Collection: Automotive Fan Belts

Automotive Fan Belts and Multi V Belts

How to fit a fan belt

A belt is a loop of flexible material used to link two or more rotating shafts mechanically, most often parallel. Belts may be used as a source of motion, to transmit power efficiently or to track relative movement. Belts are looped over pulleys and may have a twist between the pulleys, and the shafts need not be parallel.

V belts have solved the slippage and alignment problem. It is now the basic and most common belt for power transmission. They provide the best combination of traction, speed of movement, load of the bearings, and long service life. They are generally endless, and their general cross-section shape is roughly trapezoidal (hence the name "V"). The "V" shape of the belt tracks in a mating groove in the pulley, with the result that the belt cannot or should not slip off. The belt also tends to wedge into the groove as the load increases. A greater load actually causes a greater wedging action that improves torque transmission and makes the V-belt an effective solution, needing less width and tension than flat belts. V-belts trump flat belts with their small center distances and high reduction ratios.

For high-power requirements, two or more V-belts can be joined side-by-side in an arrangement called a multi-V, running on matching multi-groove sheaves. This is known as a multiple-V-belt drive 

Multi groove belt

 

Then comes the  multi-groove, V-Ribbed, or poly groove belt is made up of usually between 3 and 24 "V" shaped sections alongside each other. This gives a thinner belt for the same drive surface, thus it is more flexible, although often wider. The added flexibility offers an improved efficiency, as less energy is wasted in the internal friction of continually bending the belt. In practice this gain of efficiency causes a reduced heating effect on the belt, and a cooler-running belt lasts longer in service. Belts are commercially available in several sizes, with usually a 'P' (sometimes omitted) and a single letter identifying the pitch between grooves. The 'PK' section with a pitch of 3.56 mm is commonly used for automotive applications.

A further advantage of the polygroove belt that makes them popular is that they can run over pulleys on the ungrooved back of the belt. Though this is sometimes done with V-belts with a single idler pulley for tensioning, a polygroove belt may be wrapped around a pulley on its back tightly enough to change its direction, or even to provide a light driving force.

If you are unsure please visit our part number catalog in the index.

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9 products
  • Multi Groove Belt 5PK1765
    Multi Groove Belt 5PK1765
    Regular price
    R 266.20
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    R 266.20
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  • Fan Belt Adjustable Size PG718
    Fan Belt Adjustable Size PG718
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    R 129.95
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    R 129.95
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  • Fan Belt Adjustable To Fit Size PG221
    Fan Belt Adjustable To Fit Size PG221
    Regular price
    R 59.95
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    R 59.95
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  • Fan Belt Adjustable Size PG217
    Fan Belt Adjustable Size PG217
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    R 48.95
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    R 48.95
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  • Fan Belt Adjustable Size PG218
    Fan Belt Adjustable Size PG218
    Regular price
    R 51.95
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    R 51.95
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  • Multi v Belt 4PK875 Multi Groove Fan belts
    Multi v Belt 4PK875 Multi Groove Fan belts
    Regular price
    R 71.95
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    R 71.95
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  • Multi v Belt 5PK865 Multi Groove Fan belts
    Multi v Belt 5PK865 Multi Groove Fan belts
    Regular price
    R 99.95
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    R 99.95
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  • Multi v Belt 6pk1570 Multi Groove belts
    Multi v Belt 6pk1570 Multi Groove belts
    Regular price
    R 209.95
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    R 209.95
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  • Multi v Belt 4pk850 Multi poly groove belts
    Multi v Belt 4pk850 Multi poly groove belts
    Regular price
    R 69.95
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    R 69.95
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