206430315-ceramic-ball-bearing-seminar-ppt.ppt

8/10/2019 206430315-CERAMIC-BALL-BEARING-Seminar-Ppt.ppt

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Technical Seminar on

Ceramic Ball Bearings

BY

Tamam Mahdi Saleh

To

Dr. Nehal


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CONTENTS Introduction

What is a Ceramic Hybrid Ball Bearing?

Types of Ceramic Ball Bearings

Features

Technical Charts

Advantages

Applications Conclusion

References


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Introduction

Silicon Nitride was developed in 1963 by NASA.

The machine tool industry has been a pioneer in the

use of ceramic hybrid ball bearings

Hi-performance motor racing programs, like Formula-

1, are using ceramic hybrids.

Silicon Nitride ceramic balls are virtually

indestructible, survive in thermal, heavy load, won'tdent or rust, virtually unbreakable and will not wear or

degrade over time.


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What is a Ceramic HybridBall Bearing?

We can achieve new

Friction-reducingCeramic ball bearings!


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A Ceramic Hybrid Ball Bearing made of ceramic elements

from silicon nitride.

Silicon nitride is a highly processed silica and ceramic

material.

The use of Ceramics for bearing components results in a far

superior product.


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Types of Ceramic Ball Bearings Ceramic Hybrid Ball Bearings

Full Ceramic Ball Bearings


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Ceramic Hybrid Ball Bearings
http://www.vxb.com/page/bearings/PROD/HybridCeramicBearings/Kit7577


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Full Ceramic Ball Bearings
http://www.vxb.com/page/bearings/CTGY/FullCeramicBearings


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Features Non-conductive.

50% higher modulus of elasticity.

Low Density

Less maintenance.

Coefficient of Friction.

Corrosion Resistance

High Hardness


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Micro Weld Micro Weld occurs when microscopic surface "peaks"

on the ball and race make contact and actually weld

together. This occurs even with light loading and adequate

lubrication.

Thisresults in higher temperatures, higher friction,

and decreased life.

The ceramic hybrid bearing cannot micro-weld to

steel, thus eliminating the problem entirely.


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TechnicalCharts

Temperature


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The service life of ceramic hybrid bearings

Service life


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Vibration


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Running speed

The running speed ceramic ball bearing.


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Advantages Lower Maintenance Cost

Extended Service Life

Prevents Electrical Arcing

Extended Grease Life

Reduced Wear From Vibration

Lower Operating Temperature

Reduced Wear From Contamination


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Applications Motor Racing.

Motorcycle Racing.

Machine tool applications.

Aircraft accessories/aerospace.

Industrial Machinery.

Medical equipment.


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Some of the Ceramic Ball

Bearings
http://www.vxb.com/page/bearings/PROD/FullCeramicBearings/Kit7651http://www.vxb.com/page/bearings/PROD/FullCeramicBearings/Kit7650http://www.vxb.com/page/bearings/PROD/FullCeramicBearings/Kit7648http://www.vxb.com/page/bearings/PROD/FullCeramicBearings/Kit7628http://www.vxb.com/page/bearings/PROD/CeramicBallBearings/Kit7617http://www.vxb.com/page/bearings/PROD/CeramicBallBearings/Kit7612http://www.vxb.com/page/bearings/PROD/CeramicBallBearings/Kit7611http://www.vxb.com/page/bearings/PROD/CeramicBallBearings/Kit7610http://www.vxb.com/page/bearings/PROD/CeramicBallBearings/Kit7608http://www.vxb.com/page/bearings/PROD/CeramicBallBearings/Kit7601http://www.vxb.com/page/bearings/PROD/CeramicBallBearings/Kit7586http://www.vxb.com/page/bearings/PROD/CeramicBallBearings/Kit7576http://www.vxb.com/page/bearings/CTGY/FullCeramicBearings


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Conclusion Ceramic ball is tremendously harder than steel

(Rockwell 78c versus Rockwell 60c for steel balls).

Ceramic ball is 60% lighter than a steel ball.

Ceramic ball is much less prone to "skid".

Ceramic ball is significantly rounder and has a finer

finish than conventional steel balls.

Operating temperature for ceramic is 2000 degrees F.

versus 600 F. degrees for steel.


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Vibration levels of ceramic hybrid bearings average

two to seven times lower than that of steel.

Service life is two to five times longer than

conventional steel ball bearings. 25% of all electrical energy produced is used to

power some type of electric motor. Imagine the

savings in resources if all motors were to run with

ceramic hybrid ball bearings!


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References Elements of machine design by Khurmi.

www.bearingworks.com
http://www.bearingworks.com/http://www.bearingworks.com/http://www.bearingworks.com/http://www.bearingworks.com/http://www.bearingworks.com/http://www.bearingworks.com/


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206430315-ceramic-ball-bearing-seminar-ppt.ppt

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