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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).
Trial of nitrifying hardening on 'SS' and aero engine components.

Identifier  ExFiles\Box 17\6\  Scan065
Date  19th November 1928
  
X7060
BY.{R.W. Bailey - Chief Engineer} from R.{Sir Henry Royce}
c. to BJ. Wor.{Arthur Wormald - General Works Manager}
c. to Hs.{Lord Ernest Hives - Chair}

RL/M19.11.28.

NITRIFYING HARDENING. X.4469 X.3822
X.7060 X.4003 X.7090

The first things to try in this are the 'SS{S. Smith}', and
aero engine, valve gear followers, and camshaft.

The thing it seems least suitable for is the
sliding change gear, and piston pins.

The SS.{S. Smith} cam followers should be put in hand at
once. It may be necessary to make them in this material, and
anyway they should be better.


R,
  
  


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