On January 8, 1851, construction began on a 4.75-mile-long railroad tunnel, at the time the longest in North America and second-longest in the world, under Hoosac Mountain in Massachusetts. To tunnel ...

Chesterfield Resources is pleased to announce that it has commenced a percussion drill programme on its Troodos West copper/gold exploration region in Cyprus. The company is drilling on a number of ...

A nylon bearing-swell problem almost led to the abandonment of a project to develop a new percussion hammer drill until the drill maker turned to Vesconite Hilube no-swell wear-resistant bearings. The ...

The South Hagerstown High School Indoor Percussion Ensemble won the Keystone Indoor Drill Association Championship for Scholastic Gold Moving Percussion on Saturday at Chambersburg (Pa.) Area Senior ...

Throughout the history of drilling, “Heavy Metal” (not to be confused with the music genre) has been the preferred cutting element for grinding/crushing/chipping formations on literally the leading ...

Scientific American is part of Springer Nature, which owns or has commercial relations with thousands of scientific publications (many of them can be found at www ...

A hammer drill is a tool that has a back-and-forth hammering action as well as a clockwise or anti-clockwise drilling action. They can do jobs regular drills are not suitable for, such as drilling ...