Pre-tension(standard chain is very important)
ZMIE chain Pre-stretching takes an important role during the chain manufacturing. After Pre-stretching, the chain not only improves the chain length accuracy and reduces the elongation of the running of chain, but also eliminates the mismatch between the chain plate, pin and bush. Uniformity. The pre-tensioning force is generally 30% of the breaking load, and the Pre-stretching time is 10S~20S. International standard ISO606:2004 request that chains such as roller chains, bush chains, plate chains, motorcycle chains, tooth chains and agricultural chains must be pre-tensioned after finished.