When you work around heavy machinery and conveyor belts, it’s very important to know what kinds of tools to have on hand for quick repairs. Especially during peak times of operation, you don’t want to find you’ve run out of spare belts when a machine breaks down. Here’s what to know about the difference between poly and variable speed V-belts.
Belt Purpose
V-belts have been around for a long time and are preferred over chain and rope counterparts. V-belts typically have a trapezoidal shape that allows them greater traction in a drive system.
Poly V-belts have a slightly different shape than regular V-belts. Instead of one trapezoid, they have a series of triangular ridges, very similar to a row of teeth. These belts are not as thick as regular V-belts, making them a good choice for looping around multiple pulleys.
Variable speed V-belts are very similar to timing belts in cars, but we tend to use them in conveyor systems rather than engines.
Belt Design
Poly and variable speed V-belts are very different in appearance because they do different jobs. Poly belts achieve traction by wedging several triangular grooves into the sheave. These grooves run parallel to the length of the belt.
Variable speed belts, on the other hand, are toothed or cogged. This means their ridges are much shorter and run horizontally across the width of the belt. The cogs dig into matching grooves in the sheave in order to achieve traction.
Wear and Durability
A significant difference between poly and variable speed V-belts is how they hold up to wear and tear over time. Poly belts are like most V-belts in that they have a protective coating around their cores that helps them resist abrasion. Variable speed belts are raw-edged, meaning they do not have this added protection.
When choosing parts for your incline conveyor belts, it’s important to understand the different kinds and which ones need replacing more often. Visit Texas Belting and Supply online to access our wide selection of high-quality automotive and industrial belts.