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).
To Mr. Hardy regarding the hardness testing of a roller from Messrs. Hoffmann.
| Identifier | ExFiles\Box 153\1\ scan0119 | |
| Date | 2nd February 1938 | |
| Mr.Hardy from RHC{R. H. Coverley - Production Engineer}/EG. RHC{R. H. Coverley - Production Engineer}/EG.2/DB.{Donald Bastow - Suspensions} 2.2.38. 1300 Herewith one Roller ex Messrs. Hoffmann, which gives a Rockwell reading varying from C.54 to C.59 on the cam contact track. This will be the equivalent of approximately 680 to 750 Brinell. Will you please return this to Messrs. Hoffman for their investigation. Goodall RHC{R. H. Coverley - Production Engineer}/EG. | ||