The performance and failure analysis of different ball bearings after a series of tests.
| Identifier | ExFiles\Box 20\7\ Scan027 | |
| Date | 24th July 1914 guessed | |
| Wor {Arthur Wormald - General Works Manager} /Hy {Tom Haldenby - Plant Engineer} 12/L20714. Sheet 2. ran very hot and noisy and finally cracked up altogether. Both races were badly torn up and chipped and the balls were also badly chipped. In all the six tests which have been made the D.W.F. deep groove has come out the best, both the bearings being fit to continue in use at the end of the tests. The D.W.F. deep groove size 35 X 80 X 21 m {Mr Moon / Mr Moore} /m has 8 balls .5" dia held by a pressed steel cage. The Hoffmann has 10 balls .5 dia held by a heavy brass cage. The Skefko has a double row of balls .406" dia and 14 balls to each row. [Watermark: DICKINSON BOWD] | ||
From the Rolls-Royce experimental archive: a quarter of a million communications from Rolls-Royce, 1906 to 1960's. Documents from the Sir Henry Royce Memorial Foundation (SHRMF).