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 C.C. Wakefield & Co. Ltd. about the failure of their EP oil in rear axle bearing tests due to carbon deposits and wear.
| Identifier | ExFiles\Box 145\2\ scan0034 | |
| Date | 25th May 1934 | |
| X/583 Exptl. Dept. HS{Lord Ernest Hives - Chair}/Gry.{Shadwell Grylls}8/KW. 25th May, 1934. Messrs. C.C. Wakefield & Co. Ltd., Wakefield House, 30/32, Cheapside, LONDON. E.C.2. Dear Sirs, Some time ago you sent to Messrs. Ransome & Marles 5 gallons of EP{G. Eric Platford - Chief Quality Engineer} oil for use in a rear axle bearing test they were conducting for us. They tell us that after 70 hours the tracks were covered with a black enamel-like substance and that the shoulders of the inner race were worn, a hard carbon deposit having formed between the cage and race. This is exactly what we have experienced on the road with this oil. We have attributed one cage failure to this deposit taking up all the clearance between the cage and inner race. In all cases considerable wear of the shoulders has been evident, and after 10,000 miles most of the oilways are silted up with a black deposit. In view of these criticisms we are wondering whether you have an extreme pressure lubricant that does not suffer from this deposit. From the bearing point of view Whitmore's Compound is a better lubricant. As you know, our interest in EP{G. Eric Platford - Chief Quality Engineer} oils was to be able to use an oil easier to obtain by the general public. Yours faithfully, FOR ROLLS-ROYCE LIMITED. | ||