What do the letter designations of V-belts from A through E represent?

The letter designations of V-belts from A through E specifically represent the cross-section dimensions of the belts. Each letter corresponds to a standard profile size, which helps in identifying the size and shape of the belt that will fit a particular pulley system. This dimensioning system allows for easy categorization and standardization in manufacturing and usage, ensuring compatibility with equipment. The cross-sectional shape and size are critical for the belt's performance, including how it engages with pulleys and its ability to transmit power effectively. Understanding these designations aids in selecting the correct belt for a specific mechanical application.