Lathe indexing attachment - video

[Jon]

Lathe indexing attachment. By Jonesey Makes. 20:25 video:

[uv8452]

Thank you for the nice use of the 'nonius' principle.

[metric_taper]

This was an interesting build. I could see for making dials, the ability to have 100/200 divisions for threaded feed screws that are dividable by 10 vs 360 1 degree increments. Seems there could be two rows of holes, 36 and 20. I have a 5C spindex, now I know how to make the Vernier/(Nonius that's new to me) index.
The issue I'm thinking is having room for the holes.
Also I don't think making it from plastic 3D print is the right material for rigidity, as that was evident in his video.

[uv8452]

Dear Metric Taper,
The indexing things have to be reliably attached to spindle and body. (I didn't see that.)
I guess that the 3D print is rigid enough for the indexing. (wear by frequent use is another issue).
After the indexing one has to clamp the spindle firmly against cutting forces.
Ulrich