On the base of Hertzian stress theory we developed a new kind of disk cam mecha-nism whose follower has concave circle - arc bottom. This article presents theoretical support to this new concept

offers both diagrammatical and analytical steps for the cam contour design

ex-pounds the selection of basic dimensional parameters. Practical calculations have proved that this kind of mechanism can reduce the contact stress and wear

prolong the life of the mechanism. So it is more appropriate to satisfy high - speed and heavy - load requirements in modern machinery than the conventional cam mechanism.