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. regarding the elongation of holes in bearing cages and misalignment.
| Identifier | ExFiles\Box 136\2\ scan0070 | |
| Date | 28th March 1939 | |
| 1153 London Office 17, VICTORIA STREET, WESTMINSTER, S.W.1. Telephone: ABBEY 3875 (2 LINES) Telegrams: OFFISLUNDA, SOWEST, LONDON BALL & ROLLER R&M BEARINGS Telegraphic Address: "BEARINGS, NEWARK" Telegraphic Code: BENTLEY'S Telephone Nos: NEWARK 456-457-458-459 Contractors to H.M. Admiralty, War Office, Air Ministry, Colonial Offices &c. RANSOME & MARLES BEARING Co., LTD. MANUFACTURERS OF BALL & ROLLER BEARINGS NEWARK ON TRENT. Branch Offices: LONDON, BIRMINGHAM, MANCHESTER, LEEDS, NOTTINGHAM AND- Branch Offices: SHEFFIELD, BRISTOL, GLASGOW, NEWCASTLE, DUBLIN, BELFAST. Our Ref. Tech.Dept. FOH/AD. Your Ref. Rm{William Robotham - Chief Engineer}/FJH.{Fred J. Hardy - Chief Dev. Engineer}6/MH.{M. Huckerby} Experimental Dept. F.J. Hardy, Esq., Messrs. Rolls-Royce, Limited, D E R B Y. 28th March, 1939. Dear Mr. Hardy, With reference to your letter of the 22nd February last, I must apologize for not replying, although I had hoped to discuss this matter with you during my recent visit, and must apologize for the circumstances which made this impossible. Referring to the elongation of the holes in the cages, I did mention to Grylls the fact that prior to receiving your letter I had been investigating the possibility of whether the particular feature had been discovered and utilized elsewhere, although my investigation was not with a view to any question of a patent but rather to ascertain whether anyone else had come up against this trouble, and to get some verification that they had taken similar steps to ourselves. It is only within the last six months that I have obtained a copy of the New Departure Hand Book, and the following is an extract dealing with cages or separators:- "Possible misalignment is another factor which necessitates a certain clearance around the balls in the separator pockets. When operating in a misaligned condition, the balls in diametrically opposite parts of the bearing must roll higher up on the raceways, that is, away from the center of the grooves, but on opposite sides. Thus, during each revolution, the balls must rapidly change from one | ||