A V-belt is a fully formed, wedge-shaped drive belt with high flexibility and tensile strength, combining the advantages of a flat belt and a poly-V belt. A V-belt guarantees stable and efficient belt tension, as its shape ensures the belt's position on the pulley.
V-belts must be able to function in different temperature ranges .
Most belts are designed for temperatures from -18°C to +90°C , making them suitable for a wide variety of environments.
Here you will find all the information you need about V-belts
A V-belt is an essential component in drive technology and plays a central role in industry and mechanical engineering.
This drive belt is characterized by its distinctive wedge shape and frictional power transmission via the flanks, making it the ideal choice for a wide variety of applications.
To make the right choice for each application, an understanding of the different profiles, dimensions, and variants is essential. Profiles such as B 17 are among the available options according to DIN standards.
Key features include:
V-belts are available in different widths, which vary depending on the profile.
For example, the SPZ profile has a width of 9.7 mm, the SPA profile 12.7 mm, the SPB profile 16.3 mm and the SPC profile 22.0 mm.
These width specifications are crucial for selecting the right belt for your application.
The length of a V-belt is specified in various dimensions , including the inner length (Li), the outer length (La) and the effective length (Lw/Ld).
These dimensions are important to ensure that the belt fits perfectly into the drive system.
The profile shape of a V-belt varies depending on the requirements and type of drive system. There are classic profiles such as Z, A, B (for example, B17), C, D , and E , which differ in width and height and are suitable for various load ranges. These profiles are frequently used in standard applications where performance and durability requirements are moderate.
In addition to the standard profiles, there are specialized profiles such as SPZ, SPA, SPB , and SPC , which are specifically designed for higher power transmission and more demanding application conditions. These profiles are particularly suited for industrial applications requiring higher torque and a longer service life.
V-belts must be able to function in different temperature ranges .
Most belts are designed for temperatures from -18°C to +90°C , making them suitable for a wide variety of environments.
How to find the right V-belt
The inner length (Li) describes the length of the V-belt along the inside and is often used as a reference measurement for precise orders.
Since the inner length indicates the inner circumference of the belt, it is particularly helpful to ensure that the V-belt fits precisely into the existing drive system.
The outer length (La) describes the length of the V-belt along the outer edge and is used as a dimension by certain manufacturers (Optibelt etc.).
Since the outer length measures the outer circumference of the V-belt, it can be a helpful reference, especially for manufacturers who use this measurement for selecting and ordering their products.
The effective length (Lw/Ld) describes the effective length of the V-belt, taking into account the diameter of the pulleys. This dimension is measured along the neutral axis of the V-belt, which is neither stretched nor compressed during operation.
The width and height of the belt classify it into the respective profiles, for example SPB, XPB or AVX.
There are some helpful tips for determining the correct V-belt length and profile:
If you already have an old belt, you can read the length and profile directly from the product. Many manufacturers mark the V-belt with a designation that indicates both the profile width and the outer and inner lengths.
Alternatively, you can measure the inner length : Lay the belt flat and measure along the inside of the belt with a measuring tape . This length corresponds to the inner length (Li) of the V-belt.
To determine the profile of a V-belt, there are several methods you can use:
In detail
The V-belt consists internally of a so-called core, which, depending on the design and load requirements, is made special tensile cord
This construction gives the V-belt the necessary friction and durability for continuous power transmission. The outer surface of the V-belt is coated with rubber , which acts as a robust material and protects the belt from external influences.
Brands like PIX, Optibelt or Concar often use a special combination of rubber and fiberglass, which extends the service life and ensures better efficiency.
Here are some of the common profiles and their applications:
Classic V-belts: Standard profiles such as Z, A, B (like B 17), C, D, and E are ideal for general use in drive technology.
Narrow V-belts: With profiles SPZ, SPA, SPB and SPC, they offer higher performance and strength, especially for industrial machinery.
Toothed V-belts: Available in profiles such as XPZ, XPA, XPB and XPC, these are particularly flexible and well suited for smaller pulleys.
Automotive V-belts: Profiles such as AVX10, AVX13 and PK have been specially developed for use in vehicles.
Accu-Link V-belts: These profiles can be joined together in any length, allowing for high flexibility in application without disassembling the machines.
All V-belt profiles are manufactured according to DIN standards, which ensures high quality and accuracy of fit.
More information
Prices vary depending on the profile, size, and manufacturer . Products from reputable manufacturers such as PIX, Optibelt, or Concar are high-quality and offer a long service life.
The unit price may also depend on the desired length and the profile .
For items in stock, delivery usually takes a few days. For custom-made items or items sold by the meter, please allow for a longer delivery time.
Choosing the right V-belt depends on many factors such as dimensions, profile, material and application.
It is advisable to compare the technical details and, if necessary, request advice to ensure that the V-belt is optimally suited to the application.
In the menu of our online shop you will find a wide variety of products, detailed product descriptions and helpful filter functions to make your choice easier.
WANTABELT is establishing a quality management system in all its company-owned manufacturing facilities in accordance with ISO 9001:2008.
This standard also applies to reputable manufacturers of products that are not manufactured in-house, whether through implementation, introduction, or certification. Regarding the conformity of our products with food law regulations, we meet the standards according to (EC) No. 1935/2004 and (EU) No. 10/2011 and FDA. The raw materials we use comply with the requirements of the RoHS Directive EU 2015/863.
