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Understanding Self-Tensioning Stretch Belts

Because of their self-tensioning properties, stretch belts are meant to be a one-time-use component.

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In 2009, with the introduction and addition of a separate two-pulley drive, manufacturers began adding a new type of belt to the accessory-drive system: the stretch Belt.  

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While they may look the same as a conventional serpentine belt on the outside, these belts have a unique internal construction that allows them to function without the need for a mechanical tensioner to maintain constant belt tension.  

Eliminating the need for a tensioner allows automotive engineers to reduce the number of components that share the primary belt drive, reduce belt-drive friction losses, save weight and design more compact accessory drives.

This video is sponsored by The Pronto Network.     

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