Chain In depth
Today, Renold Chain has a multitude of innovative features to cope with the most demanding operating environments.
exploded view of all roller chain components
Chain is a series of journal bearings joined together, by side plates. This bearing is where the chain wear occurs and where lubrication is needed.
Rollers can either be curled (i.e. made from sheet curled round) or be solid (made from bar and extruded). Solid rollers give improved resistance to shock loading and fatigue. Curled rollers are normally more concentric but are sometimes forced to open under heavy load.
Bushes, as with rollers, can be either curled or solid with the same benefits and drawbacks as a roller. Normally heat treated to improve wear, and sometimes coned to make the bore parallel when pushed with an interference fit into the inner plates.
Pins are normally ground to give a smooth surface for improved wear. They are “through hardened” for resistance to heavy loading or “case hardened” for a hard surface finish but a softer more flexible core. Riveted after fixing through the outer plate. Renold chains have softened ends to make disassembly of the chain easy.
When the first three components are assembled, this becomes the inner link.
The final part of the chain assembly is the outer link.