V Belt Pulleys Selection Guide

V belt pulleys (also called vee belt sheaves) are devices which transmit power between axles by the use of a v belt, a mechanical linkage with a trapezoidal cross section. Together these devices offer a high speed power transmission solution that is resistant to slipping and misalignment.

V belt pulleys are solely used for transmitting power between two parallel axels. The most notable difference between a v belt pulley and other types of pulleys (round belt, flat, etc.) would be the geometry of the groove or grooves located around the circumference of the pulley; these grooves guide and gain traction on a v belt. The accompanying video offers a comprehensive overview of some v belt basics, as well as their advantages and variations.

A v belt is a unique mechanical linkage with a cross section that resembles an isosceles trapezoid. The v belt and its complementing pulley create the most efficient belt drive known (sometimes achieving 98% transmission efficiency). V belts were developed in the early days of automobile innovation to improve belt reliability and torque transmission from the crankshaft to rotating assemblies. V belts remain a common type of serpentine belt today.

V belt transmissions are a notable upgrade from round or flat belt transmissions; v belts provide excellent traction, speed, and load capabilities, while enjoying an extended service life with simple replacement. Heavy loads actually increase transmission efficiency since they wedge the belt further into the pulley’s groove, thereby improving friction. Typically, v belt drives operate between 1,500 to 6,000 ft/min, with 4,500 ft/min the ideal capacity for standard belts. Some narrow v belts can operate at speeds of up to 10,000 ft/min, but these pulleys must be dynamically stabilized. V belt pulleys may be placed in a side by side configuration or a single pulley may feature multiple grooves around the circumference in order to accommodate a multiple belt drive. This type of drive distributes torque across several belts and provides a mechanical redundancy.

This article comes from globalspec edit released

What Does A Poly V Belt Do?

For many people, when the subject of car parts comes up, their brain just shuts off; we’ve got mechanics to know that stuff for us. They seems so complicated that most people don’t see the point in trying to learn about them at all. In fact, in small doses, learning about how your vehicle functions can be entirely possible, even interesting. Why not begin now? We’ve created an overview of one of your car’s lesser known parts; the poly v belt.

Your car’s poly v belt (also referred to as serpentine belt, multi rib belt, and multi vee belt) consists of one continuous belt that powers many tangential engine parts, including the alternator, water pump, air conditioning compressor, and more.

This poly v belt has been an upgrade from older multi belt systems because one belt can handle more tension, something necessary for their function.

The only downside seems to be that when the poly v belt gets displaced, all of these important parts cease to function. Still, that doesn’t require much work to fix.

This article comes from missionviejoautoshop edit released

Introduction to V Belts

When looking for V Belts we normally think that there is only one type of V Belts but there are several and each one of them with specific properties to work better depending of the type of application.

Here is a small recollection of all the types of V Belts on the market and the specifics of each one of them.

V Belts Families

This is the most common type of V belts. They are commonly used in agricultural applications and industrial machinery.

They have a good temperature resistance (-31F to 158F) but a limited resistance to oil.

The way they are measured is with the top width and the internal length (in inches). Depending on the width there are 5 types of classic v belts:

A Type V belt: ½” top width

B Type V belt: 21/32” top width

C Type V belt: 7/8” top width

D Type V belt: 1 ¼” top width

E Type V belt: 1 ½” top width

This article comes from gprindustrial edit released

Tension of drive belt

Total tension required in a drive belt depends on the type of belt, the design horsepower, and the drive rpm. Since running tensions cannot be measured, it is necessary to tension a drive statically.

The force/deflection method is most often used. Once a calculated force is applied to the center of a belt span to obtain a known deflection, the recommended static tension is established. Most design catalogs provide force and deflection formulas.

With too little tension in a drive belt, slippage can occur and lead to spin burns, cover wear, overheating of the drive belt, and possibly overheating of bearings. Not enough tension in a synchronous drive belt causes premature tooth wear or possible ratcheting that will destroy the drive belt and could break a shaft.

When installing a new drive belt, installation tension should be set higher. Generally 1.4-1.5 times the normal static tension. This is necessary because drive tension drops rapidly during the seating-in process. This extra initial tension does not affect bearings because it decays rapidly.

Plant Engineering magazine extends its appreciation to The Goodyear Tire & Rubber Co. for its cooperation in making the cover photo possible.

This article comes from plantengineering edit released

V Belts: What To Know

V Belts and Wedge Belts are commonly used in industrial applications and also in auto repairs. Their names describe the type of belt as when the belts themselves intersect; they form a V shape or wedge shape. V & Wedge Belts are extremely popular as they make an excellent low cost, quiet and efficient means of transmitting power. However, not all V belts are the same, some will perform better at getting you closer to your end goal. The various types of v belts available include: cogged, raw edge, wrapped and banded v belts which incorporate two or more v belts joined together to make a single belt which provides extra strength due to all the belts being exactly the same length. Grouped under the Power Transmission banner, V Belts have two main functions; to transmit power from one shaft to another and to either increase or decrease speed of a motion.

Synchronous belts, also known as timing belts, are the latest concept in power transmission belting evolution. These belts combine the advantages of chain and gear with the advantages of V belts, but without the limitations usually associated with these conventional types of drives.

Serpentine belts, sometimes called Poly vee belts, are single, endless belts with longitudinal v shaped ribs that mate perfectly with the v grooves in the pulleys. They combine the convenience ofa a thin, one piece flat belt with the strong gripping traction of multiple v belts to make the Poly V belt far better than either for many applications. Interestingly, timing belts were introduced to replace the utilisation of timing chains, which are impressively durable however slightly outdated. Double sided timing belts can also be purchased, which account for all precisions within a fast powered transmission.

Suppliers of V belts and timing belts are in vast supply, to suit any type of application. Imports are also readily available, a significant amount coming from India. Results have shown that maintenance to V belts is crucial, as low quality v belts and ribbed v belts or lack of care to an existing v belt (such as a lack of pulley alignment) can lead to breakdown or failure. Handy tips for v belt maintenance involve not over tensing the belts, using a span sonic tension meter to accurately read and manage tension levels, and that all bolts around the v belt should be sufficiently tightened. Failure is easily caused by a lack of a decent support for the belt, too much lubrication on the bolts and too much sheave wear .Belts can last a very long time, up to 6 years if effectively stored at the correct temperature and a non humid environment.

This article comes from acorn-ind edit released


When choosing what type of cogged v belt to purchase it is important to consider which style will be best for your application. Classic on-cogged v belts are economical when it comes to the upfront cost, but this does not remain true for long-term and frequent usage. Cogged belts are designed with slots that run perpendicular to the length of the belt, this design greatly decreases bend resistance of the belt. Because they are dimensionally equivalent minus the slots cogged belts can run on the same pulleys you are already using for standard cogged v belts. This style of belt is especally useful in high-speed compact drives. USA Roller Chain and Sprockets (USARC) is a premier supplier of AX, BX, and CX single and banded cogged v belts. To get a quote or for additional information please contact us and we will be happy to assist you.


The benefits of using a cogged v belt include longer operational life, cooler running, and around a 2% higher efficiency raring than a standard cogged v belt.

Cost Savings Analysis Example:

Let’s say we are running a 100 horsepower supply air fan motor that is rated at 93% efficient and operates at a consistent load of 75%, and it consumes 527,000 kWh annually. When switching from a 93% efficient (E1) cogged v belt to a 98% efficient (E2) cogged v-belt, with electricity priced at $0.05/ kWh here’s what the savings are and how it is calculated.

Energy Savings= annual energy use x(1 – E1/E2)

= 527,000 kWh/year x(1-93/98)= 26,888 kWh/ year

Annual Savings= 26,888 x $0.05 kWh = $1,345/ annually

This article comes from usarollerchain edit released

What Are The Different Types Of V Belts?

V belts are one of the many different types of conveyor belts available. These belts are different from the other varieties because there is only one strand of v belt found underneath the roller bed. This belt can be found on one of the sides of the rollers right next to the belt’s side-frame. These belts run in the opposite direction from that of whatever contents the v belt is conveying. These types of belts are best for light or medium duty loads and are not the best in environments that are moist or oily. One of the great things about these belts is that in order for the belt to function, only very light contact between the belt and the bed rollers is necessary.

Types Of V belts

Although there are many options available when selecting the best v belt for your business, there are two main types of belts, poly v belts and variable speed v belts. Poly v belts are ideal for those who want a flexible belt that will offer smooth performance along with a low profile design and the capability to work at high speeds. The variable speed v belt on the other hand can work with sheave drives of variable speeds and because of this it requires a great deal of lateral rigidity to help maintain a consistent speed control.

More Options

In addition to selecting between poly v belts and variable speed v belts, there are also other options you can make to customize your v belt, making it unique. These belts can come in a wide variety of surfaces depending on what is required for the function they will perform. Some of the most common types of v belts include ribbed ones, notched ones, cogged ones, banded ones, wedged ones and smooth ones, each of which is specifically designed to help serve a different purpose. The guides for the v belts can also come in several types, mostly based on shapes and surface with the most common shapes being a triangle profile, a rectangle profile, a special rectangular profile (with rounded corners) and a special v-profile (a trapezoidal shape).

Normal Uses

V belts are widely used because of their versatility as well as ability to handle directional changes that might prove challenging with other types of conveyor belts. They can be used for basic tasks such as product alignment, offsetting connections, diverting, merging and directional changes. Because of these functions, they are ideal for many industrial applications and are very common in power transmission/driving, conveying, sequencing and timing. The different types available are what make v belts so versatile.


No matter which type of v belt you select or what surface you opt for, there are several features that are common for all of these belts. They will all follow a belt path which eliminates the risk of bending back the belt and because of their abilities with directional changes they are usually available in tight radius configurations. They will almost always have automatic drive pressure and true taper rollers in addition to sleeves that allow them to move the product through curves quietly while still maintaining their orientation.