Made-to-Order Sprockets - Tsubaki

Idler Sprockets &Chain TensionersAdjustable Idler Sprockets Are Used To:• Obtain proper chain tension when neither driving nor driven shaft is adjustable.• Guide chain around an obstruction.• Prevent whipping action in the slack span of chain transmitting an uneven load.• Bring about greater chain wrap around a small sprocket, particularly if it is the lower sprocket in a vertical drive.• Take up slack chain caused by normal chain wear.• Provide for reversed direction of rotation of a sprocket in contact with the outside of the chain.Idler sprockets should not rotate at greater speeds than are allowable for drive sprockets of the same size. They should be mounted incontact with the “slack” span of chain, whenever possible. Mount them on the outside of the chain when the arc of chain wrap on thesmaller sprocket would otherwise be less than 120°. It is advisable that idler sprockets have at least three teeth in mesh with the chain.Inside mounted idlers usually account for quieter operation, especially if centers are short and speed is moderately high. Bronze Bushed Sprocket Idlers For Use With All Steel TightenersAll dimensions in inches unless otherwise stated.No. of Outside Catalogue Suggested Chain Hub Bushed WeightTeeth Diameter Number Tightener Number Diameter LTB Bore Diameter (lbs.)151313132119191715171513131513131.9902.3292.3292.9112.7133.2963.2963.7193.9794.4625.3055.8216.9869.2839.31811.64235B15T41B13T40B13T50B13T35B21T41B19T40B19T50B17T60B15T60B17T80B15T100B13T120B13T140B15T160B13T200B13T000011111222233335414050354140506060801001201401602001³⁄₈1⁹⁄₁₆1⁹⁄₁₆22¹⁄₈2⁷⁄₁₆2⁷⁄₁₆2⁵⁄₈2¹¹⁄₁₆2⁷⁄₈3¹⁄₂44¹⁄₂5³⁄₄5³⁄₄5³⁄₄¹⁵⁄₁₆¹⁵⁄₁₆¹⁵⁄₁₆¹⁵⁄₁₆1¹⁄₁₆1¹⁄₁₆1¹⁄₁₆1¹⁄₁₆1¹⁄₁₆1⁹⁄₁₆1⁹⁄₁₆1⁹⁄₁₆1⁹⁄₁₆2¹⁄₂2¹⁄₂2¹⁄₂NOTE: Idlers other than stock furnished on a made-to-order basis.Idler rpm should not exceed 2500 and radial loading should be less than 50 pounds.¹⁄₂¹⁄₂¹⁄₂¹⁄₂⁷⁄₈⁷⁄₈⁷⁄₈⁷⁄₈⁷⁄₈1¹⁄₈1¹⁄₈1¹⁄₈1¹⁄₈1³⁄₄1³⁄₄1³⁄₄.32.52.52.97.821.301.501.802.503.305.605.7013.0027.3026.4058.00OUTSIDE DIAMETERBORELTBSTYLE SHUB DIAMETER1/4" ALEMITE5/16"2GφGLHGJ EPADJUSTING SCREWGREASE PORTHARD & GROUNDIDLER SHAFTDF (ADJUSTABLE)CAKMBSprocketsIf the sprocket needed is not listed above, please contactTsubaki for made-to-order custom sprockets. Chain TensionersAll dimensions in inches unless otherwise stated.Weight *SuggestedSize A B C D E F G 2G H J K L M P (lbs.) Chain#0-B#1-B#2-B#3-B5⁷⁄₈913141¹⁄₂2345¹⁄₄8¹⁄₈11⁷⁄₈12⁵⁄₈.500.8751.1251.75011³⁄₄2⁷⁄₈3¹⁄₈2¹⁄₂4¹⁄₂66* Single-strand chain. For multiple-strand chain, use larger tensioner.⁹⁄₃₂¹¹⁄₃₂⁹⁄₁₆⁹⁄₁₆³⁄₈¹⁄₂³⁄₄³⁄₄2¹³⁄₁₆45¹¹⁄₁₆6¹⁄₄1⁵⁄₁₆1⁵⁄₈2⁵⁄₃₂2³⁄₁₆1³⁄₈1³⁄₄2⁷⁄₈3¹⁄₄1¹⁄₄1¹⁄₂22³⁄₈¹⁄₂⁵⁄₈³⁄₄³⁄₄11¹⁄₂21.02.56.012.0#35,40,41#40,50,60#80,100,120#140,160,200E-119