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

Like their synchronous belt cousins, V-belts have undergone tremendous technological development since their invention by John Gates in 1917. New synthetic rubber substances, cover materials, construction methods, tensile cord advancements, and cross-section profiles have led to an often confusing array of V-belts that are extremely application particular and deliver vastly different levels of performance.
Unlike toned belts, which rely solely on friction and may track and slip off pulleys, V-belts possess sidewalls that match v belt china corresponding sheave grooves, providing additional surface and greater balance. As belts operate, belt pressure applies a wedging power perpendicular with their tops, pressing their sidewalls against the sides of the sheave grooves, which multiplies frictional forces that permit the drive to transmit higher loads. How a V-belt fits into the groove of the sheave while working under tension 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 kinds may cover the stock material to supply a layer of safety and reinforcement.
V-belts are manufactured in a variety of industry standard cross-sections, or profiles
The classical V-belt profile goes back to industry standards created in the 1930s. Belts manufactured with this profile can be found in several sizes (A, B, C, D, E) and lengths, and are widely used to replace 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 tension, allowing the belt to wrap more easily around small diameter pulleys and allowing better temperature dissipation. Excessive high temperature is a significant contributor to premature belt failing.

Wrapped belts have a higher resistance to oils and intense temperature ranges. They can be utilized as friction clutches during start up.
Raw edge type v-belts are better, generate less heat, allow for smaller pulley diameters, boost power ratings, and offer longer life.
V-belts appear to be relatively benign and basic devices. Just measure the best width and circumference, find another belt with the same measurements, and slap it on the drive. There’s only 1 problem: that strategy is about as wrong as you can get.