He made the first interchangeable standard for parts of lathes.
For grinding-lathes and roll grinding, see article on Lathes.
The sparks fly from the lathes, and they look like fireworks.
To this end he had built near his home several machine shops, with engines, lathes and apparatus for various kinds of work.
Andy was in his element among the lathes, vises, saws, and general ...