Posted by Ron V on March 17, 2006 at 20:05:45:
In Reply to: DIN STANDARD 9 = AGMA-? posted by michael on March 17, 2006 at 14:16:45:
DIN 3963/1978 Quality standard "9" is approximately the same as AGMA 390.03 Quality standard "9". Both are "C" grade for medium accuracy gears cut on hobbers/shapers that are in 100% condition. Maximum achievable quality before production grinding quality.
This was sourced from “Handbook Of Practical Gear Design” 1994 by Charles W. Dudley.