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).
Follow-up letter from Ransome & Marles Bearing Co. regarding the analysis of a sectioned steering gear roller.
| Identifier | ExFiles\Box 153\2\ scan0095 | |
| Date | 24th August 1936 | |
| X1300 London Office: 17 VICTORIA STREET, WESTMINSTER, S.W.1. Telephone: ABBEY 3875 (2 LINES) Telegrams: OFFISLUNDA, SOWEST, LONDON Branch Offices: LONDON, BIRMINGHAM, MANCHESTER, LEEDS, NOTTINGHAM AND- BALL & ROLLER R&M BEARINGS F.J. HARDY 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. Our Ref. Tech.Dept. FOH/AD. Your Ref. Hs{Lord Ernest Hives - Chair}/FJH.{Fred J. Hardy - Chief Dev. Engineer}9/JH. Telegraphic Address: 'BEARINGS, NEWARK' Telegraphic Code: BENTLEY'S Telephone Nos: NEWARK 456-457-458-459 Branch Offices: SHEFFIELD, BRISTOL, GLASGOW, NEWCASTLE, DUBLIN, BELFAST. Messrs. Rolls-Royce, Limited, D E R B Y : 24th August, 1936. Dear Sirs, STEERING GEAR ROLLER: With further reference to our letter of the 7th instant, regarding the above, we have now sectioned the portion of the roller in question, and we are despatching this to you under separate cover in order that you may examine the section in conjunction with our previous and present remarks. From this section you will note that the main trouble has been in the depth of case, this being entirely removed from the conical portion of the bore, which of course is the roller track, and being exceptionally thin elsewhere, and the only portion of the surface which is hard at all is the O.D., this giving a Rockwell of C.61. It is certainly surprising to us that with this softness no indentation has occurred, and we can only assume that the service has been comparatively short, and that the wear due to softness has been able to develop prior to any indentation being experienced. Other points with respect to the condition of the material etc. will readily be apparent on examination of the section, and we can only conclude | ||