New curved thread design boosts efficiency, reduces cost, saves fuel, and simplifies automated drilling
FEATURING an industry-first curved thread design, Sandvik’s new CT55 and CT67 top-hammer tool systems are the most advanced the company has launched. The special design is said to increase efficiency and reduce cost while saving fuel and simplifying automated drilling in both surface and underground applications.
The new, multi-patented, first-of-its-kind curved thread design from Sandvik reduces stress levels by distributing them over a larger area within the tool, allowing the system to handle higher drilling power and a drill rig’s full potential.
‘We are proud to offer an innovation that delivers significantly increased efficiency, since higher drilling parameters are allowed with fewer stops for breakages,’ said Anders Brungs, vice-president of Sandvik’s top-hammer product line. ‘Our design increases productivity by 15% while reducing fuel consumption by 15%, as faster drilling means less flushing time.’
Sandvik say the higher productivity of the new curved thread CT systems can be reached with more aggressive settings for parameters such as percussion, rotation, and feed.
‘Surface drill rigs have much more power than current standard tools can handle. This means the full potential of the drill rig cannot be used,’ explained Fredrik Björk, product manager for top-hammer surface tools at Sandvik.
‘Our new CT system radically increases the fatigue strength and we’ve also seen 30% longer tool life together with better hole precision in our product evaluation tests with early adopting customers. This is a fully optimized system that includes the drill rig, the rock drill, and the rock tool. The CT system also brings out the full potential of our Ranger DXi and Pantera DPi rigs.’
Sandvik’s new curved thread systems – the CT55 and CT67 for surface applications and the CT67 for underground mining – are available with drill bit diameters from 89–127mm on the CT55 and from 102–140mm on the CT67.