DRIVE CHAINS - Tsubaki
DRIVE CHAINS - Tsubaki 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 Handling9.3 Pin RelatedSymptom Possible Causes RemedyBreakage of pin.Static fractureThe type of fracture foundwhen subjecting the chain tothe breakage test. Occurs whenchain is subjected to a loadgreater than its breakage strength.Pin rotates or begins tostick out.NormalWear or rust occurs onlyat the connecting pin ina lifting application orsimilar operation.Excessively large shock loads.Subject to a repetitive load greaterthan the fatigue limit of the pin.Corrosion.Fatigue fractureOccurs when the pin is repetitivelysubjected to loads greater than itsfatigue limit. Re-check the size ofthe peak load and formulate acountermeasure.9.4 Bush / Roller RelatedSymptom Possible Causes RemedyRoller and/or bushingsplits. (Falls off)Roller does not rotate.Excessive load or improper lubrication.Operating a chain at high load withoutproper lubrication can create frictionbetween the pin and bush, causingthe pin to rotate. In this condition, thepin may come out, leading to chainbreakage.Improper initial lubrication at installation.Excessive load or speed of rotation.Inadequate lubrication.RS11-SS-1, RS15-1, RS25-1, RS35-1Reduce shock loads by making the start-up, stopping, andother actions smoother.Remove the large repetitive load. Otherwise, increase thesize or number of chains.Install a casing to protect the chain. Periodically clean andlubricate the chains.Shock-induced bending fractureThe pin is subjected to a large shock load andbreaks. The side with the initiating point receivestensile load, and the fracture progresses fromthis point. A pin is especially susceptible tobecoming weak with regard to bending whenthe surface of the pin has corroded. This type ofphenomenon occurs quite easily.Replace with new chain. Improve the lubrication or loadingconditions.Replace with new chain immediately. Do not weld orreuse the pins. (Dispose of the old chain to be sure that itis not used again by mistake.) Also, if the pin head or linkplate surface is worn, check the installation.Replace the connecting link. If pin wear is excessive,replace the chain also. Take special care to properlyinstall the connecting section for devices such as endbrackets used for lifting applications, etc.Choose a different chain according to the kW ratings table.Replace the chain. Provide adequate lubrication accordingto the operating conditions.Fatigue fracture.Reached the point of fatigue during operation and eventually broke. Impact withthe sprocket teeth at a force exceeding the chain's transmission capacity.The inner link plate is moving inward, orthe bush is cracked.A bushed chain and not a roller chain is being used.Replace with a new chain. Re-inspect the installation andload conditions.Foreign particles have gotten betweenthe bush and roller.Periodically clean the chain. Install a casing to protect thechain.Roller is opening up.Excessive load.Reduce the load. Provide adequate lubrication.173Roller is becominghourglass shaped.Excessive load or inadequatelubrication.Replace with new chain. Improve the lubrication or loadingconditions.
Handling of roller chain and sprocketRoller Chain Inquiry SheetMachine usedOnly forreplacementOperation timeOutput and reduction gear ratio of reduction gearsDo you have fluid couplings? Yes NoDistance between shaftsFrequency of starting (stopping) or forward (reverse) operationNote: When frequency of item 12 is for ordinary transmission: 5 times/day (8 h) or moreWhen frequency of item 12 is for lifting, shuttle traction, or pin gear: 6 times/day (8h) or moreMoment of inertia or GD 2 converted to roller chain driven shaft inertiaStarting torqueAmbient temperature Normal temperature (-10C to 60C )AtmosphereIndicatecurrently useditems at rightDrive shaft diameterChain numberNumber of linksNote: If item 5 is not known, complete items 6, 7, and 8.Moment of inertia or GD 2 of motorTrouble or other special mentionAbrasive dust (Yes No), OtherSimple diagram of layout from prime mover to chain drive sectionkWmmkN m { kgf m }ChainCompany positionSprocket numberHours/day Days/monthMotor outputshaft torque (rated)Hours/day Days/monthType and rated output of motorRPM of drive shaft and driven shaft r/min Drive shaft( ) Driven shaft( )Do you have cushion start/stop? Yes NoLoad fluctuation Smooth Moderate shock Large shockStopping torqueC to}In this case, complete items 14 to 17.( ) mm Driven shaft diameter ( ) mmCAcidic, alkaline, or other corrosive Fluid GasNew installation ReplacementTimes/day (8 h)kg m 2 { kgf m 2 }kg m 2 { kgf m 2 }kN m { kgf m 2 }(YesNo)Note: For a conveyor drive or other application with a high shock frequency,indicate the size of the conveyed load, weight, speed, and conveyor length.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 HandlingCOMPANYNAMEDATETELFAX174
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Handling of roller chain and sprocketRoller Chain Inquiry SheetMachine usedOnly forreplacementOperation timeOutput and reduction gear ratio of reduction gearsDo you have fluid couplings? Yes NoDistance between shaftsFrequency of starting (stopping) or forward (reverse) operationNote: When frequency of item 12 is for ordinary transmission: 5 times/day (8 h) or moreWhen frequency of item 12 is for lifting, shuttle traction, or pin gear: 6 times/day (8h) or moreMoment of inertia or GD 2 converted to roller chain driven shaft inertiaStarting torqueAmbient temperature Normal temperature (-10C to 60C )AtmosphereIndicatecurrently useditems at rightDrive shaft diameterChain numberNumber of linksNote: If item 5 is not known, complete items 6, 7, and 8.Moment of inertia or GD 2 of motorTrouble or other special mentionAbrasive dust (Yes No), OtherSimple diagram of layout from prime mover to chain drive sectionkWmmkN m { kgf m }ChainCompany positionSprocket numberHours/day Days/monthMotor outputshaft torque (rated)Hours/day Days/monthType and rated output of motorRPM of drive shaft and driven shaft r/min Drive shaft( ) Driven shaft( )Do you have cushion start/stop? Yes NoLoad fluctuation Smooth Moderate shock Large shockStopping torqueC to}In this case, complete items 14 to 17.( ) mm Driven shaft diameter ( ) mmCAcidic, alkaline, or other corrosive Fluid GasNew installation ReplacementTimes/day (8 h)kg m 2 { kgf m 2 }kg m 2 { kgf m 2 }kN m { kgf m 2 }(YesNo)Note: For a conveyor drive or other application with a high shock frequency,indicate the size of the conveyed load, weight, speed, and conveyor length.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 HandlingCOMPANYNAMEDATETELFAX174