In automotive maintenance and mechanical fabrication, selecting the correct washer is critical for maintaining joint integrity, managing stress, and preventing fastener failure. Match each washer type on the left with its primary mechanical function on the right.
- Flat Washer (Plain SAE/USS)Distributes clamping force over a broader surface area to prevent galling or crushing of softer joint materials.
- Split-Ring Lock WasherProvides spring tension as its offset helical ends compress and bite slightly into bearing surfaces to deter loosening from mild vibration.
- Belleville (Conical Disc) WasherMaintains continuous clamping preload to absorb shock and compensate for thermal expansion in high-temperature or heavy-load joints.
- Tooth (Star) Lock WasherEmploys serrated teeth that cut into mating metal surfaces to resist vibration and provide positive electrical grounding.
Answer
Flat Washer matches with distributing clamping force over a broader surface area; Split-Ring Lock Washer matches with providing spring tension via helical offset ends to deter loosening; Belleville Washer matches with maintaining continuous clamping preload under thermal expansion; Tooth Lock Washer matches with employing serrated teeth that cut into surfaces for vibration resistance and electrical grounding.
Each washer is designed for a distinct mechanical purpose: Flat washers spread clamping pressure over a wider footprint to protect workpieces. Split-ring lock washers supply basic spring tension and minor frictional bite against moderate vibration. Belleville washers function as high-rate conical springs to maintain preload during thermal cycling and severe shock. Tooth (star) lock washers utilize multiple sharp serrations to grip metal surfaces firmly and penetrate protective coatings for chassis grounding.
Step-by-Step Solution
Key Concept
Engineering roles, load distribution mechanics, and locking principles of standard, helical, conical, and serrated washers.
Estimated Time:1m 0s