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).
Laboratory report on the metallurgical analysis and properties of a Bosch Starter Motor Pinion.
| Identifier | ExFiles\Box 62\1\ scan0028 | |
| Date | 1st March 1932 | |
| WST x043 6027 To Hs.{Lord Ernest Hives - Chair} HL.2/E4. 3. 32. Laboratory. Report No. L.2350. Re - Bosch Starter Motor Pinion. Analysis:- Copper - 76.8% Manganese - 1.62% Zinc - Nil. Iron - 6.12% Aluminium - 9.29% Nickel - 6.12% Brinell Hardness - 237. We have made in the past, experimental alloys of this type, and it would seem that this alloy is machinable even at the high hardness figure. It will also possess good wearing properties. If desired we could produce this material here. It will cast well owing to there being little tendency to "drawing" in the mould. HL. | ||