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Roller and ball bearings
are commonly used in various components. The rollers
or balls are placed in between two raceways. This allows
relative motion by rotation of these pieces.
Some common types of bearings used include:
- Radial contact
- Angular contact
- Thrust
- Cylindrical
- Needle
- Tapered
- Spherical
Today’s improved materials provide greater reliability
of bearings in use. High temperature materials are available
for bearing fabrication, but the practical limit is
really determined by the breakdown temperature of the
lubricant. Synthetic lubricants are commonly used in
high temperature applications.
Bearing load ratings are established on the results
of laboratory rolling contact fatigue tests. Real world
conditions such as misalignment, vibration, shock loading,
insufficient or inefficient lubrication, extremes of
temperature, or contamination, will decrease the life
expectancy of the bearings. If these conditions are
severe, they may lead to premature failure of the bearings.
Some common characteristics of bearing failures are
listed below:
Wear
Fretting
Corrosion
Indentations
Electrical pitting
Smearing
Cracking
Flaking
Some of the factors that may lead to bearing failure
are improper lubrication, impact loading, vibration,
excess temperature, contamination, excessive loading,
and misalignment. AMC can provide failure analysis services
to determine the cause of your bearing failure.
To contact AMC please link here http://www.materialsengineer.com/DA-Bearing-Failure.htm
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