Chain and belt tensioner
max. 10 200 m/s | ROLL-RING®
RENOLD
Self-adjusting chain tensioner
Roll_Ring_flash
ROLL-RING® is a simple yet innovative chain tensioner made from a specially formulated polymer. The unique design is based upon a simple toothed ring that can be fitted to horizontal, vertical or diagonal drives in a matter of seconds, simply by placing it in-between the two strands of chain. When the drive is in use, the ROLL-RING® deforms to an elliptical shape, due to compression between the strands and completely absorbs any slack in the system. ROLL-RING® performs the job of a tensioner and a damper in one, and is ideally suited to applications where maintenance is difficult or impossible.
Roll-Ring - without
Vibrations in an untensioned chain drive
Roll-Ring - with
The ROLL-RING® chain tensioner tensions and dampens
ROLL-RING® chain tensioners provide tensioning using:
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Static tensioning force from the elastic ring-
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Dynamic tensioning force from the damping of the working material
ROLL-RING® provides as much tensioning as possible at low chain speeds, and has reserves of tensioning and damping capability for higher chain speeds. The diagram below shows the tensioning force of a ROLL-RING® chain tensioner with its individual allocations of tensioning forces and their resulting effects.
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