A new top hammer tool system is designed to increase efficiency and reduce costs by saving fuel and simplifying automated drilling in surface bench and underground longhole applications.

The multi-patented solution from Sandvik is said to feature a first-of-its-kind curved thread design which reduces stress levels by distributing them over a larger area inside the tool. This enables 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,” says Sandvik VP: Product Line Top Hammer Anders Brungs. “Our design increases productivity by 15% while reducing fuel consumption by 15%, as faster drilling means less flushing time.”

The curved thread CT system is designed to increase drilling productivity and reduce costs both underground and on the surface.

“Surface drill rigs have much more power than current standard tools can handle,” says Sandvik product manager: Top Hammer Surface Tools Fredrik Björk. “This means the full potential of the drill rig cannot be used. 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 optimised system that includes the drill rig, the rock drill and the rock tool. The CT system also brings out the full potential of Ranger DXi and Pantera DPi rigs.”

The higher productivity of the CT systems can be reached with more aggressive settings for parameters like percussion, rotations and feed.

“Trouble-free drilling is key when operating underground,” says Sandvik product manager: Top Hammer Underground Tools Robert Grandin. “In addition to higher productivity and lower cost, the extended service life of our CT system will be especially important for underground operations where tool breakages create frustration and interruptions. The stronger geometry that comes with the curved thread design boosts tool service life by more than 30%. The curved design also makes the CT system automation-ready, since easy coupling and uncoupling in itself is an important enabler for automation, a vital technology in many underground operations.”