🔍 Key Concepts

• Antifriction bearings and how the rolling elements (balls or rollers) contact the raceway • The difference between surface wear (scratching, scoring) and localized impact damage (dents or brinelling) • What can happen to a stationary bearing when exposed to external forces or vibration

💭 Think About

• Which option would most likely create small, evenly spaced dents exactly where the rolling elements normally sit? • Do dirt, water, or abrasives usually cause smooth dents, or do they more often cause scratching, pitting, or corrosion? • What could happen to the contact points between balls/rollers and the race if the bearing is not turning but is being shaken or vibrated?

✅ Before You Answer

• Distinguish between wear (gradual material removal) and impact damage (localized deformation) • Visualize where the rolling elements rest when the bearing is idle and how forces might be transmitted through them • Ask: Which choice best matches the idea of repeated impacts at fixed contact points rather than general roughening or corrosion of the surface?