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).
Standardisation sheet memo regarding Bentley big end bearings and their clearances.
| Identifier | ExFiles\Box 115\1\ scan0187 | |
| Date | 16th December 1936 | |
| 1020 To By.{R.W. Bailey - Chief Engineer} from Rm{William Robotham - Chief Engineer}/Swdl.{Len H. Swindell} Rm{William Robotham - Chief Engineer}/Swdl.{Len H. Swindell}2/AP.16.12.36. BENTLEY BEARINGS. A standardisation sheet is being issued with regard to the use of RR.56. big end bearings. It should be noted that the bearings as run during our development work have been in the fully heat treated condition. These bearings have been produced for us by H1. Will you please see that the details of the crankpins and the bearing bushes are such that the minimum diametrical clearance is .002 and the maximum .0025". Rm{William Robotham - Chief Engineer}/Swdl.{Len H. Swindell} | ||