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 to The Excelsior Motor Co. Ltd. concerning the composition and application of AC.6. bearing material.
| Identifier | ExFiles\Box 115\5\ scan0018 | |
| Date | 2nd April 1938 | |
| BUY 272 Agents Copy Messrs. Rolls Royce FB/EHF. Attention of Mr. Bruce. 2nd April, 1938. Dict.1.4.38. The Excelsior Motor Co, Ltd., King's Road, Tyseley, Birmingham II. Dear Sirs, With further reference to your recent enquiry regarding AC.6. bearing material, and our reply of the 2nd March, we have pleasure in giving you further information concerning this material, and should be pleased to receive your instructions together with blue prints so that we may make up a number of experimental bearings for you, and perhaps you would let us know whether you require bearings supplied to you in the semi-finished condition, that is as regards the final boring of the bearing, or whether we are to completely machine even to the finished bore before despatching to you. General Composition. Nickel Manganese Tin Antimony Magnesium Silicon Iron 1.7% 0.7% 5.0% 0.50% 0.9% .50% .3% Specific Gravity ........ 2.95 to 3.00 Co-efficient of expansion - 0°C. to 150°C. .0000225 The following is an extract from Messrs.Rolls Royce's letter which we think will be a further guide to you for the successful application of this type of bearing. LUBRICATION. "We have found that lubrication plays a tremendously important part in successful bearing operation, and too great a care | ||