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).
The potential causes of failure in planet wheel ball bearings.
| Identifier | WestWitteringFiles\D\March1920\ Scan61 | |
| Date | 22th March 1920 | |
| Contd. -2- planet wheel ball bearing lubrication. They have not yet been examined by any of our men to confirm this point. The experience goes to prove that it is a fault which takes place on the first run of a gear. Once the gear has run a few hours the risk is very little. It is difficult to give a reason why these bearings should suddenly commence to give a lot of trouble - it may be due to the ball bearings although examination does not show any fault in them. It is most probably due to a variation in fitting, thus not allowing the usual amount of oil to leak into the gear until it has run for some time. I do not consider that the recent failures of the planet wheel ball bearings could have been anticipated on experimental tests. Hs.{Lord Ernest Hives - Chair} EX. MAR 22 1920 RECEIVED | ||