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).
Modifications and manufacturing options for the Phantom III front axle top pivot bearing.
| Identifier | ExFiles\Box 92\5\ scan0188 | |
| Date | 26th February 1936 | |
| BY.{R.W. Bailey - Chief Engineer} C.F.E/B.V. Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer} Rm{William Robotham - Chief Engineer} +301 Da.{Bernard Day - Chassis Design}4/GP.26.2.36. Phantom III Front Axle Top Pivot Bearing. Confirming our discussion, referring to N.Sch.4768, we wish to make the metal of the yoke piece above the felt washer .075" thick, machining out existing forgings, instead of the .062 called for on the drawing. The felt is to be reduced to .100 thick compressed, and to be .130 thick uncompressed. As soon as possible the forging of the yoke piece is to have the additional metal added, which is shown on the drawing. As regards the ball bearing itself, it is desired to take up with Ransome and Marles the question of their making this bearing complete. The objection they have to doing so now is, it is understood, the triangular shaped flange on the upper cover, which is a shape they cannot easily produce. By suggests that we might supply this cone to Ransome and Marles, with a round flange, and subsequently mill off the redundant metal ourselves, and this proposal is to be gone into. If it is decided to make these bearings ourselves after all, By suggests that they should be made in either S/ZNX which has a cone strength of 65 tons, or in S/ZNCR, which has a core strength of 85 tons. He considers then that a case .035 plus and minus 5 would be amply thick enough. E.{Mr Elliott - Chief Engineer} | ||