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 a supplier discussing testing requirements for wheel bearings, half floating axles, and Bentley pinion bearings.
| Identifier | ExFiles\Box 115\1\ scan0070 | |
| Date | 18th September 1936 | |
| X1070 Exptl. Dept. Hs{Lord Ernest Hives - Chair}/Gry.{Shadwell Grylls}6/KW. 18th September, 1936. F.O. Hickling, Esq., Messrs. Ransome & Marles Ltd., Newark-on-Trent. Dear Hickling, Further to our conversation the other day about wheel bearings for half floating axles. I am wondering whether you could do a small amount of testing for us. We should prefer, from the point of view of saving weight, to use the LBJT.45 bearing instead of the MDJD type. Do you think that the former would stand 1750 lbs. at 600 revs. for ever ? By "for ever", 6,000,000 revolutions would suffice. I do not know whether it would be fair to do an accelerated test at higher speeds, but possibly you could decide this. We also have come to the conclusion that probably a 40 m/m.{Mr Moon / Mr Moore} half shaft would suffice for a Bentley with a wheel load of 1200 lbs. Is there any chance of your testing out for us one of these two conditions, running under journal load only ? By-the-way, the three special Bentley pinion bearings with the larger ball size have not got one of the outers ground down to a clearance. When we order some more, could you make sure that this is done, and also make the bearings of the snap type so that the outers cannot get altered with respect to the inner, which you will remember is differently machined at each end. Yours sincerely, | ||