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 regarding a discrepancy in drawing specifications for a bearing.
| Identifier | ExFiles\Box 153\1\ scan0058 | |
| Date | 22th September 1937 | |
| BRANCHES: LONDON, BIRMINGHAM, MANCHESTER, LEEDS, GLASGOW. AGENTS IN PRINCIPAL COUNTRIES THROUGHOUT THE WORLD. 1300 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 5 LETTER. THE HOFFMANN MANUFACTURING Co., LTD. CONTRACTORS TO THE ADMIRALTY, WAR OFFICE AND INDIA OFFICE CHELMSFORD. MESSRS. ROLLS ROYCE. LTD., NIGHTINGALE ROAD, DERBY. FJH{Fred J. Hardy - Chief Dev. Engineer} 202 ? 22nd September 1937. YOUR REF. IN YOUR REPLY PLEASE QUOTE OUR REF. JB/LGJ.DO-A.{Mr Adams} Dear Sirs, Referring to your letter of the 14th. September reference RM{William Robotham - Chief Engineer}/FJH{Fred J. Hardy - Chief Dev. Engineer}11/AP and bearing N2904 to your drawing No.F89670, in order to produce the outer race with a .875 plus .0 to minus .002" and assembled width over the inner races 1.257 plus and minus .003" as called for on your drawing, the protrusion of the inner race from the outers will be .1915" to plus and minus .001". Will you please bring your drawing into line. Drawing altered 11-11-37. ab. Yours faithfully, THE HOFFMANN MANUFACTURING CO., LTD., HC | ||