DRIVE CHAINS - Tsubaki

Handling of roller chain and sprocket9.2 Link Plate RelatedSymptom Possible Causes RemedyExcessively large shock load.Reduce shock loads by making the start-up, stopping, andother actions smoother (installing a shock absorber, etc.).Increase the size or number of chains.Breakage of link plate.Vibration in the chain.Large inertia in the driven machine.(excessive load).Corrosion.Static fractureStreching the link plate witha tensile load beyond itsbreaking load will cause itto strech and then break.Crackes in the linkplates (fatigue), whichare perpendicular tothe direction of pull.Deformation of linkplate holes.Corrosion stresscracks appear, usuallyas bow-shaped cracksin the link plate.Loads are greater than allowable.Excessive load.Fatigue fractureBy repeatedly applying aload past its fatigue limit(fatigue strength), thefatigue will start at holesand then suddenly break.The chain is being used in an acidicor alkaline enviroment. (This is notcaused by a repetitive load).Install an anti-vibration device (for example, tensioner oridler), Refer to "Excessive vibration in chain" page.Increase the size of number of chains.Replace with a new chain. Install a casing to protect thechain. Otherwise, periodically clean the chain.Offset link plate fatigueOffset link plates are bent atthe center, and the resultingconcentration of stress at thebend can cause a fatiguebreak. Avoid using offset linksin high-stress applications.Remove all large or excessively repeating loads. Otherwise,increase the size or number of chains. Replace with a newchain.Remove the cause of the excessive load. Replace with anew chain.Replace with a new chain. Install a casing to protect the chain from the environment.Consider a chain with a high resistance to corrosion stress cracks. (Please consult Tsubaki.)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 Handling172