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).
Pitted spindle from a Bentley propellor shaft joint, attributing the fault to soft core and case hardening issues.
| Identifier | ExFiles\Box 87\3\ scan0092 | |
| Date | 10th August 1937 | |
| Memo handed to EM to have thickness of casehardening tried and in Lab. By.{R.W. Bailey - Chief Engineer} 11.8.37 K/W. By.{R.W. Bailey - Chief Engineer} Mx.{John H Maddocks - Chief Proving Officer} Rm.{William Robotham - Chief Engineer} 237 KINGSBURY. Rm{William Robotham - Chief Engineer}/GWH{George W. Hancock - Head Chateauroux}/DPB/10.8.37. BENTLEY PROPELLOR SHAFT. I am forwarding to you a spindle taken out of the rear mechanic joint which has been badly pitted by the roller bearings. The Kingsbury Depot are now balancing the prop: shafts and fitting the damper and are coming across this feature in the mechanic rear joint. In our opinion the cause is due to the core being too soft and the case hardening probably ground away to a fine limit. This also applies to the flanges for the needle rollers. It will be seen that the rollers have dug in at one end, which takes the thrust. This prevents the roller rolling round the shaft. The crosswise depression shews that the needle rollers have tried to roll round but have been prevented from doing so by the digging into the flange. Rm{William Robotham - Chief Engineer}/GWH.{George W. Hancock - Head Chateauroux} G.W.H. | ||