Required Performance of Chains and Technical Terminology

1. Tensile Strength

Definition:
The maximum load a chain can withstand when pulled until it breaks.

Purpose / Function:
Crucial for handling high torque during startup or acceleration. A chain must have sufficient strength to avoid breakage under such conditions.


2. Fatigue Strength

Definition:
The strength to resist fatigue failure caused by repeated loads, such as during high-speed driving or winding roads.

Purpose / Function:
Directly affects the chain’s durability. High fatigue strength ensures long-term use without cracking or failure due to stress repetition.


3. Wear Resistance / Elongation Resistance

Definition:
Chains tend to elongate over time due to metal-to-metal wear between pins and bushings, especially when lubrication is insufficient.

Purpose / Function:
When a chain elongates:

  • It misaligns with the sprocket

  • Causes skipping or slipping teeth

  • In the worst case, may break or fall off

A wear-resistant chain ensures better sprocket engagement, reduces maintenance needs, and improves cost-effectiveness.

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