The material includes the needed theory regarding the belt transmissions. It refers to the mechanism of transmitting power from one shaft to another using a belt that runs over two pulleys. The belt drive system consists of a driving pulley that rotates to create a pulling action on the belt. The driven pulley then absorbs the pulling action and rotates in the same direction as the driving pulley. The tension created on one side of the belt, called the tight side, and the slack on the other side, enables power transmission. Belt drives are commonly used in industries such as energy, construction materials, food and beverage, warehouse and distribution, and agriculture due to their efficiency, reliability, and lower production cost. The types of belt drives include open belt drive, closed or crossed belt drive, fast and loose cone pulley, stepped cone pulley, jockey pulley drive, quarter turn belt drive, and compound belt drive. Each of these types has specific applications and advantages based on their design and configuration.