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).
Analysis of a camshaft bearing flange failure and its potential causes, including thermal expansion.
| Identifier | ExFiles\Box 36\2\ scan 109 | |
| Date | 20th April 1927 guessed | |
| contd :- -2- exerted a pressure opposing the springs. In the case of the low pressure valve the spring pressure was almost completely discounted. The rivet centres are therefore an important dimension, before and after these flat springs are made up. Camshaft Bearing (E.27902) We have had a case of a bearing flange breaking up. It is thought that this was due to a tightly fitted bearing and a consequent lack of sufficient oil at this point. We have examined the possibility of failure being due to expansion along the camshaft axis. The difference between steel and aluminium amounts to 0.002" on the length considered - 2". We understand that 0.004" to 0.005" allowance is usually given at this point and if this clearance is adhered to we should not expect trouble due to expansion. Hs{Lord Ernest Hives - Chair}/V.Halliwell. | ||