Engineering a notched belt is definitely a balancing act among flexibility, tensile cord support, and stress distribution. Precisely designed and spaced notches help to evenly distribute stress forces as the belt bends, thereby assisting to prevent undercord cracking and extending belt existence.
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 highly application particular and deliver vastly different degrees of performance.
Unlike flat belts, which rely solely on friction and can track and slip off pulleys, V-belts possess sidewalls that match corresponding sheave grooves, offering additional surface and greater balance. As belts operate, belt pressure applies a wedging push 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. How a V-belt fits in to the groove of the sheave while working under pressure impacts its performance.
V-belts are manufactured from rubber or synthetic rubber stocks, so they possess the versatility to bend around the sheaves in drive systems. Fabric materials of various kinds may cover the share material to supply a layer of security and 
reinforcement.
V-belts are manufactured in a variety of industry regular cross-sections, or profiles
The classical V-belt profile goes 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, E) and lengths, and so are widely used to replace V-belts in older, existing applications.
They are accustomed to replace belts on industrial machinery manufactured in other areas of the world.
All of the V-belt types noted over are usually available from producers in “notched” or “cogged” variations. Notches reduce bending tension, enabling the belt to wrap easier around small diameter pulleys and enabling better heat dissipation. Excessive warmth is a major contributor to premature belt failure.
Wrapped belts have an increased 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 better, v belt china generate less heat, enable smaller pulley diameters, enhance power ratings, and provide longer life.
V-belts appear to be 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 strategy is about as wrong as you can get.