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Tension Roller

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Tension Roller 

(idler), a loose pulley mounted on a mobile axle and intended to maintain belt tension and to increase the span angle of the small pulley of a belt transmission. Transmissions with tension rollers are used in cases where the distance between the axles is small or the transmission ratio is high. Tension rollers should be installed on the driven side of the belt near the small pulley. The disadvantage of transmissions with tension rollers is a decrease in the service life of the belt because of additional flexure.



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Before the coating experiment, the two tension rollers F and F' were positioned such that the substrate just touched the slot die exit, and the substrate was kept in a horizontal position.
A tension roller system helps the barrier easily extend or be placed in its active position by dock personnel, To place the unit in the active position, a dock attendant walks the barrier across the opening and positions it in the latch bracket.
 
 
 
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