The most typical systems for transmitting power from a drive to a driven shaft are belt, gear, and chain drives. But V-belt drive systems, also called friction drives (because power is usually transmitted consequently of the belt’s adherence to the pulley) are an economical option for industrial, auto, commercial, agricultural, and home appliance applications. V-belt drives are also simple to install, need no lubrication, and dampen shock load.
Here’s the catch: Regular friction drives can both slide and creep, resulting in inexact velocity ratios or degraded timing precision between input and output shafts. Because of this, it is essential to select a belt appropriate for the application at hand.
Belt drives are among the earliest power tranny systems and were V Belt trusted during the Industrial Revolution. Then, flat belts conveyed power over large distances and were made from leather. Later, demands for better machinery, and the growth of large markets such as the automobile industry spurred new belt styles. V-belts, with a trapezoidal or V shape, manufactured from rubber, neoprene, and urethane synthetic materials, replaced flat belts. Now, the increased overall surface area material of modern belts adheres to pulley grooves through friction drive, to reduce the tension required to transmit torque. The very best portion of the belt, known as the tension or insulation section, consists of fiber cords for increased strength since it carries the load of traction push. It can help hold tension members in place and acts as a binder for better adhesion between cords and additional sections. This way, heat build-up is decreased, extending belt life.
We’ve designed our V-belts for wear, corrosion, and heat level of resistance with OE quality suit and building for reliable, long-enduring performance.
V-Belts are the most common type of drive belt used for power transmission. Their primary function is usually to transmit power from a major source, such as a electric motor, to a second driven unit. They provide the best combination of traction, velocity transfer, load distribution, and extended service life. The majority are unlimited and their cross section can be trapezoidal or “V” designed. The “V” form of the belt tracks in a likewise designed groove on a pulley or sheave. The v-belt wedges into the groove as the strain improves creating power distribution and torque. V-belts are generally made of rubber or polymer or there could be fibers embedded for added strength and reinforcement.
V-belts are generally found in two construction classes: envelope (wrapped) and raw edge.

Wrapped belts have a higher resistance to oils and severe temperature ranges. They can be used as friction clutches during start up.
Raw edge type v-belts are more efficient, generate less heat, enable smaller pulley diameters, boost power ratings, and offer longer life.
V-belts appear to be relatively benign and basic pieces of equipment. Just measure the best width and circumference, find another belt with the same dimensions, and slap it on the drive. There’s only one problem: that approach is about as wrong as you can get.