Rex Linkbelt Roller Chain Catalog - Norfolkbearings.com

Chain rolling or sliding and material carriedLayout BDRIVEP CVVertical elevator with material carriedLayout CP ELDRIVETRAVELLTRACKRTAKE-UPTRACKYFig. 5069TRAVELRThe total conveyor pull (P CV) is the sum of the following:Pull on loaded run:to move load = (W + M)YF PL = (W + M)YF + (W + M)Rto lift load = (W + M)RPull on return run NP R= WYFTake-up pull ∆P TUor P CPull to operate tail sprocket P R× .1Pull from other factors P OCalculate the total chain pull per strand (P T) by dividing P CVbythe number of strands taking the load.RM Disregard when is greater than factor F.Y∆ Usually, the takeup pull is known. If not, use 0.3% of the chain’s ultimatestrength as a reasonable estimate.Horsepower required to operate the conveyorHP = (P CV- P TUor P C) × 1.2 × S33,000TAKE-UPFig. 5073The total elevator pull (P EL) is the sum of the following:Pull on loaded runP L= (W + M)RTake-up pullP TUDigging pullP B= M × sPull to operate tail sprocket P TU× .1Calculate the total chain pull per strand (P T) by dividing P ELbythe number of chain strands used in the elevator.∆ Usually, the takeup pull is known. If not, use 0.3% of the chain’s ultimatestrength as a reasonable estimate.s For material with small lumps, multiply M by the sprocket diameter. For fine orfluffy materials, multiply M by the sprocket radius.Horsepower required to operate the elevatorHP = P EL– (P TU+ WR) × 1.2 × S33,000E77E-7