DRIVE CHAINS - Tsubaki

Before Use For Safe UseStandard Roller Chains Lube-Free Roller Chains Heavy Duty Roller Chains Corrosion Resistant Roller Chains Specialty Roller Chains Accessories Selection HandlingWhen idlers or tensioners are used, the contactarea will be the center of the tooth bottom.B: ImproperinstallationWhen wear on the teeth reaches the values in thefollowing table, the lifespan of the sprocket hasbeen reached. For a sprocket with inductionhardned teeth, the lifespan is reached when thehardned layer has been removed.RS 11-SS-1 0.6 15-1 1.1 25-1 1.5 35-1 2.5 41-1 2.6 40-1 2.5 3.1 50-1 2.9 3.6 60-1 3.7 4.6 80-1 5.0 6.3100-1 6.9 8.6120-1 8.7 10.9140-1 10.6 13.3160-1 12.4 15.5180-1 11.3 14.1200-1 12.6 15.8240-1 15.1 18.9RF320-T-1 19.9 24.9RF400-T-1 24.9 31.2Improper installation causesthe surface of the teeth tobecome ground downFig. 27 Contact area of the sprocket teethLimit of usage based on tooth thickness/Dimension B (Table 8)Size of RSRoller ChainDimension BNormalForward and reversePin-GearSize of BSRoller ChainDimension BNormalRF06B-1 1.6RS08B-1 2.110B-1 2.912B-1 3.616B-1 5.020B-1 6.824B-1 7.228B-1 8.632B-1 11.940B-1 12.7One directionIf a new roller chain is run on a worn sprocket, thechain will wear at a faster rate than normal. In thiscase, when replacing the chain, replacement ofthe sprocket is also recommended.6) Inspection of chain elongationChain elongation is caused not by deformation ofthe link plate, but by wear on the pin and bush.Therefore, the remaining chain life can beestimated by periodically measuring the chainelongation.Measuring chain elongation(1) The chain should be measured whilst stretchingit slightly to eliminate any slack.(2) Measure the distance of the inside (L1) andoutside (L2) of the rollers at both ends ofthe measured links using a vernier to get ameasurement (L).L L 1L 22(3) When measuring, use at least 6 to 10 links tohelp keep any measuring error down to aminimum.Positioning of vernier callipers for measuring 6 linksRollerFig. 28 Measurement of length(4) Finding the chain elongationChain elongation (%) =Measured length - Standard lengthStandard length100Standard length = Chain pitch X Number of links(5) For multi-strand roller chain, the measurementis carried out in the same way as for singlestrand roller chain of the same pitch.(6) The limit of usage based on roller chainelongation for a smooth transmission is asfollows.Limit of usage based on elongation (table 9)Large sprocket with up to 60 teethLarge sprocket with between 61 - 80 teethChain elongation 1.5Chain elongation 1.2Large sprocket with between 81 - 100 teethLarge sprocket with between 101 - 110 teethChain elongation 1.0Chain elongation 0.8167