Sandvik reveals faster and more accurate drilling system

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Watch the video to see how the new Alpha 330 drilling system compares with the existing R32 system

Construction and mining equipment manufacturer Sandvik has introduced its new Alpha 330 drilling tool system as the more advanced alternative to its existing R32 connection system, offering better precision and reduced drilling costs.

According to Sandvik, the Alpha 330 delivers 30-80% longer rod life than the R32 system, which is the current dominant Ø45mm system to date.

Sandvik also claims the new system offers exact collaring and straighter holes compared to the R32 system - thus reducing drifting and tunnelling costs.

Sandvik Mining's Product Support Manager for Tophole and DTH drills Des Leonard says the new tool system has been developed to match the increased energy output from modern high-power rock drills in drifting and tunnelling applications.

"The Sandvik Alpha 330 drilling tool system has been designed to effectively control drilling power and, most importantly, ensure that it is transmitted into the rock as efficiently, accurately and economically as possible," he says.

Leonard says the drill string rod/bit connection features an entirely new thread design.

"A shorter thread on the hexagonal rods in the tool system results in a rigid, integrated power pack drill string with superior resistance to bending stresses, securing perfect energy transfer," he says.

"This sturdy thread design is well guided inside the bit skirt, offering higher precision in collaring-even in complex rock formations and uneven surfaces."

Leonard says more steel for higher fatigue strength ensures a more rigid connection compared with the R32, resulting in exact collaring and straighter blastholes  hence delivering a 30-80% increase in rod life.

"The result is in higher rates of advancement, improved profile-control and a further reduction in the overall cost of drifting and tunnelling through Sandvik Mining Technology," he says.

According to Leonard, the Alpha 330 system takes advantage of an inherently stronger and more rigid R33 thread with a significantly larger cross-section than the R32, making it proportionately stronger.

"To further improve rigidity, Sandvik has introduced a new guiding function between the rod and bit-skirt, immediately behind the thread," he says.

Leonard adds the Alpha 330 rod cross section over the guide is 36% larger than on the R32 at the rear of the connection therefore greatly improving the rigidity of the joint.

"After the bit skirt, the rod cross-section increases to Hex-35 quickly and smoothly," he says.

"The sturdy thread is well guided inside the bit skirt, offering high precision in collaring - even in complex rock formations and uneven surfaces.

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