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).
Rejected cam, dispatch schedules for 25/30 Cams, and dimensional errors on PH.111 Cams after hardening.
| Identifier | ExFiles\Box 153\2\ scan0341 | |
| Date | 25th June 1937 | |
| -2- RHC{R. H. Coverley - Production Engineer}/EG.1/DB.{Donald Bastow - Suspensions} 25.6.37. I had a rejected cam re-ground on bearing diameters and am hope ful it will be useable after the thrust face is corrected of roller bearings. This cam will be despatched to uson Friday. Seven 25/30 Cams will be despatched tomorrow and 10 to 15 on Monday and a further 25 in a weeks time. The Works are closing on Monday, Tuesday, and Wednesday next for stock taking, and I stressed the importance of keeping these promises and sparing no effort to improve upon them. I have demonstrated to these people on two PH.111 Cams marked 1 and 2, tried before and after hardening, that the thread has developed an out of truth error of approximately .003" in the case of No.1 cam, and approximately .002 on No.2 cam. The error on No.1 is detrimental to successful operation (but is possibly useable), whilst the error on No.2 cam is unimportant. I suspect the broaching makes the thread out of round but have not been able to prove this yet. RHC{R. H. Coverley - Production Engineer}/EG. | ||