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Jan 21, 2018 · the first steps to good performance and service life when drilling with dth equipment is to have a balanced system – air supply, hammer and bit; the picture below left one is bad balanced system which will lead to low penetration rate, and right one is good balanced system with perfect penetration rate . correct settings

Co-z large hss spiral groove step drill bit, 12 sizes titanium high speed steel 1/4" to 2-3/8" drill bit for sheet aluminium metal wood hole drilling, big multiple hole stepped up bit for diy lovers. 4.5 out of 5 stars 201. $33.99 $ 33. 99. get it as soon as mon, nov 9. …

We offer a complete range of dth drilling tools including hammers, bits, pipes, adapters, reverse circulation products, breakout benches and grinding machines with consumables. innovation and commitment over the decades the history of the down-the-hole hammer manufacturing goes back more than four decades.

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