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).
Ordering and fitting specifications for cast iron liners in aluminium brake housings.
| Identifier | ExFiles\Box 141\1\ scan0070 | |
| Date | 18th October 1935 | |
| Hs{Lord Ernest Hives - Chair}/Gry.{Shadwell Grylls} x1181 BY/EM.17/J.18.10.35. LINERS FOR FITTING TO ALUMINIUM BRAKE HOUSINGS. We have ordered from the British Piston Ring Co, six cast iron liners in accordance with your sketch for the above and we are now advised by the British Piston Ring Co, Limited, that they are supplying these in their Brimol Iron which has a coefficient of expansion of .000018". They advise us that liners in this material which have been inserted in aluminium housings and depending solely on an interference fit, have been tested by Messrs. Ferodo Limited, and found to function perfectly satisfactory. They advise on a 12" dia. liner that the amount of interference should be a minimum of .012" and a maximum of .020". BY/WP | ||