MW_P: Metal Lathe Threading

It's reckoned that the Greeks invented the screw back in the 5th century BC. By the 1st century BC, the Greeks and Romans were using screw presses to press clothes, olives and wine. The first nuts and bolts appeared in the middle 1400’s. They were hand made and not interchangeable. Joseph Whitworth In England proposed a standard screw resulting in the Whitworth Screw thread in 1841. In Philadelphia in 1864 William Sellers proposed a standard American V thread. Near the end of the second world war (78 years later) the Sellers thread became the "US Standard”. The screw cutting engine lathe is the oldest and most important of machine tools. The first screw cutting lathes were made in the US in the early 1800’s and allowed the making of locomotives, electric motors and automobiles which drove the industrial revolution. The metal lathe with a lead screw is used to cut threads. Also the metal lathe makes it easier to cut threads using taps and dies.

In this class we will review the different types of screws. We will use taps, dies and the lathe to single point turn V threads.

Prerequisite: Metal lathe sign-off

Instructor: George Clessas