Sandvik has launched new rotary drill bits, the RR221.
The new rotary blasthole bit runs on patented, modularized air bearing platform, minimising
spalling during sustained loads, and is capable of delivering 10-25 per cent longer bearing hours and life increase of up to 30 per cent, compared with the previous generation Sandvik RR220 range, the manufacturer said, resulting in lower drilling costs.
“Today it is more important than ever for our customers to maximise the value of their investments, and Sandvik RR221 delivers,” Simon Mitchell, VP for Rotary Tools at Sandvik Mining, said.
“Our latest tools feature application-focused cutting structures and are more effective and hard wearing than their predecessors," he said.
"They have better longevity thanks to multiple design improvements, where we have matched our 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.”
The new RR221 sizes range from 159 to 311 and have a rock hardness capability from 10 MPa to
more than 500 MPa.