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In thrust bearing, there is higher contact, so wear occurs very soon.

But in case of journal, especially, hydrodynamic, the contact between shaft and bearing is eliminated as it is suspended within the bearing chamber. this makes wear to be very less and thus has the following,

Increased life time.

Higher efficiency.

Smooth working.

No performance degradation.(Performance shading)

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A thrust bearing Carries a load predominately as a axial load through its bearing assembly and a Journal bearing consists of Journal or plain bearings on a shaft or journal which rotates freely in a supporting metal sleeve or shell. There are no rolling elements in style these bearings.

Hence less friction and wear.

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1.A thrust bearing is a particular type of rotary rolling-element bearing. Like other bearings they permit rotation between parts, but they are designed to support a predominately axial load.

150px-Thrust-ball-bearing_din711_ex.png

2. A plain bearing (in railroading sometimes called a solid bearing) is the simplest type of bearing, comprising just a bearing surfaceand no rolling elements. Therefore the journal (i.e., the part of the shaft in contact with the bearing) slides over the bearing surface.

250px-NYC_100-driving-axle-friction-bear

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