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accept a bushing. Integral bearings were very common in 19th-century machinery

but became progressively less common as interchangeable

manufacture permeated the industry.

An example of a common integral plain bearing is the hinge, which is both a

thrust bearing and a journal bearing.Plain bearings must be made from a material that is durable, low friction, low

wear to the bearing and shaft, resistant to elevated temperatures, and corrosion

resistant. Often the bearing is made up of at least two constituents, where one is

soft and the other is hard. The hard constituent supports the load while the soft

constituent supports the hard constituent. In general, the harder the surfaces in

contact the lower the coefficient of friction and the greater the pressure requiredfor the two to seize.

Bibliography :

1. Bearings and bearing metals, The Industrial Press, 1921.2. Neale, Michael John (1995), The tribology handbook3. http://en.wikipedia.org/wiki/Plain_bearing

Vocabulary :

Bearing = .A device that supports, guides, and reduces the friction of motionbetween fixed and moving machine parts.Journal Bearing = a rotating support placed between moving parts to allow them

to move easilyBushing = A fixed or removable cylindrical metal lining used to constrain, guide,or reduce friction.

Bibliography : www.google.rohttp://en.wikipedia.org/wiki/Plain_bearing

http://en.wikipedia.org/wiki/Interchangeable_partshttp://en.wikipedia.org/wiki/Interchangeable_partshttp://en.wikipedia.org/wiki/Hingehttp://en.wikipedia.org/wiki/Frictionhttp://en.wikipedia.org/wiki/Corrosion_resistancehttp://en.wikipedia.org/wiki/Corrosion_resistancehttp://en.wikipedia.org/wiki/Seizehttp://books.google.com/books?id=nopKAAAAMAAJhttp://books.google.com/books?id=Oorx_M-RC0AChttp://en.wikipedia.org/wiki/Plain_bearinghttp://www.google.ro/http://en.wikipedia.org/wiki/Plain_bearinghttp://en.wikipedia.org/wiki/Interchangeable_partshttp://en.wikipedia.org/wiki/Interchangeable_partshttp://en.wikipedia.org/wiki/Hingehttp://en.wikipedia.org/wiki/Frictionhttp://en.wikipedia.org/wiki/Corrosion_resistancehttp://en.wikipedia.org/wiki/Corrosion_resistancehttp://en.wikipedia.org/wiki/Seizehttp://books.google.com/books?id=nopKAAAAMAAJhttp://books.google.com/books?id=Oorx_M-RC0AChttp://en.wikipedia.org/wiki/Plain_bearinghttp://www.google.ro/http://en.wikipedia.org/wiki/Plain_bearing

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The image :

The resume :

A plain bearing, also known as a plane bearing or a friction bearing is thesimplest type ofbearing, comprising just a bearing surface and no rollingelements.

The types oflubrication system can be categorized into three groups:[1]

Class I bearings that require the application of a lubricant from an

external source (e.g. oil, grease, etc.).

Class II Bearings that contain a lubricant within the walls of the bearing

(e.g. bronze, Graphite, etc.,). Typically these bearings require an outside

lubricant to achieve maximum performance.

Class III bearings made of materials that are the lubricant. These

bearings are typically considered "self-lubricating" and can run without an

external lubricant.

http://en.wikipedia.org/wiki/Bearing_(mechanical)http://en.wikipedia.org/wiki/Bearing_surfacehttp://en.wikipedia.org/wiki/Lubricationhttp://en.wikipedia.org/wiki/Plain_bearing#cite_note-bsa-0http://en.wikipedia.org/wiki/Bearing_(mechanical)http://en.wikipedia.org/wiki/Bearing_surfacehttp://en.wikipedia.org/wiki/Lubricationhttp://en.wikipedia.org/wiki/Plain_bearing#cite_note-bsa-0

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