Machinist School - Here's a Large Mill

Here you see Angle Plates bolted to the floor and Cassandra rides the head of the Giddings mill. You can work on some very large parts with this machine. Strangely enough, you can achieve very high accuracy because you can run a dial indicator along a 10 foot edge. A thousandth of an inch over 10 feet is only a ten-thousandth per foot or about 8 millionth's per inch!