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).
Technical memorandum discussing the difficulties encountered when forging a front axle.
| Identifier | ExFiles\Box 67\2\ scan0176 | |
| Date | 29th September 1925 | |
| - 2 - BY8/H.{Arthur M. Hanbury - Head Complaints} 29.9.25. -------------- that in the axle this will be the only remedy that can be applied. Obviously, the main cause of the difficulty with the front axle particularly is that the section called for is so small relative to the mass of the dies in which the piece has to be forged, that immediately the hot forging is dropped into position in the axle, it receives a very distinct cooling effect, and rapidly gets to such a stage of hardness due to cooling that the hammer cannot cause the material to flow materially, and the blow becomes a very heavy impact throwing a tremendous load on to the dies and tending to split them, particularly in view of the fact that the top and bottom members of the 'H' section are slightly taper, and act as powerful weights to expand and split the dies as the forgings cool. [Illegible circular stamp '804'] BY.{R.W. Bailey - Chief Engineer} [Handwritten signature] MADE AT CROXLEY | ||