhead design aimed at improving drilling performance and hammer/bit life

Staff reporter
Numa's new vortex backhead design for DTH hammers

Numa's new vortex backhead design for DTH hammers

Typically when water is injected into the air supply of a conventional backhead, the water will travel through all hammer components and exhaust out the bottom of the bit to improve hole cleaning. Water...

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