Engineering a notched belt is a balancing act between flexibility, tensile cord support, and stress distribution. Precisely shaped and spaced notches help 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 resulted in an often confusing array of V-belts that are highly application specific and deliver vastly different levels of performance.
Unlike toned belts, which rely solely on friction and can track and slide off pulleys, V-belts possess sidewalls that fit into corresponding sheave grooves, providing additional surface and greater balance. As belts operate, belt stress applies a v belt china 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 in to the groove of the sheave while operating 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 varied types may cover the stock material to provide a layer of protection 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 many sizes (A, B, C, D, E) and lengths, and so are widely used to displace V-belts in old, existing applications.
They are used to replace belts on commercial machinery manufactured in other parts of the world.
All of the V-belt types noted over are typically available from producers in “notched” or “cogged” versions. Notches reduce bending tension, allowing the belt to wrap easier around little diameter pulleys and enabling better heat dissipation. Excessive high temperature is a major contributor to premature belt failing.

Wrapped belts have a higher resistance to oils and extreme temps. 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, enhance power ratings, and offer longer life.
V-belts look like relatively benign and simple devices. Just measure the top width and circumference, discover another belt with the same sizes, and slap it on the drive. There’s only one problem: that strategy is approximately as wrong as you can get.