Posted by Chris Dale on October 07, 2009 at 21:59:33:
In Reply to: Re: Agma 8-CH-13 posted by Sp on September 24, 2009 at 02:50:14:
From ANSI/AGMA 2000:A88 - Gear Classification and Inspection Handbook for Unassembled Spur and Helical Gears designates the following:
Q8 is the tooth quality tolerances
CH is Alloy Steel - Case Hardened
13 is 55HRC minimum surface hardness
Hope this helps
Chris