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).
Requesting an examination of a fractured steering roller from a Bentley, including its material specification.
| Identifier | ExFiles\Box 153\2\ scan0152 | |
| Date | 30th October 1936 | |
| 1300 To Hl/Mr. Whitehead. Rm{William Robotham - Chief Engineer}/FJH.{Fred J. Hardy - Chief Dev. Engineer}12/JH.30.10.36. Will you please examine the fractured steering roller which we have handed to you and let us know whether the condition of the material is as it should be. The part is from an experimental Bentley steering gear supplied to us by Messrs. The Adamant Engineer Co. and the material specification should be Carbon 0.10 to 0.20 Sulphur not more than .0.04. Phosphorous " " " 0.04 Chromium 0.75 to 1.1% Nickel 2.75 to 4.0 Manganere 0.3 to .05 Silicin Not more than 0.3 Case hardened all over to a depth of 0.035 - 0.045. Rm{William Robotham - Chief Engineer}/F.J.Hardy. | ||