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).
Unsatisfactory method of attaching cones to gears and proposing an alternative using parallel pins or bolts.
| Identifier | ExFiles\Box 136\4\ scan0218 | |
| Date | 27th April 1938 | |
| γ 1153. To RHC.{R. H. Coverley - Production Engineer} from Rm{William Robotham - Chief Engineer}/FJH.{Fred J. Hardy - Chief Dev. Engineer} c. By.{R.W. Bailey - Chief Engineer} Rm{William Robotham - Chief Engineer}/FJH.{Fred J. Hardy - Chief Dev. Engineer}7/MH.{M. Huckerby}27.4.38. GEAR BOXES - ALL CARS. Re your memo RHC.{R. H. Coverley - Production Engineer}1/MC.20.4.38. A scheme was tried some time ago on Ph.II in which the cones were attached to the gears by set screws so that the torque on the cones was taken by friction due to the clamping load of the screws. This proved to be unsatisfactory as the cones worked loose. In view of this we think that parallel pins or bolts would be satisfactory only if they were all a tight fit both in the cones and the gears. This would still necessitate hand reaming and we do not believe that production can guarantee to maintain the tight fit even with hand reaming. Rm{William Robotham - Chief Engineer}/FJH.{Fred J. Hardy - Chief Dev. Engineer} | ||