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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).
List of parts with modifications to the depth of case hardening and a note on thread practice.

Identifier  ExFiles\Box 18\6\  Scan047
Date  11th December 1919 guessed
  
-4-
to agree with standard practice of leaving a flat on top of thread.
REASON.- T. O.{Mr Oldham} request.

The following Parts have had the depth of case hardening added and other modifications:-
Rec: 7000.-
F.4637 - Shank for Lamp Bracket.
U. 920 - Shank for Lamp & Mudguard Brkts.
Rec: 7250.-
G.3952 - Pins for Hinge.
Rec: 7070.-
F.4969 - Sliding Piece.
F.4967 - Inner Plug.
F.4968 - Outer Plug.
Rec: 7110.-
F.{Mr Friese} 89 - Trunnion Screw.
Rec: 7050.-
T.1102 - Inner Ball Race.
U.13342- Ball End Stud.
F.{Mr Friese} 887 - Steering Worm Tube.
F.1423 -
Rec:7030.-
F.5722 - Roller for Rear Springs Supports.
F.4939 - Shackle Pin for Rear Spring Eye.
F.6459 - Roller Plate for "Nr." Side of Spring.
F.6460 - " " " "Off" " "
Rec: 7200.-
E.13762 - Sun Wheel Shaft.
Rec: 7040.-
U.12122- Ball End Stud. (Top Steering Lever).
F.6591 - " " " (Cross Steering).
F.6978 - Pivot Bush.
Rec: 7160.-
F.7261 - Ball End Stud (Upper).
F.7296 - Ball Pin Front Axle Shock Damper.
REASON.- Mr. Bailey's instructions.
  
  


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