Perhaps around 1818. Interestingly, that is disputed, since others may have made similar inventions around 1814, and the one credited as having been made in 1818 may have been made in 1825.
Eli Whitney milling machine was invented in 1818
Eli Whitney
1998 =)
1881
$15 at that time that was about 600 for us
Eli Whitney invented many things. The most common was his cotton gin. He also invented interchangeable parts and the milling machine
engineering
It appears that in 1816 The Milling machine was invented to reduce hand filing of intricate shapes. (Simeon North, Harpers Ferry Armory USA) Later, in 1818, Whitney invented the first milling machine." From another source. A bit later in 1818 Eli Whitney (inventor of the cotton gin) invents a milling machine in New Haven Connecticut. Prior to the milling machine being invented, a machinist's tools were primarily files and required a highly skilled operator. The milling machine allowed a less skilled operator to make the same quality of parts as the skilled operator with the file. This milling machine found use making rifles for the government.
cotton gin musket milling machince
cotton gin musket milling machince
No Eli Whitney did not invent the violin, but Eli Whitney did make his own violin when he was 12 years old.
Eli Whitney's