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).
Response to complaint report N.398 about a noisy rear hub bearing on chassis 3-AZ-114.
| Identifier | ExFiles\Box 96\1\ scan0281 | |
| Date | 16th February 1938 | |
| 361. To Br.{T. E. Bellringer - Repair Manager} from Rm{William Robotham - Chief Engineer}/FJH.{Fred J. Hardy - Chief Dev. Engineer} c. Rm{William Robotham - Chief Engineer}/GWH.{George W. Hancock - Head Chateauroux} Rm{William Robotham - Chief Engineer}/FJH.{Fred J. Hardy - Chief Dev. Engineer}6/MH.{M. Huckerby}16.2.38. RE COMPLAINT REPORT N.398 (CHASSIS 3-AZ-114) NOISY REAR HUB BEARING. We thank you for the rear hub bearing which you have returned to us. We have dismantled this bearing and find that it contains a considerable number of steel flakes and chips. These are undoubtedly the cause of the noise and have not come from the bearing itself. So far as we can see the most likely sources of these chips appear to be the bearing end cap G.54987/8 and the distance piece G.81898. Will you please let us know whether you have ever found evidence of rubbing or seizure between these parts, and, in particular, whether there has been such evidence when the bearings have been noisy. The clearance between the cap and the distance piece should be 0.015 - 0.022 on the diameter on chassis after 39 in A series. Have you found any with less clearance than this or do you think more clearance is required ? Rm{William Robotham - Chief Engineer}/FJH.{Fred J. Hardy - Chief Dev. Engineer} | ||