when and by whom bits for drill were invented?

Question

if you have links for more information,it will be better.thanks

Answer 1

The first drill bits were chipped from flint back in the stone age:
http://www.historicalfolktoys.com/catcont/6007.html

The augur bit goes back at least to the middle ages, and possibly much further:
http://en.wikipedia.org/wiki/Image:ADurerAugerBayonne.jpg

The twist drill bit, as the previous poster said, was invented by Steven Morse in 1861.

Answer 2

The twist drill bit was invented by Steven A. Morse[1] of East Bridgewater, Massachusetts in 1861. He received U.S. Patent 38,119 for his invention on April 7, 1863. The original method of manufacture was to cut two grooves in opposite sides of a round bar, then to twist the bar to produce the helical flutes. This gave the tool its name. Nowadays, the drill bit is usually made by rotating the bar while moving it past a grinding wheel to cut the flutes in the same manner as cutting helical gears.