Spiral groove bearing
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Spiral groove bearings are self-acting, or hydrodynamic bearings used to reduce friction and wear without the use of pressurized lubricants. They have this ability due to special patterns of grooves.
Spiral groove journal and thrust bearings using air as a lubricant.
Hemi-spherical grease lubricated spiral groove bearing used in low noise fans.
Thrust bearing
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A thrust bearing is a particular type of rotary bearing. Like other bearings they permanently rotate between parts, but they are designed to support a predominantly axial load.
Spiral groove bearing
…With constant restriction to transverse flow. A spherical (or more usually a hemispherical) thrust bearing consists of a sphere that rotates concentrically in a spherical cup with groove patterns. The image shows the grease lubricated spiral groove hemispherical…
Miba fluid film thrust bearing