Page 498 - Cam Design Handbook

THB14 9/19/03 7:58 PM Page 486

486 CAM DESIGN HANDBOOK

14.26.3 Grooved Concave Globoidal Cam for Intermittent Motion

The concave globoidal cam is often referred to as the concave barrel cam. When used for
indexing, it is an improvement over the barrel cam or the cylindrical cam, Fig. 14.35a.
The concave globoidal cam has been successfully used in the paper industry where a 1000-
lb wheel, 50 inches in diameter, operates 16 hours per day, 100 indexes per minute, for
two years without noticeable wear.
The follower has rollers that ride in grooves of the cam, giving positive-drive action
during both indexing and dwell periods. There rollers remain at a constant depth as com-

FIGURE 14.35. Grooved concave globoidal cam for intermittent motion
(8-station).