Sunday, February 22, 2009

Renold Roll-Ring: Self Adjusting Chain Tensioner

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 asborbs 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.
Vibrations in an untensioned chain drive

The Roll-Ring® chain tensioner tensions and dampens

The Roll-Ring® chain tensioner provides cost effective, time saving installation and maintenance.
The advantages over other types of chain tensioners are:
  • Free standing - no sprockets, bolts, plates, drilling or costly installation required.
  • The Roll-Ring® is easily installed where space limitations prohibit the use of conventional chain tensioners.
  • The Roll-Ring® is fitted in a matter of seconds.
  • It is ready for use without any tools, tensioning equipment or any further alignment or adjustment.
  • It is fully effective in vertical and diagonal drives.
  • The Roll-Ring® works automatically, is maintenance free and self lubricating.
  • It can be used in dusty and dirty environments.
  • The Roll-Ring® is a tensioner and damper in one, thus reducing noise levels.
  • Roll-Ring® also works in reverse mode. Roll-Ring® chain tensioners reduce chain wear and improve the quality and efficiency of the complete chain drive.
The innovative Tensioner
The Roll-Ring® chain tensioner is an elementary mechanism based on new principles and represents a major advance in technology:
  • Roll-Ring® requires minimal technical effort.
  • Its operation is astonishingly simple.
  • All functions are integrated into a single component.
  • Roll-Ring® utilises the hollow space of the associated chain drive system giving greater flexibility to designers and specifiers.
  • Automatic positioning and self lubricating.

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