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 material selection for gudgeon pins without interference fit for aero engines.
| Identifier | ExFiles\Box 86\2\ scan0114 | |
| Date | 26th October 1933 | |
| Rm{William Robotham - Chief Engineer} E.{Mr Elliott - Chief Engineer} Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer} X236. BY.4/G.26.10.33. GUDGEON PINS WITHOUT INTERFERENCE FIT. We note from Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer}1/KT. 24.10.33. the results of running pistons with gudgeon pins which could be pushed in cold by hand. The point which interests us at the moment is that apparently the gudgeon pin was supplied with the piston, and that it was made in K.E.805. We would like to remark that we wish to keep off proprietary steels, and that our experiences with KE.805 during the War period were not too good, a similar steel can be used, but personally I would prefer, if any departure was made from our Silico Manganese steel, to adopt S.Z.N.C.R. which is a case hardened type of nickel chrome steel, bought to our own specification. I am recommending these pins for aero engine work, and they are being tested out on the single cylinder unit, and are actually being used in the P.V.XII. engine. BY.{R.W. Bailey - Chief Engineer} By | ||