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Ceramic Bearings

Ceramic Bearings. Ben Stratton Jake Allen. Overview. Materials used in bearings What are ceramics? Why ceramic bearings over steel? Applications References Summary. Steel Bronze Plutonium Nylon. Aluminum Wood Teflon Ceramic. Materials Used. What are Ceramics?.

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Ceramic Bearings

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  1. Ceramic Bearings Ben Stratton Jake Allen

  2. Overview • Materials used in bearings • What are ceramics? • Why ceramic bearings over steel? • Applications • References • Summary

  3. Steel Bronze Plutonium Nylon Aluminum Wood Teflon Ceramic Materials Used

  4. What are Ceramics? • Definition: any inorganic nonmetallic solids processed at high temperatures. • Properties: hard, stiff, high heat and corrosion resistance, low density • Advanced: Silicon Nitride (Si3N4)

  5. Ceramic Bearings • What is a hybrid bearing? • Ceramic balls • Steel rings

  6. Ceramic vs. Steel Friction/Vibration • Ceramic • High surface finish • Smaller contact ellipse with race Lubrication • Ceramic requires less lubrication

  7. Ceramic vs. Steel

  8. Ceramic vs. Steel Wear

  9. Ceramic vs. Steel Temperature Rise

  10. Ceramic vs. Steel Properties

  11. Ceramic vs. Steel Speed • Ceramics can run at higher rpm Cost • Ceramics cost 5% more than steel

  12. Applications • Medical • Machine tools • Turbines • RC vehicles • High speed electric motors • Pumps • Aerospace

  13. References • www.bocabearings.com • www.evolution.skf.com • www.bearings.com • www.bardenbearings.com • www.ceramicbearings.com

  14. Summary • Lower friction • Less wear • Smaller temperature rise • Higher speeds • Slightly higher cost

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