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).
Bearing endurance testing, the replacement of Hess-Bright bearings, and sending parts to Mr. Royce.
| Identifier | ExFiles\Box 38\1\ Scan012 | |
| Date | 26th April 1917 | |
| R.R. 235a (500 Ty (S.D.) 408. 26-4-17.) Bm. 2/158/13. Contd:- an endurance run, but more with the idea of obtaining useful information. We know what the conditions are on the plain bearings and we could judge by their condition and the amount of wear what the loads actually are. It looks as though we have got to do something drastic as in spite of all the various changes tried on these bearings, we have not yet been able to find any bearing which is reliable. We have fitted up the gear with another set of ball bearings with spigotted cages. We are also using the standard Hoffman ball with spigotted cage in place of the Hess-Bright bearings. The reason these first bearings had not spigotted cages, was that the Hoffman could not supply them fitted, and we have had to make them ourselves. We are sending the ball bearings which have run in place of the roller bearings to Mr. Royce. EH. | ||