Crowne Plaza Old Towne Alexandria, Alexandria, Virginia. Raymond Drago, chief engineer-gear technologist, Drive Systems Technology, Inc., will instruct attendees on a basic introduction to gear theory and standardization of AGMA/ISO analyses. This will include practical considerations and limitations associated with the application of standard AGMA/ISO durability rating analyses and investigation of the differences in stress states among the various surface durability failure modes including pitting, spalling, case crushing and subcase fatigue. Attendees will improve gear design, better understand gear rating theory and discuss time dependent and time independent failure modes related to tooth design.