A hammer drill, also called a percussion drill or impact drill, is a power tool for drilling through hard materials such as concrete and brick. It combines ordinary rotary drilling with a hammering mechanism that delivers rapid, short hammer thrusts to pulverize the material as it drills, cutting through masonry faster and with less effort than a plain rotary drill; tests have found the hammer action can speed drilling in concrete by upwards of thirty percent. Many hammer drills let the user switch the hammer action off, turning the tool into an ordinary drill for driving screws or drilling wood and metal. This description is adapted from Wikipedia contributors under CC BY-SA 4.0; changes were made. https://creativecommons.org/licenses/by-sa/4.0/
Facts
OriginOrigin contested. Precursors include ancient Chinese percussive drilling from the Han dynasty and an 1848 pneumatic percussion drill by J.J. Couch. German manufacturer Fein patented an electro-pneumatic hammer drill in 1914; Bosch began mass production of the Bosch-Hammer around 1932; mining engineer J. George Leyner separately developed hammer drills for mining use in the same period. 1 Introduced era (class) Disputed
Introduced When (Circa)The origin of the first hammer drill is contested; ancient Chinese percussive drilling and an 1848 pneumatic percussion drill by J.J. Couch are earlier precursors to the 1914 Fein patent cited here. In the Other Atlases
Sources
1. Hammer drill (Wikipedia)
Wikimedia FoundationHistory section, paragraph on Fein 1914 patentQuote, History section, paragraph on Fein 1914 patent
The origin of the first hammer drill is a matter of contention. German company Fein patented a Bohrmaschine mit elektro-pneumatischem Schlagwerk ("drill with electro-pneumatic striking mechanism") in 1914.
Reader Challenges (0)
No disputes yet. Spotted an error or a better source? Open the first one.
Sign in to dispute this or suggest a correction.