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).
Scheme for getting oil into the centre of gearbox shafts by means of screw threads.
| Identifier | ExFiles\Box 86\4\ scan0087 | |
| Date | 31th May 1934 | |
| +228 To E.{Mr Elliott - Chief Engineer} c. to By.{R.W. Bailey - Chief Engineer} c. to Hdy.{William Hardy} Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer}9/KW.31.5.34. While we were in America we noticed a scheme for getting oil in the centre of gearbox shafts by means of screw threads. This struck us as being a useful expedient, and we carried out tests to see what proportions of thread and clearance had to be used to get the best results. The attached report shows the data we have so far obtained. We can quickly test any screw thread of this nature which is designed to go in a gearbox. Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer} | ||