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. discussing a dimensional issue with steering rollers.
| Identifier | ExFiles\Box 153\1\ scan0102 | |
| Date | 24th November 1937 | |
| HOFFMANN Registered Trade Mark BRANCHES: LONDON, BIRMINGHAM, MANCHESTER, LEEDS, GLASGOW. AGENTS IN PRINCIPAL COUNTRIES THROUGHOUT THE WORLD. BALL AND ROLLER BEARINGS STEEL BALLS AND ROLLERS THE HOFFMANN MANUFACTURING Co. LTD. CONTRACTORS TO THE ADMIRALTY, WAR OFFICE AND INDIA OFFICE. CHELMSFORD. TELEPHONE: 3151 (Five Lines) TELEGRAMS: HOFFMANN, CHELMSFORD. CODES USED: A.B.C. 5TH EDITION, BENTLEY PHRASE, BENTLEY 2ND PHRASE, MARCONI AND WESTERN UNION 5 LETTER. MESSRS. ROLLS ROYCE LTD., DERBY. November 24th. 1937. YOUR REF. IN YOUR REPLY PLEASE QUOTE OUR REF. CHS/AMB.102727 FOR THE ATTENTION OF MR. F.J. HARDY. Dear Sirs, STEERING ROLLERS. Further to our letter of yesterday's date, we have found during the manufacture of bearing No. N.2891, your part No. F.8944, that when worst cases of limits meet, the parallel outer faces are entirely eliminated by the bevel faces, which are at an angle of 17° 50'. This is, of course, aggravated by the increase in the track diameter, and results in a small reduction in the width of the outer member, which brings it below limit. As, however, this dimension appears to be quite unimportant and the extreme end surfaces are clear of surrounding parts, we are ignoring the limit in manufacture, and trust this meets with your approval. Yours faithfully, THE HOFFMANN MANUFACTURING CO. LTD. C.H. Smith Technical Manager. Handwritten text: F H 1300. FJH{Fred J. Hardy - Chief Dev. Engineer} | ||