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 results of a bearing test.
| Identifier | ExFiles\Box 84\4\ scan0187 | |
| Date | 26th April 1937 | |
| London Office: 17, VICTORIA STREET, WESTMINSTER, S. W. 1. Telephone: ABBEY 3876 (2 LINES) Telegrams: OFFIISLUNDA, SOWEST, LONDON BALL & ROLLER R&M BEARINGS Contractors to H.M. Admiralty, War Office, Air Ministry, Colonial Offices &c. Telegraphic Address: "BEARINGS, NEWARK" Telegraphic Code: BENTLEY'S Telephone Nos: NEWARK 456-457-458-459 RANSOME & MARLES BEARING CO., LTD., MANUFACTURERS OF BALL & ROLLER BEARINGS NEWARK ON TRENT. Branch Offices: LONDON, BIRMINGHAM, MANCHESTER, LEEDS, NOTTINGHAM AND - SHEFFIELD, BRISTOL, GLASGOW, NEWCASTLE, DUBLIN, BELFAST. Our Ref. Tech.Dept. FOH/AD. Your Ref. Rm{William Robotham - Chief Engineer}/Gry{Shadwell Grylls}10/R.{Sir Henry Royce} 328, N20 2, 302 S.H. Grylls, Esq., c/o Messrs. Rolls-Royce, Ltd., DERBY. 26th April, 1937. My dear Grylls, Many thanks for your letter of the 21st instant, and as I anticipated you were equally pleased with the results of this test. With regard to the tracks in the outers, there is nodoubt that this has moved around slightly during the test, giving the results which you have noted of the tracking being equally distributed all around the outer, but I would like to point out that I am confident that they did not creep round slowly, but rather did they take up a new position every so often, this probably occurring at the beginning of every week when the job was re-started again after standing for the week-end. With regard to the question of pre-loading, while there was actually no pre-load, the amount of slackness was very slight, probably being only in the region of .0005", and in this respect I am afraid that our test has not absolutely copied service conditions, as normally I should consider it advisable for this bearing in this position to have a side play of .002", thus allowing for the deflections which occur in this position, and other minor inaccuracies. I trust the foregoing remarks will clear up this matter further, and trust you are in the best of health etc. Yours sincerely, F.{Mr Friese} O.{Mr Oldham} Hickling | ||