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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).
Suitability of Michell Thrust Bearings for high-speed applications on a chassis.

Identifier  ExFiles\Box 20\7\  Scan043
Date  27th October 1921
  
X547

To BY.{R.W. Bailey - Chief Engineer} from R.{Sir Henry Royce}
c. to CJ.
c. to hs.{Lord Ernest Hives - Chair}
c. to E
c. to Da.{Bernard Day - Chassis Design}
c. to EP.{G. Eric Platford - Chief Quality Engineer}

R2/G27.10.21.

X.4150 - RE MICHELL THRUST BEARINGS. X.547.

With reference to your memo. BY5/P25.10.21, I quite agree that these bearings are wonderful. Ordinary ball thrusts are not good for high speed. I am now recommending either "deep race" or "New Departure". Michell type depend so much on a good and constant supply of clear oil, which we cannot rely upon on a chassis, but I agree we must cease to use present standard for high speed.

R.{Sir Henry Royce}
  
  


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