Engineering a notched belt can be a balancing act between versatility, tensile cord support, and tension distribution. Precisely shaped 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 V Belt technological development since their invention by John Gates in 1917. New synthetic rubber compounds, cover materials, construction methods, tensile cord advancements, and cross-section profiles have resulted in 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 will track and slip off pulleys, V-belts possess sidewalls that match corresponding sheave grooves, offering additional surface and greater stability. As belts operate, belt tension applies a wedging push perpendicular to their tops, pushing 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 flexibility to bend around the sheaves in drive systems. Fabric materials of varied types may cover the share material to supply a layer of safety and reinforcement.
V-belts are manufactured in a variety of industry regular cross-sections, or profiles
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classical V-belt profile goes back to industry standards developed in the 1930s. Belts produced with this profile come in several sizes (A, B, C, D, Electronic) and lengths, and so are widely used to replace 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” variations. Notches reduce bending tension, permitting the belt to wrap more easily around little diameter pulleys and enabling better heat dissipation. Excessive high temperature is a major contributor to premature belt failing.
Wrapped belts have an increased resistance to oils and intense temps. They can be utilized as friction clutches during set up.
Raw edge type v-belts are better, generate less heat, enable smaller pulley diameters, increase power ratings, and offer longer life.
V-belts look like 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.
