Which term is defined as stretching/wear of chain?

• A. Lubrication
• B. Pillow Block Bearing
• C. Belt Tension
• D. Chain Elongation

Answer: (D)

When a chain stretches under use, the metal parts wear and the overall length increases; this is called chain elongation. It’s the measure of how much the chain has grown compared to its original length, which affects how well the chain meshes with the sprockets and can lead to more wear, noise, and potential failure if not addressed.

Lubrication helps reduce friction and wear but doesn’t describe the change in length itself. A pillow block bearing is just a type of bearing housing that supports rotating shafts. Belt tension relates to belts, not chains. So the term that specifically describes stretching or wear of a chain is chain elongation.