Posted by BillS on February 09, 2017 at 13:21:19:
In Reply to: Mikron 120 fine pitch gear hobber posted by Hano Lourens on February 06, 2017 at 23:22:17:
I've tried including index and differential info in the FAQ but so far, I've not seen anything regarding a 120 type Mikron. You might find something of use there, however.
Hope someone has intimate knowledge of the 120.01 - or at least the index constant.