When a belt stretches every revolution under load, driven RPM is reduced. This difference-or “allowed belt slippage”-must be kept below 2%. Above 2%, the belt returns to its slack-side length part-way around the driver sheave, and stretches to its tight-side length partway around the driven sheave. Belt length is determined in a datum or effective system. For this reason the datum or effective diameters are determined first for each pulley. The belt trajectory is based on individual pulley position. The sliding pulley position is adjusted to accomplish standard belt length criteria. The calculation uses iteration solution to find appropriate sliding pulley position what is closest to By selecting the base belts, profiles and tension cords, the corresponding data sheet for the timing belt can be found. The data sheet not only includes the most important basic data about the belts, but also relevant design data, such as minimum diameters for pulleys and idlers. Each data sheet can then be downloaded free of charge as a PDF file. Hence Vee-belt drive with E-type cross-sections is used in the heavy-duty machine. Additional Information. Vee belts are preferred over the flat belts the reasons follow. Power transmitted is more due to wedging action in the grooved pulley. Higher velocity ratio (Upto 10) can be obtained. Vee-belt drive is more compact, quiet and shock absorbing. Enter value and click on calculate. Result will be displayed. The V-belt was developed in 1917 by John Gates of the Gates Rubber Company. It's called a V-belt because of its V shaped cross-section. V-belts (also known as Vee belt or wedge rope) are an early solution that solved the slippage and alignment problem.

Equation to Determine Crossed Belt Friction Belt Drive . Crossed Belt Friction Belt Drive Calculator. Where: L = Length (inches) C = Center Distance (inches) D 1 = Pitch Diameter of Small Pulley (inches) D2 = Pitch Diameter of Large Pulley (inches) When determining the length of a serrated type belt, both equations are to be divided by the belt

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    • timing belt calculation formula