"FOREWORD In 1926 the AGMA adopted a recommended practice for gearing nomenclature@ terms and definition""s.ic1t""included some symbols and abbreviations. A complete revision elf terms and definitions by the AGMA Nomenclature Committee was AGMA 112.02 issued in October@ 1948. This later became AGMA 112.03@ and . American Standard B6.J0-1954@ with ASME as a co-spoonsor. A separate project dealing with Letter Symbols for Gear Engineering appeared in 1943 as AGMA 111.01@ later becoming AGMA 111.03 and American Standard 86.5-1954. Abbreviations for Gearing was another separate project released as AGMA 116.01 in 1955. Most of these abbreviations were already listed in American Standard Z32. 13-1950 ''Abbreviations for Use on Drawings""@ and it was@ therefore@ unnecessary to process gearing abbreviations as a separate American Standard. The number of abbreviations used in gearing has intentionally been kept very small to permit memorizing without the ""need to refer to the standard. AGMA Standard 112.04@ ""Gear Nomenclature-Terms@ Defiriitions@ Symbols and Abbreviations@'' was a?? complete revision and integraiion of ihe thre.e standards previously mentioned. Because of the widespread acceptance of the pre.vious s_tandards@ changes were.??@ kept to a minimum. The standard in this form was approved by the AGMA Membership as of April 25@ 1965. This standard@ AGMA 112.05@ includes several revisions to keep it abreast with current gearing techniques. It has been approved by Standards Committee B6@ Gears@ the Co-Secretariats and the American National Standards Institute as of February 3@ 1976@ and designated ANSI B6.14-1976."