scope:

The steps to realize good gears are design, manufacturing, measurement and testing. Each step has an effect on the next one, the last one turns back on the first one, and so on. This workflow is valid in several applications, from gearboxes with zero-backlash, to automotive transmissions and industrial gearboxes for lifting in offshore application. This workflow is called "closed loop."

This paper will present some cases on this topic for bevel, cylindrical, and worm gears:

- exchange of information between the design department and quality control to compare designed, estimated, and realized microgeometry and LTCA;

- generation of K-Charts for the drawings that can be modified by the designer in case of exceptions for not respected but acceptable requirements;

- estimation of the twist due to manufacturing process.