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 Ransome & Marles Bearing Co. Ltd. discussing the supply and specifications of bearings with spring rings.
| Identifier | ExFiles\Box 8\11\ 11-page025 | |
| Date | 27th March 1936 guessed | |
| COPY. RANSOME & MARLES BEARING CO.LTD. NEWARK-ON-TRENT. E/HDY.{William Hardy}1/HP. Tech.Dept. FOH/MB. Messrs. Rolls-Royce Limited. D E R B Y. Dear Sirs, With reference to your valued communication of the 27th ultimo, regarding bearings with spring rings, on the outside diameters, for endwise location, we note the sizes in which you are interested, and of the two we have only manufactured the MJ.35-G, the 1" being a size which we have not as yet developed. With regard to the prospect of this other size being included on our standard list, this is entirely controlled by the demand, and obviously up to the moment, no demand has been present for this hearing, and, therefore, until such time as a reasonable demand arises, we shall not be in a position to supply. We would also like to point out that the spring rings used on these bearings have up to the present been supplied by the users instead of by ourselves, but we are looking into the question of supplying the spring rings with the bearings, so that the assembly is complete when received by our customers. With regard to the question of difference in cost, this is only very slight, and naturally, a far greater amount is saved in the mounting than is incurred by the extra cost, as well as the improvement in machining etc. Referring to the durability of this scheme for gearbox work, we have applied these bearings for gearboxes for some two or three years with every satisfaction, but we would point out that we have not applied them where the thrusts are heavy such as is the case which you mention in the last paragraph of your letter. Provided the mounting was such that the main thrust came through the bearing and not through the spring ring we see no reason why these bearings | ||