17 Rock Drilling T ools 800 8726899 Brunner Lay Face Style Applications Designation Standard X For use in moderately abrasive or seamy broken rock conditions X0 HIDuty X For use in extremely abrasive rock and a longer carbide life is desired as above Z0 Crown For use in general applications C0 H0 Drop Center For use in medium to hard rock applications where a straight hole is ideal D0 Flat Face For use in hard to very hard rock applications FA F4 Body Style Retrac Drop Center Flat face styles are available in a retrac body for straighter holes and to facilitate the bits removal from the hole DW FW Pr oduction Drilling Choosing the right bit Many factors go into choosing the correct bit for your ground conditions and drilling practices Production demands have changed the drilling industry over the past twenty years most of the pneumatic hammers have been replaced by the harder hitting faster drilling hydraulic hammers W e are constantly improving our manufacturing practices to produce bits that withstand the new machines With our experience in the rock drilling industry we can suggest products in various styles and confgurations for your particular rock drilling application 4wing 3wing