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 Adamant Engineering Co. Ltd. detailing a leadless paste lubricant for spline punching operations.
| Identifier | ExFiles\Box 153\1\ scan0098 | |
| Date | 22th November 1937 | |
| 22nd November, 1937. MESSRS ROLLS ROYCE LTD. ADAMANT SPECIAL LUBRICANT FOR SPLINE PUNCHING OPERATION. Originally we used pure White Lead diluted with boiled Linseed Oil to a consistency of creamy paste, but due to trouble with the Home Office we had to discontinue, and after numbers of experiments, arrived at a leadless paste that gives us results nearly equal to the pure White Lead. This leadless paste is supplied to us by Messrs. Pinchin Johnson Ltd, and is know as their Grade 'T'. Pinchin Johnson will recognise this, especially if you say "as supplied to the Adamant". for ADAMANT ENGINEERING CO.LTD. [Signature] Sales Manager. | ||