Lathe thread dial

A threading dial for a small lathe.
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"The thread dial is what insures that the part and the carriage are synced up so you enter the same groove each time."

The bracket fits a polish TSB16 lathe, but the mounting point fits a M4 screw, so you can design your own.

The gear is designed for a metric trapezoidal lead screw with the diameter of 24mm, pitch 3mm, and 30° thread angle. It has 20 teeth.

Post-printing
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The face of the dial was supposed to have letters, but they were too small to print, so I sanded it on the lathe and used a correction fluid to make the markings.

It requires two 608 bearings and a 50 mm piece of 8 mm rod.

How to design a custom gear
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This is the tool to get the dimensions for your gear:
https://www.khkgears.co.jp/GDSW/WormDraw.do?method=trans&step=New&lang=en

Unfortunately you have to log in to use it, but the logins on bugmenot also work:
http://bugmenot.com/view/khkgears.co.jp

I suggest using this calcul