A beam of energy hit the slab of rock, which quickly began to glow. Pieces cracked off, sparks ricocheted, and dust whirled ...

In the end even the gearbox had to be modified for higher speed. The finished drill sure looks and sounds terrific, ... the electric drills used to motorize the base are extremely loud.

There are few projects on how to make your own cordless drill, but what sets [Johnnyq90’s] amazing project apart is the fact that his power plant is a nitro engine. Not an easy task of course… ...

Hard rock mining equipment manufacturer Sandvik is working with Swedish mining company Boliden AB to test and develop a new, battery electric surface drill rig concept at Boliden’s Kevitsa mine.

Portable electric drills didn’t always look like oversized handguns. Before Alonzo G. Decker and Samuel D. Black intervened in the 1910s, the machines typically required the use of both hands.