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).
Bearing arrangements and casing modifications for the Senior Range rear axle differential.
| Identifier | ExFiles\Box 114\1\ scan0281 | |
| Date | 23th February 1940 | |
| 1015 SECRET To Rm.{William Robotham - Chief Engineer} from Ev.{Ivan Evernden - coachwork} c. to Ev{Ivan Evernden - coachwork}/HH. Axle general Ev.{Ivan Evernden - coachwork}14/JH.23.2.40. Rear Axle - Senior Range. R.H. Differential Bearing - For use with Timken L.H. Bearing. We attach herewith two prints of PL.123 which shews schemes for the use of a parallel roller bearing on the R.H. side of the rear axle differential. There is a temporary scheme for use on axles where the casing has been machined already, and also a final scheme. It has been agreed by Rm{William Robotham - Chief Engineer}/FJH.{Fred J. Hardy - Chief Dev. Engineer} that a special bearing can be called for in the former.case. The only axle case in existance on which this experiment has to be tried is that for overhanging pinnion to SCD.1326 - casing detail EXS.16141. As all future new axles must have the latest strengthened casing to GCD.1483 the casing detail should be modified for the final scheme on PL.123 and also the Differential Housing. The L.H. Timken bearing arrangement to be used in conjunction with this set-up is shewn on PD.312 and GL.{G. Linnett}887. Up to date this has been a Timken Bearing having an O.D. of 3.265" (83 m/m) Since we are to use on the R.H. side an 85 m/m O.D. roller bearing we could commonise the bores by using Timken Series 355 and bearing cone No.358 and cup No.354A. This also gives a common grinding diameter of 1.771 or 45 m/m for the bearings on the two halves of the differential cage. We are asking Ev{Ivan Evernden - coachwork}/HH to make this small modification in the case of the new semi floating .650 Hypoid axles about to be instructed for the Senior Range. | ||