The quality of the chain can be distinguished by looking at the appearance, which is a very intuitive method
1. Whether the inner/outer chain is deformed, cracked, or embroidered
2. Whether the pin is deformed or rotated, embroidered
3. Whether the roller is cracked or damaged. Excessive wear
4. Whether the joint is loose and deformed
5. Whether there is abnormal noise or abnormal vibration during operation, and whether the chain lubrication is in good condition