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 Hoffmann Manufacturing Co. Ltd. regarding the load on bearings for a belt pulley.
| Identifier | ExFiles\Box 149a\3\ scan0254 | |
| Date | 30th August 1939 | |
| BRANCHES: LONDON, BIRMINGHAM, MANCHESTER, LEEDS, GLASGOW. AGENTS IN PRINCIPAL COUNTRIES THROUGHOUT THE WORLD. HOFFMANN Registered Trade Mark BALL AND ROLLER BEARINGS STEEL BALLS AND ROLLERS TELEPHONE: 3151 (FIVE LINES) TELEGRAMS: HOFFMANN, CHELMSFORD CODES USED: A.B.C. 5TH EDITION, BENTLEY PHRASE, BENTLEY 2ND PHRASE, MARCONI AND WESTERN UNION & LETTER THE HOFFMANN MANUFACTURING CO. LTD. CONTRACTORS TO THE ADMIRALTY, WAR OFFICE, AIR MINISTRY AND INDIA OFFICE. MESSRS. ROLLS ROYCE LTD., DERBY. CHELMSFORD. YOUR REF. ROY{Sir Henry Royce}/Dn.6/PB IN YOUR REPLY PLEASE QUOTE OUR REF. JHW/MES.114415 Dear Sirs, We thank you for your letter of the 24th. August, reference as above, which has been passed on to us by our Birmingham Office. With the spacing of the bearings and position of the belt pulley now given the journal load on one of the bearings will, of course, be appreciably higher than at first estimated. If, however, you can arrange so that the thrust load is taken on the more lightly loaded bearing then neither of the bearings under the present conditions will be quite so heavily loaded as would be the case if both bearings were sharing the belt load equally and one of them taking 76 lbs thrust in addition. Even so both bearings will be still more heavily loaded than we would recommend if 20 h.p. is transmitted. Assuring you of our best attention at all times, we remain, Yours faithfully, THE HOFFMANN MANUFACTURING CO. LTD., | ||