In general, conveyor chains are operated for longer distances and at lower speeds than transmission chains. Accordingly, though the pins, bushings and rollers are left unchanged, and the plate pitch is doubled to reduce the amount of sprocket teeth engaged with the chain to half, the dress in of pins, bushings and rollers is compact because the chain velocity is low. Double Pitch Chains, conform to ANSI normal and “Ultimate Existence Chain Series” and “Environment Resistant Chain Series”, as are single pitch chains may also be obtainable.
Double pitch chain with resin rollers
This can be a Double Pitch Chain with R Roller made from resin, which generates significantly less noise and lighter fat compared with steel rollers. So, the chain is appropriate to get a conveyor program developed to operate 
quietly and convey light-weight articles or blog posts. Because the components besides rollers are manufactured from steel, the average tensile strength of the resin roller chain is the identical as that of the steel roller chain. However, the “maximum allowable load” from the chain needs to be kept reduce, as proven inside the following table, to avoid damage on the plastic rollers by the strain from the engagement with sprockets.
The “Allowable load of resin rollers” refers to your allowable load acting when conveyed posts press the resin rollers traveling on the floor surface such as guid rails.
Huge roller (R) and little rollers (S)
Considering that double pitch chains are commonly used for conveying goods on a horizontal floor, chains created for this function have greater roller diameter equal to that of single pitch chains in the identical pitch for increased load capacity and reduced traveling resistance. These rollers with greater outer diameter are named “large rollers”, and the regular rollers are called “small rollers”.
In this catalog, large rollers are expressed as R Roller, and smaller rollers as S Roller.
Designation of double pitch chains
A double pitch chain is designated, as during the following example, depending on the nominal amount of the single pitch chain it is actually according to.
Connecting links
For the connecting back links of double pitch chains of all sizes, the connecting plates and connecting pins are clearance-fitted. For C2060H or smaller, the spring clip style (R connecting hyperlink) is common. For C2080H or larger, the cotter style (C connecting link) is standard. Connecting back links with an attachment, leading roller or side roller can also be available.