Full definition
The double V-belt, also known as a hexagonal V-belt, features a symmetrical trapezoidal profile on both its top and bottom faces. This unique design allows the belt to transmit power effectively from either side, making it particularly suitable for applications involving serpentine drives, where the belt must navigate around multiple pulleys in alternating directions. The construction of double V-belts enables them to handle reverse bending, which is crucial for maintaining efficiency and performance in complex drive systems.
Standard profiles for double V-belts are defined by the Rubber Manufacturers Association (RMA), with designations including AA (13 mm), BB (17 mm), and CC (22 mm). In some catalogs, these profiles may also appear as HAA, HBB, and HCC, indicating their suitability for hexagonal configurations. The cross-section of the belt is approximately hexagonal, allowing for optimal grip and reduced slippage, which is vital in high-torque applications.
Industrially, double V-belts are widely utilized in agricultural machinery, such as combines and balers, textile looms, and various multi-shaft drives found in manufacturing setups. Their ability to deliver power from dual sides ensures that they can maintain high levels of efficiency even in demanding conditions. Correct installation and tensioning of these belts are critical to avoid premature failure and ensure longevity in operation, with belt length being measured at the neutral line to guarantee proper fit and function.