Engineering a notched belt is usually a balancing act between flexibility, tensile cord support, and stress distribution. Precisely formed and spaced notches help evenly distribute stress forces as the belt bends, thereby assisting to prevent undercord cracking and extending belt lifestyle.
Like their synchronous belt cousins, v belt china v-belts have undergone tremendous technological development since their invention by John Gates in 1917. New synthetic rubber substances, cover materials, construction strategies, tensile cord advancements, and cross-section profiles have resulted in an often confusing array of V-belts that are highly application specific and deliver vastly different degrees of performance.
Unlike smooth belts, which rely solely on friction and can track and slide off 
pulleys, V-belts possess sidewalls that match corresponding sheave grooves, providing additional surface and greater balance. As belts operate, belt tension applies a wedging power perpendicular with their tops, pushing their sidewalls against the sides of the sheave grooves, which multiplies frictional forces that permit the drive to transmit higher loads. What sort of V-belt fits in to the groove of the sheave while working under stress impacts its performance.
V-belts are manufactured from rubber or synthetic rubber stocks, so they possess the flexibility to bend around the sheaves in drive systems. Fabric materials of various types may cover the stock material to provide a layer of safety and reinforcement.
V-belts are manufactured in various industry regular cross-sections, or profiles
The classical V-belt profile dates back to industry standards developed in the 1930s. Belts produced with this profile can be found in a number of sizes (A, B, C, D, Electronic) and lengths, and so are widely used to displace V-belts in older, existing applications.
They are accustomed to replace belts on industrial machinery manufactured in other parts of the world.
All of the V-belt types noted above are typically available from producers in “notched” or “cogged” versions. Notches reduce bending stress, permitting the belt to wrap easier around small diameter pulleys and allowing better warmth dissipation. Excessive temperature is a major contributor to premature belt failure.
Wrapped belts have a higher level of resistance to oils and severe temperatures. They can be utilized as friction clutches during set up.
Raw edge type v-belts are more efficient, generate less heat, allow for smaller pulley diameters, enhance power ratings, and offer longer life.
V-belts appear to be relatively benign and simple devices. Just measure the top width and circumference, find another belt with the same measurements, and slap it on the drive. There’s only 1 problem: that strategy is approximately as wrong as possible get.