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).
The manufacture and fitting of lead bronze bearings, and the necessary modifications required.
| Identifier | ExFiles\Box 27a\1\ Scan203 | |
| Date | 1st January 1935 | |
| Y4013 W/P - Sr. from Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer} Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer}9/KW.1.1.35. Lead Bronze Bearings. It has now been agreed that we shall manufacture 4 sets of lead bronze bearings for you and send them out so that you can fit them to 4 customers' cars. The problem is, how to fit these bearings to cars that have been running about to give them the correct clearance. We think we shall manage it by making the bore a little undersize and then supplying you with an expanding reamer so that you can bring them up to the dimensions of the pins. When the lead bronze bearings are fitted it will be necessary also to fit a larger oil pump and to make the stud through which the oil is fed to the timing gears in steel, as at present this is in German Silver and the one on 21-G-IV broke off due to the high oil pressure from the larger pump. Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer} | ||