Flat belts are used to transmit power between two shafts by means of friction. In practice, the designer has to select a belt from the manufacturer's catalogues. While selecting Flat belt drives, load correction factor, service factor and arc of contact factor have been considered. The range of optimum belt velocity has been taken from 17.8 m/s to 22.9 m/s. Both types of transmission belts - Hi-Speed duck belting and Fort duck belting has been considered in this package. All Standards are used throughout this module.