Choose the right belt!


Choisir la bonne courroie

Looking for the right belt for your application?

 

The purpose of this guide is to show you the different types of belts available on the market.
It includes detailed technical information and advice to help you choose the right belt for your application and budget.

- Belt types

- Belt identification

- How to measure my belt

- FAQ

- Download PDF

Critères de choix d'une courroie
Comment choisir une courroie ?

Looking for a durable, reliable and affordable belt?

Choose the perfect belt for your needs!

 

The purpose of this guide is to show you the different types of belts available on the market.
It includes detailed technical information and advice to help you choose the right belt for your application and budget.

 

 

Belt types


To choose the right belt, it's essential to familiarize yourself with the various options available. Belts are distinguished by their profile: trapezoidal, toothed, flat, V-shaped or cabled. Each type of belt has specific characteristics such as material, width and manufacturing quality. A thorough understanding of these distinctions will enable you to make an informed choice when selecting the right belt.

Discover the different types of belts and their functionalities:

Flat belts

V-belts

Ribbed belts

Synchronous belts


  • Ideal for power transmission applications.
  • Allows high-speed transmission at low effort.
  • These are the most widely used power transmission belts.
  • Ideal for low-power transmission or light-load conveying applications.
  • Elastic, they require no tensioning system.
  • Stripped lengthwise, it increases the contact surface with the pulley, thus limiting slippage.
  • Combines the flexibility of flat belts with the excellent power characteristics of V-belts.
  • Used in many industrial and agricultural machines.
  • Prevents phase shift.
  • Its length must correspond to the pulley diameter, otherwise power is lost.

  • Very low torque and efficiency between 50 and 95%
  • Low torque and efficiency between 70 and 96%
  • Moderate torque and wide power range (0 to 600 KW)
  • Average torque and efficiency below 96%

  • In the case of large pulleys, wide, flat belts can deliver high power at high speeds (373 KW at 51 m/s).
  • Very quiet operation.
  • Long service life.
  • Allows large center distances.
  • The belt can't get out of the groove
  • It's not very wide, so it doesn't take up much space.
  • It needs less tensioning.
  • A multiple-belt drive is possible for high-power requirements, by assembling two or more V-belts.
  • Long life and reliability.
  • Quiet transmission.
  • Several gear ratios available.
  • Guarantees slip-free operation.
  • Accepts a wide range of speeds: supports low speeds very well.
  • Allows better transfer of effort to the pulley.
  • Easy to use, quick to install.

  • Requires high tension maintenance.
  • Tends to slip on pulley face when heavy loads are applied.
  • There are several sub-families:
  • Classic wrapped smooth
  • Classic notched, "SP" wrapped healds, narrow notched healds.
  • Not very economical
  • Its one-piece structure ensures even distribution of belt tension on the pulley.
  • Models are available with single or double teeth.
  • The type of material influences product performance: neoprene (high power and torque) or polyurethane (transmits greater power and torque than neoprene) and torque than neoprene).

Flat belts

image courroie plates

Function

  • Ideal for power transmission applications.
  • Allows high-speed transmission at low effort.

Performance

  • Very low torque and efficiency between 50 and 95%

Advantage

  • In the case of large pulleys, wide, flat belts can deliver high power at high speeds (373 KW at 51 m/s).
  • Very quiet operation.
  • Long service life.
  • Allows large center distances.

To know more

  • Requires high tension maintenance.
  • Tends to slip on pulley face when heavy loads are applied.

V-belts

image courroie trapezoidale

Function


Performance

  • Low torque and efficiency between 70 and 96%

Advantage

  • The belt can't get out of the groove
  • It's not very wide, so it doesn't take up much space.
  • It needs less tensioning.
  • A multiple-belt drive is possible for high-power requirements, by assembling two or more V-belts.

To know more

  • There are several sub-families:
  • Classic wrapped smooth
  • Classic notched, "SP" wrapped healds, narrow notched healds.

Ribbed belts

image courroie striée

Function

  • Stripped lengthwise, it increases the contact surface with the pulley, thus limiting slippage.
  • Combines the flexibility of flat belts with the excellent power characteristics of V-belts.

Performance

  • Moderate torque and wide power range (0 to 600 KW)

Advantage

  • Long life and reliability.
  • Quiet transmission.
  • Several gear ratios available.

To know more

  • Not very economical
  • Its one-piece structure ensures even distribution of belt tension on the pulley.

Synchronous belts

image courroie synchrone

Function

  • Used in many industrial and agricultural machines.
  • Prevents phase shift.
  • Its length must correspond to the pulley diameter, otherwise power is lost.

Performance

  • Average torque and efficiency below 96%

  • Guarantees slip-free operation.
  • Accepts a wide range of speeds: supports low speeds very well.
  • Allows better transfer of effort to the pulley.
  • Easy to use, quick to install.

To know more

  • Models are available with single or double teeth.
  • The type of material influences product performance: neoprene (high power and torque) or polyurethane (transmits greater power and torque than neoprene) and torque than neoprene).

Identifying the right belt


 

To find the right belt, it's essential to take into account cross-section and length required.

Itafran offers a wide selection of belts, conveniently organized by section, to simplify your search. You'll find them all grouped together in the "Belts" category of our site. Simply measure the specifications of your model to determine the appropriate section, then choose the corresponding length from the options on offer.

In this way, you can easily find the right belt for your specific needs, ensuring perfect compatibility with your equipment.

Etapes du choix d'une courroie
Etapes de choix d'une courroie

I.How to identify a belt


II. How to measure my belt ?


 

Using your tape measure, measure the outside length of your belt in straight lines only. Do not measure by bending the belt in an arc. Take a mark, stretch the belt as far as it will go to make a straight line, hold the tape measure, and repeat the straight line until you reach your starting mark.

Is your belt closed?


Mesurer la courroie

Using your tape measure, measure the outside length of your belt in straight lines only. Do not measure by bending the belt in an arc. Take a mark, stretch the belt as far as it will go to make a straight line, hold the tape measure, and repeat the straight line until you reach your starting mark.

Is your belt cut in two?


Mesurer la courroie

Using a mother-of-pearl or ruler, measure the length of the belt flat from end to end.
This is your outside length.

Don't you have a belt?


Mesurer la courroie

Using a string or your tape measure, mark the path travelled by your belt, staying on the outside of your pulleys (do not go to the bottom of the groove), with the position of the turnbuckles at a minimum. This measurement corresponds to the outside length of your belt.

Do you have a belt-measuring ruler?


Règle à mesurer la courroie

To measure your belt, follow the steps below:

1- Position the belt on the belt selector and tighten to maximum tension

2- Determine the cross-section by means of the half pulley on the right-hand side

 

To determine belt length :

- Read the rectangular section (left-hand side)

II. How to measure my belt ?


 

Using your tape measure, measure the outside length of your belt in straight lines only. Do not measure by bending the belt in an arc. Take a mark, stretch the belt as far as it will go to make a straight line, hold the tape measure, and repeat the straight line until you reach your starting mark.

Is your belt closed?


ma courroie est fermée

Using your tape measure, measure the outside length of your belt in straight lines only. Do not measure by bending the belt in an arc. Take a mark, stretch the belt as far as it will go to make a straight line, hold the tape measure, and repeat the straight line until you reach your starting mark.

Is your belt cut in two?


image courroie coupée en deux

Using a mother-of-pearl or ruler, measure the length of the belt flat from end to end.
This is your outside length.

Don't you have a belt?


Choisir une courroie

Using a string or your tape measure, mark the path travelled by your belt, staying on the outside of your pulleys (do not go to the bottom of the groove), with the position of the turnbuckles at a minimum. This measurement corresponds to the outside length of your belt.


image d’un règle

To measure your belt, follow the steps below:

1- Position the belt on the belt selector and tighten to maximum tension

2- Determine the cross-section by means of the half pulley on the right-hand side

 

To determine belt length :

- Read the rectangular section (left-hand side)


 

By following these tips, you should be able to choose the belts that are best suited to your application, and that operate safely and efficiently.

 

If you have any questions or comments on this definition, please use this form. Thank you in advance!

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FAQ


What's the best way to choose a belt?

The best way to choose a belt is to take into account factors such as the type of machinery, the required tension, and the length and width of the belt. It's also important to check that the belt is compatible with your application, and that it's made of a material suitable for your application.

How long does a belt last?

The service life of a belt depends on a number of factors, such as the quality of the belt, the materials used in its manufacture, the application for which it is used, environmental conditions, load and belt tension. Overall, belt life can range from a few months to several years

When should a belt be replaced?

It's important to monitor the condition of the belt regularly, as it should be replaced when its maximum service life is reached, or when signs of wear or damage are detected, or when it is no longer able to deliver the required power.

What is the coefficient of friction?

The coefficient of friction in a belt represents the force of friction between the belt and the pulley on which it rests. It is important in power transmission because it determines the adhesion between the belt and the pulley.

  • If the coefficient is low: the belt can slip on the pulley, reducing transmission efficiency
  • If the coefficient is too high: this can cause premature belt and pulley wear.

What is belt tension?

Belt tension is the force that holds the belt taut between two pulleys. Tension is important because it holds the belt in place and ensures efficient power transmission.

There are two types of tension in a belt:

  • Static tension, which is the initial tension of the belt when it is installed on the pulleys,
  • Dynamic tension, which is the tension that develops when the belt is in motion