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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).
Tests on forced feed lubrication for hydraulic shock damper bearings and addressing oil leakage.

Identifier  ExFiles\Box 68\2\  scan0185
Date  5th March 1927
  
To DA.{Bernard Day - Chassis Design} from Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer}
X8520
Hs{Lord Ernest Hives - Chair}/Rm{William Robotham - Chief Engineer}4/LG5. 3. 27.

FORCED FEED LUBRICATION TO HYDRAULIC X235
SHOCK DAMPER BEARINGS.

Further tests which we have recently conducted have demonstrated that we cannot keep the oil in the shock damper with the present type of gland if we employ forced feed lubrication to the bearings, even when the bearings are a good fit.

We are however sending shock absorbers to France on the next 10,000 miles test car with forced lubrication to the bushes so that we can see what proportions the leak assumes after a long test.

The dimensions we have been trying are .015" hole and an annular groove of .010" width and .010 deep round the bearing.
  
  


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