Firstly, the chain pitch is too large or the number of teeth of sprocket is too small. If the pitch is too large, the roller and the gear are not well matched, and the roller will break easily; if the number of teeth is too small, the roller cannot be stuck completely, and the roller will be cracked easily. Maintenance measures: According to the actual situation, choose a chain with small pitch or increase the number of teeth of the sprocket.
Secondly, there is debris in the teeth groove of the sprocket wheel, and the roller is squeezed by the debris resulting in rupture. Maintenance measures: Remove the debris in the teeth groove or replace the chain with a new one.
Third, the chain creeps too high on the sprocket teeth. Due to the chain mismatch, or too loose, the climbing position is too high. Repair measures: Replace the chain with a new one, or properly tension the chain according to the situation.
Fourthly, the impact on the chain is too large and exceeds its maximum load. Repair measures: Reduce the load and reduce the impact on the chain.