v belt china Engineering a notched belt is certainly a balancing act among versatility, tensile cord support, and tension 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 lifestyle.
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 selection of V-belts that are extremely application specific and deliver vastly different levels of performance.
Unlike toned belts, which rely solely on friction and may track and slide off pulleys, V-belts have sidewalls that match corresponding sheave grooves, providing additional surface area and greater balance. As belts operate, belt pressure applies a wedging pressure perpendicular with 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 in to the groove of the sheave while working under pressure impacts its performance.
V-belts are made from rubber or synthetic rubber stocks, so they have the versatility to bend around the sheaves in drive systems. Fabric materials of varied kinds may cover the share 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 goes back to industry standards created in the 1930s. Belts produced with this profile come in many sizes (A, B, C, D, Electronic) and lengths, and are widely used to displace V-belts in older, existing applications.
They are used to replace belts on industrial machinery manufactured in other parts of the world.
All the V-belt types noted over are typically available from manufacturers in “notched” or “cogged” versions. Notches reduce bending tension, permitting the belt to wrap easier around small diameter pulleys and enabling better high temperature dissipation. Excessive warmth is a major contributor to premature belt failure.
Wrapped belts have an increased resistance to oils and severe temperature ranges. They can be used as friction clutches during start up.
Raw edge type v-belts are better, generate less heat, enable smaller pulley diameters, boost power ratings, and provide longer life.
V-belts appear to be relatively benign and simple 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 possible get.