Normally, conveyor chains are operated for longer distances and at lower speeds than transmission chains. Accordingly, even though the pins, bushings and rollers are left unchanged, as well as plate pitch is doubled to reduce the number of sprocket teeth engaged together with the chain to half, the wear of pins, bushings and rollers is tiny since the chain speed is very low. Double Pitch Chains, conform to ANSI common and “Ultimate Life Chain Series” and “Environment Resistant Chain Series”, as are single pitch chains can also be readily available.
Double pitch chain with resin rollers
This is a Double Pitch Chain with R Roller manufactured from resin, which generates less noise and lighter fat in contrast with steel rollers. Hence, the chain is suitable for a conveyor procedure developed to operate quietly and convey light-weight articles. Because the components aside from rollers are manufactured from steel, the typical tensile power of the resin roller chain will be the identical as that of the steel roller chain. On the other hand, the “maximum allowable load” of your chain need to be kept decrease, as shown while in the following table, to avoid injury for the plastic rollers by the stress in the engagement with sprockets.
The “Allowable load of resin rollers” refers towards the allowable load acting when conveyed posts press the resin rollers traveling on the floor surface 
this kind of as guid rails.
Large roller (R) and smaller rollers (S)
Considering the fact that double pitch chains are commonly utilized for conveying goods on a horizontal floor, chains developed for this goal have increased roller diameter equal to that of single pitch chains of your identical pitch for elevated load capacity and reduced traveling resistance. These rollers with larger outer diameter are known as “large rollers”, along with the common rollers are called “small rollers”.
Within this catalog, large rollers are expressed as R Roller, and compact rollers as S Roller.
Designation of double pitch chains
A double pitch chain is designated, as inside the following illustration, based upon the nominal quantity of the single pitch chain it is depending on.
Connecting links
For the connecting backlinks of double pitch chains of all sizes, the connecting plates and connecting pins are clearance-fitted. For C2060H or smaller, the spring clip sort (R connecting link) is common. For C2080H or greater, the cotter style (C connecting hyperlink) is conventional. Connecting backlinks with an attachment, prime roller or side roller may also be accessible.