Thrust block
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A thrust block, also known as a thrust box, is a specialised form of thrust bearing used in ships, to resist the thrust of the propeller shaft and transmit it to the hull.
Multi-collar thrust box, with shaft
Michell thrust blocks at the London Science Museum
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.
Miba fluid film thrust bearing