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).
Proposed alteration to brake shaft bearing cap G.50755 to improve lubrication and prevent seizing.
| Identifier | WestWitteringFiles\O\2January1926-March1926\ Scan79 | |
| Date | 8th January 1926 guessed | |
| contd :- -2- the direction of the arrow C., tending to force the bearing for the brake actuating shafts off the shafts. Cases have occurred in which the distortion caused by attempted lubrication has remained permanent and to such a degree that the brake shafts were tightened up in their bearings and the brakes would not release after application. These cases are the extremes, in which the brake shafts are an exceptionally good fit in the bearing caps and probably also the oil flow from the bearing was further impeded by mud etc. At A.{Mr Adams} in Fig.2. is shown the standard bearing cap G.50755 in which oil is fed to the outer end of the brake shaft bearings, and has to pass along the total length of the bearing before any overflow is noticed. [Blueprint Diagram] ALTERATION TO G.50755 FIG. 2. A - STANDARD B - [MODIFICATION] .0625" DIAM HOLES, HOLES .100" DIAM., 120°, OIL GROOVE .100" WIDE .030" DEEP At B. is shown a modification of this in which oil is fed to an oil groove in the middle of the bearing and hence works outwards from this groove. Holes P. are drilled so that oil, after it has passed through the bearing, overflows and so prevents any pressure building up between the ends of contd :- | ||