家用車床螺紋切削

The detailed imperial-to-metric conversion tables saved me hours of trial and error on my first attempt at cutting an odd-pitch thread.

The section on cutting metric threads on an imperial lathe finally made the process click for me. I had my first perfect 1.0mm pitch thread on the second try.

I've been cutting threads on my little 7x lathe for two years and always guessed at the dial settings, so the section walking through pitch and diameter charts for both imperial and metric was exactly what I needed. Clear diagrams, no fluff, and it finally explains why my half-nut timing was off.