“Our latest tools feature application-focused cutting structures and are more effective and hard wearing than their predecessors,” said Simon Mitchell, vice president rotary tools at Sandvik Mining. They have better longevity thanks to multiple design improvements, where we have matched our proprietary Sandvik cemented carbide shapes and grades to specific drilling conditions. This will help to reduce wear and breakage, further increasing bit life and improving penetration rates.”
Sandvik RR221 sizes range from 159 to 311 mm (6 ¼ to 12 ¼ in.) and rock hardness capability from 10 MPa to more than 500 MPa. Now equipped with the patented Sandvik RR221 bearing, these bits offer high bearing hours and a low cost per drilled meter in a wide range of applications.