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BEARINGS

BEARINGS. By: Laurence Kwok. Common Types. 2 Types: Linear Rotary. 6 Principles of Operation. Plain Bearings Rolling-Element Bearings Jewel Bearings Fluid Bearings Magnetic Bearings Flexure Bearings. Plain Bearings. Carries loads by sliding Usually made of 2 parts Commonly used.

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BEARINGS

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  1. BEARINGS By: Laurence Kwok

  2. Common Types • 2 Types: • Linear • Rotary

  3. 6 Principles of Operation • Plain Bearings • Rolling-Element Bearings • Jewel Bearings • Fluid Bearings • Magnetic Bearings • Flexure Bearings

  4. Plain Bearings • Carries loads by sliding • Usually made of 2 parts • Commonly used

  5. Rolling-Element Bearings • Round pieces placed between 2 objects • Various types • Pretty well rounded in terms of bearings Image from http://www.tribology-abc.com/calculators/e12_3.htm

  6. Jewel Bearings • Rolls shaft into bearing, rather than sliding • Used mechanical watches • Used in sensitive measuring tools

  7. Fluid Bearings • Supports load on thin later of gas or liquid • Cheaper than other bearing types • Lasts very long

  8. Magnetic Bearings • Supports loads using magnetic levitation • Supports objects in vacuum environment • Used in some trains for magnetic levitation • High cost, low accuracy, large size

  9. Flexure Bearings • Made of 1 part, connecting 2 others • Simple • No specialized equipment required • Relies on repeated flexing

  10. Sources: • http://www.bearings.machinedesign.com/ • http://en.wikipedia.org/wiki/Bearing_%28mechanical%29 • http://science.howstuffworks.com/bearing.htm • http://www.efunda.com/DesignStandards/bearings/bearings_introduction.cfm

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