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).
Machining difficulties with experimental pieces due to increased spotfacing diameter.
| Identifier | ExFiles\Box 95\1\ scan0383 | |
| Date | 1st March 1937 guessed | |
| - 2 - difficulty which has arisen on experimental pieces. The increased diameter of the spotfacing necessitated by the larger inner races of the roller follower causes the cutter to run on the edges of the rockershaft jaws. These edges are hard as they are not machined after carburising. Em/FJH.{Fred J. Hardy - Chief Dev. Engineer} | ||