Rex Linkbelt Roller Chain Catalog - Norfolkbearings.com

Conveyor EngineeringSelection ProcedureEither standard or Double Pitch Roller chains, with suitableattachments, are most often used for conveying applications.Numerous attachments are available to accommodate slats,crossrods, and other commonly used conveying devices. Theprocedure for selecting the roller chains listed in Table 6 follows.Roller chain selection procedurePreliminary information • Although chain pull and speed arethe prime considerations in selecting a roller chain for conveyorservice, the following information is also required.Type of conveyorConveyor speed, feet per minute (FPM)Approximate center distance between shafts, feetApproximate diameter and bore of sprockets, inchesWeight of material to be conveyed, per conveyor footKind of material to be conveyedWeight of carriers (slats, pans), per conveyor footSize and spacing of carriersType of attachmentWith this information, the selection procedure is as follows:Select the layout • Refer to pages E-6 and E-7 and select theappropriate conveyor layout.Calculate the approximate conveyor pull • Calculate theapproximate conveyor pull from the formula accompanyingthe layout. Since a chain has not yet been selected, value Wwill include the weight of slats, pans, or other carriers, and anapproximate chain weight of 2 pounds per foot for each strand.Also, assume a takeup tension of 40 pounds for each strand ofchain.Establish the working factor • Select a working factor basedon the operating speed of the conveyor. The factors listed belowapply to evenly loaded, well lubricated chains operating in aclean, non-abrasive atmosphere, and in a normal temperatureenvironment. Increase the listed factors to compensate for anydeviation from the operating conditions specified above.Chain speed, Working factor Chain speed, Working factorfeet per Carbon† Stainless + feet per Carbon† Stainless +minute steel chain steel chain minute steel chain steel chainUp to 50 7 28 150 to 200 12 4850 to 100 8 32 200 to 250 14 56100 to 150 10 40 250 to 300 16 64† Assumes good lubrication.+ Assumes minimum lubrication.ETable 6 • Ultimate strengths and weightsType of chainStandarddiameterrollersAverage ultimate strength,Chain NumberWeight per foot, poundsChainpoundsLarge diameterpitch,StandardrollersCarbon StainlessLarge diameter rollersinchesdiametersteel chain steel chainSteel Delrin rollers Steel Delrin35 . . . . . . . . . . . . 3.75 2,100 1,550 .22 . . . . . .40 . . . . . . . . . . . . .500 3,700 2,800 .39 . . . . . .50 . . . . . . . . . . . . .625 6,100 5,000 .70 . . . . . .Standard 60 . . . . . . . . . . . . .750 8,500 7,000 1.02 . . . . . .Roller 80 . . . . . . . . . . . . 1.000 14,500 12,000 1.67 . . . . . .chain 100 . . . . . . . . . . . . 1.250 26,000 18,750 2.72 . . . . . .120 . . . . . . . . . . . . 1.500 34,500 . . . 3.72 . . . . . .140 . . . . . . . . . . . . 1.750 48,500 . . . 4.69 . . . . . .160 . . . . . . . . . . . . 2.000 68,000 . . . 6.12 . . . . . .C 2040 C 2042 C 2042 DR 1.000 3,700 3,000 .32 .56 .33Double- C 2050 C 2052 C 2052 DR 1.250 6,100 5,000 .51 .83 .65Pitch C 2060H C 2062H C 2062H DR 1.500 8,500 6,800 1.05 1.55 1.04Conveyor C 2080H C 2082H C 2082H DR 2.000 12,500 12,000 1.67 2.35 1.63chain C 2100H C 2102H C 2102H DR 2.500 29,000 18,750 2.55 3.85 2.43C 2120H C 2122H C 2122H DR 3.000 41,500 27,000 3.57 6.22 3.47C 2160H C 2162H C 2162H DR 4.000 70,000 47,000 6.18 9.34 5.60° Maxmimum safe working load. The safe working load varies with chain speed. Consult Rexnord Industrial Chain for selection.† Recommended maximum working load.E-4