Abstract
Typically, the circular-arc tooth-trace (CATT) gears are considered as a special type of spiral bevel gears whose shaft-angle is zero. Conventional circular face-mill gear-cutters are used to make these gears. In this paper, the characteristic of the new CATT gears designed by the author with 3D-CAD/CAM were studied; the tooth profile of pinion gears have the same involute curve at the any section through the face-width. Similarly the tooth profile of the CATT's rack is a straight line at the both ends of the face-width.
