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December 16, 2019

Engineering a notched belt is certainly a balancing act between versatility, tensile cord support, and tension distribution. Precisely designed and spaced notches help to evenly distribute stress forces as the belt bends, thereby helping to prevent undercord cracking and extending belt lifestyle.

Like their synchronous belt cousins, V-belts have undergone tremendous technological development since their invention by John Gates in 1917. New synthetic rubber compounds, cover materials, construction strategies, tensile cord advancements, and cross-section profiles have led to an often confusing selection of V-belts that are extremely application particular and deliver vastly different levels of performance.
Unlike smooth belts, which rely solely on friction and may track and slip off pulleys, V-belts possess sidewalls that fit into corresponding sheave grooves, providing additional surface and greater stability. As belts operate, belt pressure applies a wedging pressure perpendicular to their tops, pressing their sidewalls against the sides of the sheave grooves, which multiplies frictional forces that allow the drive to transmit higher loads. What sort of V-belt fits into the groove of the sheave while working under stress impacts its performance.
V-belts are made from rubber or synthetic rubber stocks, so they possess the flexibility to bend around the sheaves in drive systems. Fabric materials of varied types may cover the stock material to provide a layer of security and reinforcement.
V-belts are manufactured in various industry regular cross-sections, or profiles
The classical V-belt profile dates back to industry standards created in the 1930s. Belts manufactured with this profile can be found in several sizes (A, B, C, D, Electronic) and lengths, and are widely used to replace V-belts in older, existing applications.
They are used to replace belts on commercial machinery manufactured in other areas of the world.
All the V-belt types noted over are usually available from manufacturers in “notched” or “cogged” variations. Notches reduce v belt china bending tension, allowing the belt to wrap easier around small diameter pulleys and enabling better high temperature dissipation. Excessive high temperature is a significant contributor to premature belt failure.

Wrapped belts have a higher level of resistance to oils and extreme temperature ranges. They can be utilized as friction clutches during set up.
Raw edge type v-belts are more efficient, generate less heat, enable smaller pulley diameters, increase power ratings, and offer longer life.
V-belts look like relatively benign and simple pieces of equipment. Just measure the top width and circumference, discover another belt with the same dimensions, and slap it on the drive. There’s only one problem: that approach is about as wrong as possible get.