- Joined
- Jul 5, 2016
- Messages
- 39
hi my first time posting on this site..... im in the process of making the atlas gear cutting fixture from the prints floating around the internet..........its going pretty good so far ...but i keep looking at the print and im wondering why they chose a boston gear nb72 to have on the indexing end of this fixture ........the fixture has a .500 1/2-13 threaded end on the blank end and a .625 stub with 1/2-13 threaded portion on the indexing end ......is the 72 tooth gear relevant to making more gears with less teeth and smaller diameter ? if anyone knows this info please pass it on to me as there is no instructions with this once i get it done ..........tia.........eric