There are actually two types of links alternating in the bush roller chain. The initial type is internal links, having two inner plates held collectively by two sleeves or bushings upon which rotate two rollers. Internal links alternate with the 9k=second type, the external links, comprising two outer plates held with each other by pins passing through the bushings of the internal links. The “bushingless” roller chain is comparable in procedure though not in building; instead of individual bushings or sleeves holding the inner plates with each other, the plate has a tube stamped involved with it protruding from the hole which serves the same purpose. This has the advantage of removing one part of assembly of the chain.

The roller chain design reduces friction in comparison to simpler designs, leading to higher efficiency and less wear. The original power transmission chain types lacked rollers and bushings, with both inner and outer plates kept by pins which straight contacted the Conveyor Chain sprocket tooth; nevertheless this configuration exhibited incredibly rapid put on of both sprocket teeth, and the plates where they pivoted on the pins. This issue was partially solved by the advancement of bushed chains, with the pins holding the outer plates passing through bushings or sleeves linking the inner plates. This distributed the put on over a larger area; however the teeth of the sprockets still wore quicker than is desired, from the sliding friction against the bushings. The addition of rollers encircling the bushing sleeves of the chain and supplied rolling contact with one’s teeth of the sprockets leading to excellent resistance to put on of both sprockets and chain aswell. There is even suprisingly low friction, as long as the chain can be sufficiently lubricated. Continuous, clean, lubrication of roller chains is usually of primary importance for efficient operation and also correct tensioning.