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).
Test report on a Bentley rear axle pinion, run deliberately misaligned to test for failure.
| Identifier | ExFiles\Box 84\4\ scan0372 | |
| Date | 13th January 1938 | |
| 202 To Rm{William Robotham - Chief Engineer}/Gry.{Shadwell Grylls} from Rm{William Robotham - Chief Engineer}/W.Bell. Rm{William Robotham - Chief Engineer}/W.Bell.1/CB.13.1.38. BENTLEY REAR AXLE PINION TEST. The rear bearing spigot of a Bentley rear Axle Pinion was tested for failure by running with the pinion bearing bridge piece set .010" out of line relative to the thrust bearing in the axle casing. The pinion was driven through the crown wheel for 125 hours at 4,500 R.P.M. (not transmitting any power) and was then stripped for inspection and crack testing. - The spigot proved to be perfectly sound. Also the bridge piece retained its .010" out of alignment. Before commencing the run, the gears were too tight to turn by hand, but after the test they could be easily rotated. No measureable increase in float in the thrust bearing was recorded, whilst the wear in the tail roller bearing was very slight. The balls of the thrust race however, had been running slightly out of track. Rm{William Robotham - Chief Engineer}/W. Bell. W.Bell [Signature] [Handwritten Note] GRY{Shadwell Grylls} This to confirm previous verbal report given when tests were completed WB{Mr Brazier/Mr Bell} | ||