Rolls-Royce Archives
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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).
Recommendation to alter the thread count on the 'SS' tappet adjusting screw for finer adjustment.

Identifier  ExFiles\Box 17\6\  Scan069
Date  28th November 1928
  
To BY.{R.W. Bailey - Chief Engineer} from Hs.{Lord Ernest Hives - Chair}
c. to Wor.{Arthur Wormald - General Works Manager}
X7060
'SS{S. Smith}' TAPPET CLEARANCE ADJUSTMENT. X516
Hs{Lord Ernest Hives - Chair}4/LG28.11.28.
We find the thread on the tappet adjusting screw E.77712 is too coarse to permit easy adjustment of the tappets to fine limits. These screws are 22 threads/inch.
We recommend that this part is altered to have 26 threads/inch.
Hs.{Lord Ernest Hives - Chair}
  
  


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