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).
Technical drawing of a component with a left-hand single thread.

Identifier  ExFiles\Box 170\2\  img100
Date  8th December 1931 guessed
  
L.H. SINGLE THREAD
HELIX ANGLE . 7° 11'
D.P. 6.61075
C.P. .69136
TOOTH FORM 0.15 P
ADDEN. .177
DEDEN. .205
T AXIAL .30000
P.R AXIAL 30°
P.R NORMAL 29° 25'
NOTES AND STOCK
G.M.C. X.1314-STEEL.
HEAT TREATMENT. S.S.G N°4.
STOCK SIZE
-2 1/8"-
.20633
.20573
1 7/8 +.01 -.03
3/16 R.{Sir Henry Royce}
  
  


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