Construction Drilling

The shuttering earth is thundered upon by the impossibly strong spinning of human being's most awesome arsenal of earth eviscerating equipment. These heavy duty machines munch through whatever stands in their way like a giant monster snacking on a bowl of corn flakes. The earliest drills were bow drills which date back to the ancient Harappans and Egyptians. The drill press as a machine tool evolved from the bow drill and is many centuries old. It was powered by various power sources over the centuries, such as human effort, water wheels, and windmills, often with the use of belts. With the coming of the electric motor in the late 19th century, there was a great rush to power machine tools with such motors, and drills were among them. The invention of the first electric drill is credited to Arthur James Arnot and William Blanch Brain, in 1889, at Melbourne, Australia. Wilhelm Fein invented the portable electric drill in 1895, at Stuttgart, Germany. In 1917, Black & Decker patented a trigger-like switch mounted on a pistol-grip handle. This sound uses the following file from Freesound: http://www.freesound.org/samplesViewSingle.php?id=117823