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).
Replacement bearing with increased capacity for the Bentley Pinion Thrust.
| Identifier | ExFiles\Box 114\2\ scan0001 | |
| Date | 22th December 1933 | |
| GRY{Shadwell Grylls} see me x3807 HS{Lord Ernest Hives - Chair} To DY.{F R Danby} (struck out) from Da.{Bernard Day - Chassis Design} c. For E.H. (struck out) Hs.{Lord Ernest Hives - Chair} Da.{Bernard Day - Chassis Design}2/HP.22.12.33. Bentley Pinion Thrust. Herewith is N.Sch.3918, showing a bearing of increased capacity to take the place of the one which failed. There are 11 .5 balls instead of 12 .437, and the capacity is believed to have been increased by from 15% to 20%. We should welcome Hoffmann's comments as to this, and also as to the design of the bearing in general. It will be noticed that owing to the restriction of the length of thread now on the pinion, we have had to thin the nut. The thread still seems to be adequate for the over-run thrust, but for future the thread or pinion could be increased as shewn. Da.{Bernard Day - Chassis Design} | ||