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).
The results of an end thrust test for different types of ball bearings.
| Identifier | ExFiles\Box 20\7\ Scan028 | |
| Date | 24th July 1914 | |
| COPY. RS{Sir Henry Royce's Secretary} RE/P 24. 7. 14. To Hy.{Tom Haldenby - Plant Engineer} from R.{Sir Henry Royce} Copy to J.{Mr Johnson W.M.} Copy to Wor.{Arthur Wormald - General Works Manager} Copy to By.{R.W. Bailey - Chief Engineer} Re End Thrust Test of Ball Bearings. I thank you for your report, and it seems there is not doubt of the result, and we are glad the experiments confirmed it. Deep Groove D.W.F. first. Very good. Ordinary Hoffmann second. Very fiar. Skefko Very poor. F.H.R. x 51/2 | ||