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).
Instructions for supplying and fitting special big end bearings, main bearings, and a large capacity oil pump, including clearance specifications.
| Identifier | ExFiles\Box 88\1\ scan0301 | |
| Date | 8th December 1936 | |
| RHC.{R. H. Coverley - Production Engineer} from Rm{William Robotham - Chief Engineer}/Swdl.{Len H. Swindell} X 261 Rm{William Robotham - Chief Engineer}/Swdl.{Len H. Swindell}1/R.8.12.36. B.26.JD.{J. Draper - Frames} M.{Mr Moon / Mr Moore} Pierre-Louis Dreyfus. Further to memo Rm{William Robotham - Chief Engineer}4/R.4.12.36., in which we state we are supplying special big end bearings and shims in RR.56, together with a rear main bearing and shims in RR.56 for the above car, will you please work to the following:- (1) We are supplying to you to-day the RR.56 rear main bearing and shims. The diametrical clearance in this bearing should be .003 - .00325, the crank end float to be .0035 - .004. (2) The remaining standard main bearings which are already in the unit to have the intermediate mains grooved to the attached drawing Rm.{William Robotham - Chief Engineer}244. (3) The RR.56 big end bearings which we can supply on Thursday (10/12/36) should be fitted to have diametrical clearance on the crankpin of .002 - .00225. Check shims for correct sectional thickness. (4) A large capacity oil pump will be supplied in conjunction with the above job. Rm{William Robotham - Chief Engineer}/L.H. Swindall. | ||