Conical cam 1 rotates about fixed axis A-A and has profiled helical groove a. Follower 3 reciprocates in fixed guides D-D and carries roller 2 which rolls and slides along groove a. Axis B-B of guides D-D is parallel to an element of the conical surface of cam 1. A full cycle corresponds to several revolutions of cam 1, the number depending upon the pitch and number of turns of helical groove a.
$3035$SmC,3L$