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Engineering Components

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Rotary Shaft Seals

What is a Rotary Shaft Seal?

Also known as an oil seal, shaft seal, lip seal or any variation of these. It is a simple device for excluding dust, water or any other contaminant whilst retaining lubricant in rotary shaft equpment. Generally it has been developed as a means of protecting the bearings of roatating shafts. 

How does it work?

The basic princple of sealing is straight forward - the flexible lip is held against the roatating part (usually the shaft) whilst the casing (or O.D.) is pressed into the housing or bore and holds the seal in place. The sealing lip needs some form of lubrication to avoid overheating and is usually energized by means of a garter spring.

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