1. Hamrock, Jacobson and Schmid©1998 McGraw-Hill Chapter 18: Flexible Machine Elements Scientists study the world as it is, engineers create the world that has never been. Theodore von Karman Image: An assortment of chains and belts and their associated sprockets and pulleys. Courtesy of Sterling Instrument Co.

2. Hamrock, Jacobson and Schmid©1998 McGraw-Hill Open Flat Belt Figure 18.1 Dimensions, angles of contact, and center distance of open flat belt. Text Reference: Figure 18.1, page 828

3. Hamrock, Jacobson and Schmid©1998 McGraw-Hill Weighted Idler Figure 18.2 Weighted idler used to maintain desired belt tension. Text Reference: Figure 18.2, page 832

4. Hamrock, Jacobson and Schmid©1998 McGraw-Hill Timing Belt Text Reference: Figure 18.3, page 832 Figure 18.3 Synchronous, or timing, belt.

5. Hamrock, Jacobson and Schmid©1998 McGraw-Hill V-Belt in Sheave Groove Figure 18.4 V-belt in sheave groove. Text Reference: Figure 18.4, page 834

6. Hamrock, Jacobson and Schmid©1998 McGraw-Hill Overload Factors Table 18.1 Overload service factors (f 1 ) for various types of driven unit. Text Reference: Table 18.1, page 835

7. Hamrock, Jacobson and Schmid©1998 McGraw-Hill Minimum Pulley Pitch Diameter Table 18.2 Recommended minimum pitch diameters of pulley for three belt sizes. Text Reference: Table 18.2, page 836

8. Hamrock, Jacobson and Schmid©1998 McGraw-Hill Recommended Pulley Diameter Text Reference: Table 18.3, page 836 Table 18.3 Recommended pulley diameters in inches for three electric motor sizes.

9. Hamrock, Jacobson and Schmid©1998 McGraw-Hill Arc Correction Factors Table 18.4 Arc correction factors for various angles of loss in arc of contact. Text Reference: Table 18.4, page 837

10. Hamrock, Jacobson and Schmid©1998 McGraw-Hill Power Ratings for Light Duty V-Belt Table 18.5 Power ratings for light duty V-belt. (a) 2L section with w t =1/4 in. and h t =1/8 in. Text Reference: Table 18.5, page 838

11. Hamrock, Jacobson and Schmid©1998 McGraw-Hill Power Ratings for Light Duty V-Belt (cont.) Table 18.5 Power ratings for light duty V-belt. (b) 3L section with w t =3/8 in. and h t =1/4 in. Text Reference: Table 18.5, page 838

12. Hamrock, Jacobson and Schmid©1998 McGraw-Hill Power Ratings for Light Duty V-Belt (cont.) Table 18.5 Power ratings for light duty V-belt. (c) 4L section with w t =1/2 in. and h t =9/32 in. Text Reference: Table 18.5, page 839

13. Hamrock, Jacobson and Schmid©1998 McGraw-Hill Center Distances Table 18.6 Center distances for various pitch diameters of driver and driven pulleys. (a) 3L type of V-belt. Text Reference: Table 18.6, page 839

14. Hamrock, Jacobson and Schmid©1998 McGraw-Hill Center Distances (cont.) Table 18.6 Center distances for various pitch diameters of driver and driven pulleys. (b) 4L type of V-belt. Text Reference: Table 18.6, page 840

15. Hamrock, Jacobson and Schmid©1998 McGraw-Hill Wire Rope Figure 18.5 Cross section of wire rope. Text Reference: Figure 18.5, page 841

16. Hamrock, Jacobson and Schmid©1998 McGraw-Hill Rope Lay Figure 18.6 Two lays of wire rope. (a) Lang; (b) regular. Text Reference: Figure 18.6, page 842

17. Hamrock, Jacobson and Schmid©1998 McGraw-Hill Wire Rope Data Table 18.7 Wire rope data [From Shigley and Mitchell (1983)] Text Reference: Table 18.7, page 843

18. Hamrock, Jacobson and Schmid©1998 McGraw-Hill Minimum Safety Factors for Wire Rope Table 18.8 Minimum safety factors for variety of wire rope applications. [from Shigley and Mitchell (1983)] Text Reference: Table 18.8, page 844

19. Hamrock, Jacobson and Schmid©1998 McGraw-Hill Loss in Rope Strength vs. D/d Ratio Figure 18.7 Percent strength loss in wire rope for different D/d ratios. Text Reference: Figure 18.7, page 846

20. Hamrock, Jacobson and Schmid©1998 McGraw-Hill Service Life vs. D/d ratio Figure 18.8 Service life for different D/d ratios. Text Reference: Figure 18.8, page 846

21. Hamrock, Jacobson and Schmid©1998 McGraw-Hill Maximum Allowable Bending Pressures for Wire Rope Table 18.9 Maximum allowable bending pressures for various sheave materials and types of rope. [From Shigley and Mitchell (1983)] Text Reference: Table 18.9, page 847

22. Hamrock, Jacobson and Schmid©1998 McGraw-Hill Rolling Chain Text Reference: Figure 18.9, page 849 Figure 18.9 Various parts of a rolling chain.

23. Hamrock, Jacobson and Schmid©1998 McGraw-Hill Strengths of Rolling Chains Text Reference: Table 18.10, page 850 Table 18.10 Standard sizes and strengths of rolling chains.

24. Hamrock, Jacobson and Schmid©1998 McGraw-Hill Chordal Rise Text Reference: Figure 18.10, page 851 Figure 18.10 Chordal rise in rolling chains.

25. Hamrock, Jacobson and Schmid©1998 McGraw-Hill Transmitted Power Table 18.11 Transmitted power of single-strand, no. 25 rolling chain. Text Reference: Table 18.11, page 853

26. Hamrock, Jacobson and Schmid©1998 McGraw-Hill Rolling Chain Service Factors Table 18.12 Service factors for rolling chains. Text Reference: Table 18.13, page 854

27. Hamrock, Jacobson and Schmid©1998 McGraw-Hill Multiple-strand Factors Table 18.13 Multiple strand factors for rolling chains. Text Reference: Table 18.14, page 854

28. Hamrock, Jacobson and Schmid©1998 McGraw-Hill Dragline Figure 18.11 Typical dragline. Text Reference: Figure 18.11, page 856