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 material properties including embeddability, wear, and corrosion resistance.
| Identifier | ExFiles\Box 115\5\ scan0213 | |
| Date | 6th December 1938 guessed | |
| 2. combination of anti-score quality and mechanical strength. During wear or displacement, there must be neither ex-cessive heat generated nor seizure to the shaft. Whilst every effort should be made to ensure proper fil-tering of oil and to avoid any abrasive material entering the bearing, there are, however times when the best efforts in this direction fail and in such cases when extraneous dirt enters a bearing "embeddability" is of great importance. Deep scratches which usually encircle the entire circum-ference of the bearing material are observed readily. The more easily the dirt (including steel chips and cast iron dust or swarf) can be imbedded into the bearing, the less will be the grooving of the steel crankpin. Trouble from dirt is found in new engines through lack of thorough cleansing of the parts before assembly. An outside cir-culating oil system used during run-in at the factory is very beneficial, incorporating either stream-line filter/and/ or centrifuging etc. Corrosion resistance of bearing materials is the most recent of the properties to be given consideration. The problem obviously occurs only when there is a material subject to attack, and a corrosive lubricant. It is only within the past few years that corrodible materials have been used in | ||