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).
Difficulties with a servo motor's ball bearing and thrust washer.
| Identifier | ExFiles\Box 73\1\ scan0175 | |
| Date | 27th May 1924 | |
| +9910 E.{Mr Elliott - Chief Engineer} Hs.{Lord Ernest Hives - Chair} CJ. BY25/H.{Arthur M. Hanbury - Head Complaints} 27. 5. 24. E.A.C.III. SERVO MOTOR. -------------------- Referring to E2/M.{Mr Moon / Mr Moore} 24. 5. 24. there was no real difficulty in connection with LeC.1867. By an oversight we had instructed Ball Bearing Steel. I discovered this in time, however, and modified it to C.H.N.S. In both cases we have used C.H.N.S. with soft bore and key. In fact, only hard where the thrust from the ball bearing comes. With reference to the cross binding which took place on the outer thrust washer, whilst possibly the locking serrations may not have been as good as they might have been so far as finish is concerned, it is obvious that the thrust on the face serrations overhangs the sliding surface of the keys, and the nett result of this must be to always put a twist on the washer, which would tend to cause the keys to cut in on the front and back. I am certain the only way to get these washers right is to carry the sliding surface of the key fore and aft of the adjustment serrations on the face of the cam. We await with interest the further sketch which you talk about. BY.{R.W. Bailey - Chief Engineer} | ||