The wedge-shaped belt creates an exact match fit with the wheel’s wedged groove. When two pulleys are situated close one another, a V-belt drive frequently utilised. Due to the tight fit between the V-belt and the pulley groove side, flat belts cannot transmit the same force as V-belts. Additionally, the close centre distance between the pulleys aids in maintaining a compact design. V-belts are less efficient than flat belts, nevertheless. correas trapezoidales are very expensive.

V-belt construction characteristics

The following components make up a V-belt:

Steel wires:

Steel wires are of endless variety and have no joints between them. These wires give the correas trapezoidales  the support and sturdiness it needs for torque transmission.

Base rubber substance:

The V-core, made of a rubber composite, surrounds a steel wire and gives it shape. When power is transmitted, the rubber compound (an elastomer) also serves as a compression medium to absorb shocks.

Covering protection:

The protective cover is a plastic coating that gives the rubber enough tolerance to withstand the high temperature produced during the V-belt action.

Dimensions-based V-belt kinds

The sizes and types of V-belts are subject to several industry requirements. Although each variety has a basic trapezoidal design, it differs in size. Below is a discussion of the V-belt size charts and dimensions for each.

Regular V-belt

Power transmission frequently uses the ubiquitous V-belts. Table 1 lists the varieties of standard V-belts. Each varies from the others in terms of dimensions. The letters A, B, C, D, E, Y, and Z used to identify standard V-belts. These belts identified by the millimetres of their top width. For additional information on to measure and name a V-belt, read our post on How to find a V-belt replacement. There is a width-to-height ratio for all sizes.

Wedge V-belts

The main application for wedge-type V-belts is transfer high power with little need for additional space. Because of the increased power rating, fewer belts required to share the load. When operating at the top width standard V-belts, these belts can handle 1.5 to 2 times the weight. Wedge V-belts have a width ratio of 1.2:1 and a 40-degree included angle (see Figure 2). They have improved steel cord arrangement and structure, giving them strength while moving.

Double or hexagonal V-belt

Double V-belts, also known as hexagonal V-belts, look like two mirrored V-belts linked at the top. Figure 4 depicts the placement of the steel wires between the two V-shaped portions. Since belts may bend from either side to the compression cores, these belts employed for drives require numerous reverse bends. Multiple pulley systems are driven either clockwise or anticlockwise can use double V-belts. Sections of hexagonal V-belts referred to as AA, BB, and CC.