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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).
Implications of fitting an over-size broached hub on a Bentley, suggesting a drawbroach as a solution.

Identifier  ExFiles\Box 137\5\  scan0206
Date  13th April 1938
  
To RHC{R. H. Coverley - Production Engineer}/SB.{Mr Bull/Mr Bannister} from Rm{William Robotham - Chief Engineer}/GWH.{George W. Hancock - Head Chateauroux}
c. By
c. Rm.{William Robotham - Chief Engineer}
c. Hs.{Lord Ernest Hives - Chair}

1159

Rm{William Robotham - Chief Engineer}/GWH.{George W. Hancock - Head Chateauroux}2/N.13.4.38.

Hub Serrations - Bentley.
------------------------

With reference to your memo RHC{R. H. Coverley - Production Engineer}/SB.{Mr Bull/Mr Bannister}1/MC.8.4.38, the question of having to fit an over-size broached hub with brake drum complete, brings this into another unnecessary cost. The fitting of a new brake drum would mean that the brake straps would have to be re-adjusted and re-bedded. We do not wish to have to touch the brakes.

I have discussed this with RHC.{R. H. Coverley - Production Engineer} and a suggestion of a drawbroach was thought to be a possible solution.

Rm{William Robotham - Chief Engineer} /GWH.{George W. Hancock - Head Chateauroux}
  
  


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