A hammer drill, also known as a "rotary hammer", "roto-drill" or "hammering drill", (see also rotary drill) is a rotary drill with a hammering action. The hammering action provides a short, rapid hammer thrust to pulverize relatively brittle material and provide quicker drilling with less effort. These tools are usually electric powered, but increasingly are also seen running off of cordless battery technology. The same technology is also used in electric "demolition hammers", also known as "chipping guns" or "breakers".
Read more about Hammer Drill: Types of Hammer Drills: "Cam-Action" (Percussion) and "Electro-Pneumatic", Use, Rotary Hammers, History
Famous quotes containing the words hammer and/or drill:
“This Administration has declared unconditional war on poverty and I have come here this morning to ask all of you to enlist as volunteers. Members of all parties are welcome to our tent. Members of all races ought to be there. Members of all religions should come and help us now to strike the hammer of truth against the anvil of public opinion again and again until the ears of this Nation are open, until the hearts of this Nation are touched, and until the conscience of America is awakened.”
—Lyndon Baines Johnson (1908–1973)
“Swift blazing flag of the regiment,
Eagle with crest of red and gold,
These men were born to drill and die.
Point for them the virtue of slaughter,
Make plain to them the excellence of killing
And a field where a thousand corpses lie.”
—Stephen Crane (1871–1900)