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).
Design, materials, and lubrication for a .720 worm and nut assembly.
| Identifier | WestWitteringFiles\O\January1926-March1926\ Scan129 | |
| Date | 13th March 1926 | |
| TO BA. FROM R.{Sir Henry Royce} Copy to - CJ RY HS{Lord Ernest Hives - Chair} E.{Mr Elliott - Chief Engineer} ORIGINAL re. N.SCH. 2155. X8430 I am not in agreement with altering the .720 worm as now standard. It is for the Works to make them more uniform. They will always wear into a better condition. One feels that a well polished accurate worm is necessary, and that the nut should be cast on the thread, or cast on a good master. We thought a little while ago that the stronger metal coming down between the thread was not necessary: it would be so much simpler without this. Possibly the nut could be longer. Considering that we have the swivelling nut I feel certain the Works have nothing to complain about. It is a good test for oil efficiency, and the castor oil should shew up and have a more permanent film - (give steadier results.) R.{Sir Henry Royce} | ||