roller bearing

English

Noun

roller bearing (plural roller bearings)

  1. A bearing in which the load is carried by round (e.g. cylindrical or spherical) elements.
    • 1959, edited by David P. Morgan, Steam's Finest Hour, Kalmbach Publishing Co.:
      In 1930 the proposal of placing all axles of a steam locomotive on roller bearings was viewed so suspiciously that the Timken Roller Bearing Company couldn't even obtain permission to equip an existing engine at its own expense. (It ended up buying a demonstrator loco and equipping that with roller bearings instead.)
    • 1961 November, “Talking of Trains: The roller-bearing A1s”, in Trains Illustrated, page 643:
      The five roller-bearing A1s are now averaging 120,000 miles between shopping; this figure is an improvement of about 50 per cent on the norm of other ex-L.N.E. Pacific types.

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