Figure 19.1: Dimensions, angles of contact, and center distance of open flat belt.

The machine elements considered in this chapter, like the machine elements considered in Chapter 18, use friction as a useful agent to produce a high and uniform force and to transmit power. A belt, rope, or chain provides a convenient means for transferring power from one shaft to another, and are especially useful for transfer of power over long distances. Table 19.1 compares belt, chain, and gear power transmission approaches.