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 broken steering roller from The Adamant Engineering Co., finding it was not made from case hardening steel.
| Identifier | ExFiles\Box 153\2\ scan0154 | |
| Date | 31th October 1936 | |
| J 1300 M.1217. To Rm{William Robotham - Chief Engineer}/F.J. Hardy. HL1/AG.31.10.36. Laboratory. Re: Broken Steering Roller ex The Adamant Engineering Co. The above steering roller submitted by you has been examined and we find that same has not been made from a case hardening steel. Hardness tests carried out in centre of cross section of roller C64/65. Micro-examination confirmed that the roller had no case and that the material from which it was made was similar to our Ball race steel i.e. High Carbon Chromium Steel. HL. / HC | ||