Bruno wrote:
A friend just got a Birmingham 12x36 lathe and tells me the leadscrew
is 8 TPI, yet the thread dial gear is 14 teeth, with 8 marks on it.

Masybe someone put it on for a special job and forgot it. The
threading dial gear on my South Bend has 32 teeth.

Thanks for reminding me to check it. It came from a different lathe
and needed cleaning and re-timing.