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 The Hoffmann Manufacturing Co., Ltd. regarding a ball bearing for a torque tube and propeller shaft.
| Identifier | ExFiles\Box 49\1\ Scan371 | |
| Date | 18th July 1921 | |
| COPY. THE HOFFMANN MANUFACTURING CO,LTD.? CHELMSFORD. Essex, Messrs. Rolls Royce Ltd., DERBY. 18th July.1921. Attention of Mr Harvey Bailey. Dear Mr Bailey., TORQUE TUBE & PROPELLER SHAFT. RE GLEASON BEVEL THRUST. In reply to yours of the 15th inst., reference BY5-P15721, regarding the above, I would say that our no. 360 Ball Bearing is listed at a load of 3500 lbs at 1200 r.p.m. You will see from this, in conjunction with my previous remarks, that the bearing should have a fair chance of success, provided you can ensure the correct mounting as called for by such arrangement. When you have completed your bench tests I can possibly help you in passing an opinion on the condition of the tracks of the bearings as to whether this would give any extended life. I remain Yours faithfully., W Cooper | ||