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).
Letter from Aubert & Duval regarding the grinding process for shafts and gears after nitro hardening.
| Identifier | ExFiles\Box 154a\1\ scan0139 | |
| Date | 2nd February 1929 guessed | |
| contd :- -2- We would remind you that shafts and gears are never finally ground after nitro hardening. Tappets alone have their surfaces ground to a depth of from .002 to .0035". In this case the surface blows are violent and one is obliged to remove this depth of outer layer. Yours faithfully, FOR : AUBERT & DUVAL. | ||