Engineering a notched belt can be a balancing act between flexibility, tensile cord support, and stress distribution. Precisely formed and spaced notches help to evenly distribute stress 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 highly application specific and deliver vastly different degrees of performance.
Unlike smooth belts, which rely solely on friction and may track and slide off pulleys, V-belts possess sidewalls that match corresponding sheave grooves, providing additional surface area and greater stability. As belts operate, belt stress applies a wedging pressure perpendicular to their tops, pressing their sidewalls against the sides of the sheave grooves, which multiplies v belt china frictional forces that permit the drive to transmit higher loads. What sort of 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 types may cover the stock material to supply a layer of security and reinforcement.
V-belts are manufactured in various industry standard cross-sections, or profiles
The classical V-belt profile goes back to industry standards developed 
in the 1930s. Belts manufactured with this profile can be found in several sizes (A, B, C, D, E) and lengths, and so are widely used to replace V-belts in old, existing applications.
They are used 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 stress, permitting the belt to wrap more easily around little diameter pulleys and enabling better heat dissipation. Excessive warmth is a significant contributor to premature belt failure.
Wrapped belts have an increased level of resistance to oils and severe temperature ranges. 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, boost power ratings, and provide longer life.
V-belts appear to be relatively benign and basic pieces of equipment. Just measure the best width and circumference, discover another belt with the same dimensions, and slap it on the drive. There’s only one problem: that strategy is approximately as wrong as you can get.