1952 February, “New Locomotives for the Gold Coast[now Ghana]”, inRailway Magazine, page74:
Thirty mixed-traffic 4-8-2 locomotives recently completed by the Vulcan Foundry Limited for the 3 ft. 6 in. gauge Gold Coast Government Railway have all their axles, big ends, and coupling and eccentric rods fitted with British Timkenroller bearings.
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 onroller 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: Theroller-bearing A1s”, inTrains Illustrated, page643:
The fiveroller-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.
(especially) Such a bearing with cylindrical rollers rather than spherical ones (balls).
By an arbitrary but widely upheld idiomatic convention,precise usage in mechanical industries often holdsroller bearing andball bearing to becoordinate terms under the hypernym ofrolling-element bearing, in which case rollers that are spherical are excluded as referents of the wordroller and are instead calledballs.
