Which steel is used to make Thompson late tools
A question of size
Thompson lathe tools are American made, hence the ​conversion chart below.
We use the American standard to measure the tools, that is by the diameter of the steel. The European standard measures across the flute. In a world where we use both it does get confusing at times.
Here’s a simple chart to show both.
American —– European
3/8 ————– ¼
½ ————— 3/8
5/8 ————– ½
¾ ————— 5/8
7/8 ————– ¾
1 —————–7/8
