DRIVE CHAINS - Tsubaki

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Before Use For Safe UseStandard Roller Chains Lube-Free Roller Chains Heavy Duty Roller Chains Corrosion Resistant Roller Chains Specialty Roller Chains Accessories Selection Handling6. Chain Test RunAfter installing the chain, carry out a test run and check the following items before you actually start running the chain.6.1 Pre-Test Run1) Connecting link plates, clips, and cotter pins areinstalled correctly.2) Chain slack has been properly adjusted.3) Adequate lubrication is available.4) The chain is not touching the chain case.5) The roller chain path is clean and free from obstructions.Step Step Step 6.2 Test-Run1) There should be no strange noises. Make sure thechain does not touch the case.2) Look for excessive chain vibration.3) Make sure the chain does not run up on the sprockets.4) Ensure that the chain is not jammed into the sprockets.5) The chain should articulate smoothly.Check the inspection items if there are any problems, and ensure roller chain and sprocket are correctly installed.7. Roller Chain Inspection1) In general, life of roller chain is said to be reached when parts are damaged or when 1.5% wear elongationoccurs. See 6) in 7.3. Try to replace the chain before these conditions occur.2) If roller chain selection and operating conditions are suitable, you can expect rather long life with nounexpected trouble from the chain. However, wear will progress between the pins and bushes after longperiods the following should be noted and inspected.7.1 Inspection Checklist (Table 7)ProceduresMethodVisually check the chainduring operation and lookfor any abnormalities.Stop the chain andcarefully inspect eachpart of the chain andsprocket.Inspection items1. There should be no strange noises.2. Look for excessive chain vibration.3. Make sure the chain does not run up the sprockets.4. The chain is not jammed into the sprockets.5. There are no stiff areas during articulation.6. Adequate lubrication is available (lubricating system and quantity of oil).7. Make sure the chain doesn't touch the case.1. Check the external cleanliness, corrosive, and lubrication conditions; also,look for scratches or other damage to the plate side and edge surfaces, pinedges, and roller surfaces.2. Inspect for pin rotation and the clearance between the plate and the pins.3. Inspect the sprocket teeth surfaces and teeth side surfaces for scratches or marks.4. Measure the wear elongation of the chain.5. Check the articulation of the chain and rotation of the rollers.6. When using an end fitting for lifting applications, inspect the wear of the endbolts and the wear of the connecting plate pins. Also, check for proper installationat the same time.In order to investigate in moredetail, remove the roller chain1. The inspection items are identical to those in Step except in more detail.and inspect it visuallly or checkit with measuring instruments.Reference pagefor detailsInspectionpoints are on thefollowing pagesand on thetroubleshootingpages.165
Handling of roller chain and sprocket7.2 Inspection intervalsRegular inspection of roller chain is recommend atone month intervals. Inspection should be carried outat shorter intervals in:1)2)3)Special or corrosive environments.High speeds with sudden stoppage.Lifting or indexing operations.7.3 Inspection requirements for ordinary transmission1) Inspection lubrication conditionsDuring operation, check to see if there is lubrication inthe clearance between the outer plate and inner plate.Also, check if the chain or rotating disc is immersed inlubricating oil.When the chain is stationary, the chain surface willgenerally appear dirty from wear dust if lubrication isunsatisfactory. This is especially the case between thelink plates.When the chain is removed, connecting link pins and theedge of the inside of the bushes should be checked. Ifthere are any scratches, red or reddish-brown color,lubrication is improper or insufficient.2) Inspecting link platesIf repeated loads over the maximum allowable loadare put on the chain, there is a strong possibility offatigue breakage of the link plate. It is difficult tonotice initial cracking from fatigue breakage simplyfrom external observation.Usually, a crack develops at the edge of a holeor at the side of the link plate, as shown in theillustrations below. The presence of cracks shouldbe checked carefully. Fatigue breakage progresseslittle by little, so it can be noticed with closeattention.Positions where cracksare likely to developFig. 23 Cracks on the link platesExample of a crackWhen wear occurs from sliding between the edgesof the plates and the guides, it is necessary toadjust the position of either the chain or theguides. The allowable wear on the link plates islimited to 5% of their height.H 5Fig. 24 Wear on the edges of the link plates3) Inspecting PinsWhen the pins rotate, the roller chain must becompletely replaced with new chain. This alsoapplies to the connecting pins. By removing theconnecting parts it is possible to see the conditionsof wear and rust on the surfaces of the pins.Correct position Rotated positionFig. 25 Rotation of the pins4) Inspecting rollersAs with the link plates, if rollers are also subjectedto loads over the maximum allowable load, therepeated impact load between the chain and thesprockets may cause fatigue breakage to occur.The roller should be checked in the same way asthe link plate.If foreign objects interfere with the engagement ofthe roller and sprocket, the roller may be damagedand a crack may develop. Careful attention shouldbe paid to the above. Furthermore, with high-speedoperations, even if foreign objjects do not interferewith engagement, cracks may appear from theimpact with the sprocket teeth.Fig. 26 Cracks on the rollersChains damaged by fatigue breakage from therollers must be completely replaced, as each parthas received the same amount of repeated load.Also check for poor roller rotation.5) Inspecting sprocketsChain and sprocket engagement can bechecked by observing the roller and teethsurface. Proper engagement is when the contactarea is uniform with point A in the illstration. If thecontact area is lopsided or the sides of the teethare wearing away (point B), this may have beencaused from improper installation of thesprockets or twisting of the roller chain. In thiscase, rechecking/readjustment is necessary.The normal point of impact is slightly up from thetooth bottom. However, when initial tension isapplied to the chain and tension remains on theslack side, the roller will slightly touch the toothbottom. However, point A receives the strongestimpact.Before Use For Safe Use Standard Roller Chains Lube-Free Roller Chains Heavy Duty Roller Chains Corrosion Resistant Roller Chains Specialty Roller Chains Accessories Selection Handling166
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Tsubaki: RecognizedProvider forBasi
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RThe Powerful Tsubaki LineBecause i
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ContentsBefore UseNotes on Using Ro
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Before UseT S U B A K I D R I V E C
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GlossaryT S U B A K I D R I V E C H
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T S U B A K I D R I V E C H A I NRo
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T S U B A K I D R I V E C H A I NRo
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Before Use For Safe UseStandard Rol
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T S U B A K I D R I V E C H A I N4.
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"World’s No. 1"kilowatt ratings b
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Standard Roller ChainsOld-New Chain
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Standard Roller ChainsRS25, BF25-H
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Standard Roller ChainsRS35 Sprocket
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Standard Roller ChainsRS100 Sprocke
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Standard Roller Chains RS Roller Ch
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Standard Roller ChainsRF320-T, RF40
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Standard Roller ChainsBS/DIN Standa
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BS/DIN Standard RS Roller ChainsKil
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BS/DIN Standard RS Roller ChainsKil
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Lube-Free Roller ChainsLambda Chain
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Lube-Free Roller ChainsX-Lambda Cha
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Lube-Free Roller ChainsKilowatt Rat
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Lube-Free Roller ChainsHeavy Duty L
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Lube-Free Roller ChainsCurved Lambd
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Lube-Free Roller ChainsKilowatt Rat
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T S U B A K I D R I V E C H A I NHe
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Heavy Duty Roller Chains RS-HT Chai
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Heavy Duty Roller Chains SUPER Roll
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Heavy Duty Roller Chains ULTRA SUPE
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T S U B A K I D R I V E C H A I NBe
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Corrosion Resistant Roller ChainsOl
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Corrosion Resistant Roller Chains S
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Corrosion Resistant Roller Chains S
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Corrosion Resistant Roller ChainsTi
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Corrosion Resistant Roller Chains L
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Corrosion Resistant Roller ChainsLo
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Page 116 and 117: Specialty Roller ChainsLeaf ChainsB
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Page 122 and 123: Pin Gear SprocketBefore Use For Saf
Page 124 and 125: Before Use For Safe UseStandard Rol
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Page 132 and 133: Roller Chain SelectionBefore Use Fo
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DRIVE CHAINS - Tsubaki

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