Full definition
Banded V-belts, also known as joined V-belts, are a specialized type of power transmission belt consisting of multiple V-belts that are permanently joined by a common fabric top cover. This design creates a single unit that enhances the performance and reliability of belt drives. The primary advantage of banded V-belts is their ability to prevent issues such as individual belt rollover, turnover, and jumping out of grooves, which can occur in applications involving severe shock loads and pulsating torque. Banded V-belts are particularly advantageous in situations such as crushers, compressors, presses, and other heavy machinery where vertical shaft orientations or long center distances are prevalent. The tie band allows for a more even distribution of load across all ribs, thereby improving the overall performance and lifespan of the belt system.
When specifying banded V-belts, it is important to note that they are designated by the number of ribs plus the profile type, such as 3/SPA or 4/B. This notation helps users identify the correct belt for their application, ensuring compatibility with pulleys and sheaves. Banded V-belts are essential in scenarios where belt whip can be an issue, as the joined design mitigates this risk, enhancing operational stability. However, it is worth noting that banded V-belts may exhibit a slightly lower efficiency (approximately 1-2%) compared to matched individual sets due to the additional material used in the joining process. Despite this minor efficiency loss, the benefits of reliability and reduced maintenance make them a preferred choice in demanding applications. According to ISO 5290, these belts must also meet specific standards for performance and durability, ensuring they can withstand the rigors of industrial operations.