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).
Description of various bearing types and lubrication methods using felt inserts.
| Identifier | ExFiles\Box 114\2\ scan0259 | |
| Date | 19th December 1935 guessed | |
| Felt inserts 33 are suitable for this purpose and since these are not in direct contact with the balls, the oil is not withdrawn from them any more rapidly than is permitted by the porosity of the collars 32. These insert members 33 are placed in position after the collars 32 have been placed on the balls 12 and the balls laid in the holes 21 of the retainer member 17. The felt inserts 33, and also the collars 32, are then saturated with oil and the member 18 is placed in position and secured in the manner indicated above. Loss of oil from the retainer 16 is negligible, since the only openings through which it may pass are the small clearances between each of the balls and the openings 21 and 22. In Fig. 4 is illustrated an application of the invention to a thrust bearing of the roller type, in which 35 are the rollers, which roll in the well known manner between raceways not shown in the drawing. The rollers 35 are spaced circumferentially of the bearing by retainer members or rings 36, between which are carried distributing members of the rigid, oil-permeable material in the form of shoes 37, adapted to engage the rollers 25 as shown. Each of the rollers 35 is engaged by two of the shoes 37 and the space between adjacent shoes is filled with oil-storage means such as felts 38 adapted to retain a large quantity of oil and feed it to the shoes 37 as required. Fig. 5 illustrates a modified form of the invention applied to a bearing such as shown in Figs. 1 and 2. In this arrangement the balls 39 are mounted in a retainer member 41, similar in construction to the retainer 16, which retainer 41 carries distributing members 42 of the rigid, oil-permeable material, as shown. One of the members 42 is arranged between each ball 39 and its adjacent ball, and is shaped to engage the curved surface thereof. The members 42 are provided with axially disposed recesses or openings 43 which are packed with oil-retaining means such as felt inserts 44, adapted to feed oil to the distributing members 42. - 6 - | ||