This document discusses cams and followers. It classifies followers based on their surface in contact, line of motion, and type of motion. Cams are classified as radial, cylindrical, translatory, conjugate, globoidal, and spherical. Cams are also classified based on the type of follower movement, such as dwell-rise-dwell-return-dwell, and based on the constraint of the follower movement, such as preloaded spring cams and positive drive cams.

1. Unit 6 : Cams and followers
Topics: Working/ Application of Cam and Follower, Classification of Follower,
Classification of Cams

2. Introduction
• A cam is machine
element which rotate
at uniform speed.
• Oscillatory/
reciprocating element
is called follower.
• Motion of follower
depend upon shape of
cam.

3. Working/ Application of Cam and
Follower

4. Classification of Follower

5. According to the surface in contact

6. According to line of motion of
follower
Translatory motion follower Oscillating Follower

7. According to Motion of follower
Radial follower Offset Follower

8. Classification of Cams

9. Radial or Disc Cam

10. Cylindrical Cam

11. Translatory or Wedge Cam

12. Conjugate Cams

13. Globoidal Cams

14. Spherical Cam

15. Classification of Cam According to
type of follower Movement
a. Dwell- Rise- Dwell – Return- Dwell
D-R-D-R-D) Cam
b. Dwell- Rise- Return- Dwell (D-R-R-D)
Cam
c. Rise-Return- Rise (R-R-R) Cam
d. Dwell- Rise – Dwell (D-R-D) cam

16. Dwell- Rise- Dwell – Return- Dwell
D-R-D-R-D) Cam

17. Dwell- Rise- Return- Dwell (D-R-R-D)
Cam

18. Rise-Return- Rise (R-R-R) Cam

19. Dwell- Rise – Dwell (D-R-D) cam
19

20. Classification of Cam According to type of
Constraint of the follower Movement
a. Preloaded spring Cam
b. Positive Drive Cam

21. Preloaded spring Cam

22. Positive Drive Cam