Posted by Dan McEachern on December 04, 2015 at 01:39:09:
In Reply to: differential constant posted by steve green on December 02, 2015 at 13:51:17:
From the Pfauter Change Gear ratio book:
Cda=225/8
ratio=(Cda x sin helix)/(pi x module x # hob starts)
Good luck! Dan