ISO's Technical Committee on Gears, comprised of a multi-national delegation, published several new standards, including: ISO 6336-1:2006, Calculation of load capacity of spur and helical gears - Part 1: Basic principles, introduction and general influence factors. ISO 6336-2:2006, Calculation of load capacity of spur and helical gears - Part 2: Calculation of surface durability (pitting). ISO 6336-3:2006, Calculation of load capacity of spur and helical gears - Part 3: Calculation of tooth bending strength. ISO 6336-6:2006, Calculation of load capacity of spur and helical gears - Part 6: Calculation of service life under variable load. ISO 23509:2006, Bevel and hypoid gear geometry. The Helical Gear Rating (ISO 6336) and Bevel Gearing (ISO 23509) Committees served as the Technical Advisory Groups, determining the U.S. position on technical issues, throughout the development of these standards. A more detailed explanation is available on the organization's website.