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 bearing test results and enclosing Test Report 610.B.
| Identifier | ExFiles\Box 114\2\ scan0048 | |
| Date | 20th July 1934 | |
| London Office: 17, VICTORIA STREET, WESTMINSTER, S.W.1. Telephone: VICTORIA 4278-4279 Telegrams: OFFISEUNDA, SOWEST, LONDON BALL & ROLLER R&M BEARINGS X3807 Telegraphic Address: "BEARINGS, NEWARK" Telegraphic Code: BENTLEY'S Telephone Nos: NEWARK 456-457-458. 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.FCH/MB. Your Ref. Messrs. Rolls-Royce, Limited, DERBY. 20th July, 1934. FOR THE ATTENTION OF -. GRYLLS ESQ: Dear Sirs, With reference to your visit of Wednesday last, we would confirm having handed to you the Hoffmann bearing No. N.1421 which has been on our test rig for 100 hours, under certain loading conditions, and we enclose copy of our Test Report 610.B. covering the test which was carried out. We believe this report will fully cover your requirements, it being remembered that the original loading was reduced in order to ensure that the visual indications on the bearing were not confused with overload failure. Unfortunately, certain signs of pending overload failure are evident, but on the other hand, in the case of the roller track, there are also very distinct signs of the effects of the full type construction, these also being noted on the rollers themselves. We would confirm that we will now put up in the same rig, one of our bearings 4/MDJT.35 for a run of 100 hours at the original loading in this test, viz: 1,420 lbs. thrust and 1,050 lbs. journal, at 4,500 r.p.m., and we will communicate with you in due course Enclosure | ||