Garrett AiResearch foil bearings were installed on all U.S. military aircraft to replace existing oil-lubricated rolling-contact bearings.

In addition to replacing truss bearings and subway stringers, workers recently began sandblasting the structure to prepare surfaces for a fresh coat of paint.

The slowest period is October through December, when work drops back enough that the maintenance department can tear down all the machines for their annual overhauls, replacing worn bearings and loose belts.

Simply replacing worn bearings may fix this problem, but in older engines with a lot of wear not much can be done besides completely overhauling the engine.

But design work and engineering calculations have also been applied to the problem of replacing bearings with superconducting magnets.

More recently, in 1991, Whitechapel Bell Foundry overhauled the fittings and replaced the gudgeons and bearings.

A $100 tuneup includes disassembling the bike and replacing bearings and brake and gear cables.

It is easier to install because by reusing the carrier, there is no need to replace the shims and bearings, or to re-measure the preload on the ring and pinion.

The stability of the latest mercury-mirror telescopes has been greatly improved by replacing conventional mechanical bearings with compressed-air bearings, which prevent the turning dish from coming into contact with any solid object that might cause vibrations.

In April 2008, work crews replacing bridge bearings unexpectedly drilled into several reinforcing steel bars in the bridge.