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).
Choice between Schatz and New Departure bearings, with suggestions for fitting.
| Identifier | WestWitteringFiles\R\January1928-March1928\ 58 | |
| Date | 14th February 1928 | |
| DA.{Bernard Day - Chassis Design} FROM R.{Sir Henry Royce} (At Le CanadelHenry Royce's French residence.) C. to HS.{Lord Ernest Hives - Chair} ORIGINAL R1/M14.2.28. REC'D.{John DeLooze - Company Secretary} & DESPATCHED FROM WW. 18.2.28. E.A.C.10. X3807/X547 Re. N. sch. 2537., from the experience mentioned it certainly suggests that Schatz bearing is treacherous, but I understood that there was no difference in the angle. It was New Departure exactly in principle with one row of balls, but if so, the balls would have to fit the inner race, or very nearly so. Anyway, for safety and quick progress let us settle on New Departure type. I am not favourable to N. scheme 2537. even for a temporary arrangement: too many diametral fits etc. I suppose it is difficult to find a standard bearing suitable for the space. (1) I suggest that the coupling might lock the ball race nut, (2) that we often use this type of ball bearing with the sheet metal housing, (3) that we should like more steel in the races, (4) that I should like to see the inner race fit directly on to the pinion shaft, (5) that I do not understand the pinion being pushed into the wheel 1/10th of an inch more than the level teeth, and (6) that I fear the bearing would not be oil retaining. We cannot rely on the felt: I have never thought it of permanent use. (1) | ||