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).
Boring tool made by Kingsbury for crank journal bearings and its benefits.
| Identifier | ExFiles\Box 114\3\ scan0072 | |
| Date | 23th September 1938 | |
| To By.. from Rm{William Robotham - Chief Engineer}/GWH.{George W. Hancock - Head Chateauroux} Rm{William Robotham - Chief Engineer}/GWH.{George W. Hancock - Head Chateauroux}5/N.23.9.38. Crankshaft Journals. Kingsbury have made a boring tool for the crank journal bearings. For service work it is ideal as any bearing can be bored to the correct clearance irrespective to the wear of the journal, thus keeping the centre line of the crankshaft correct. A number of journal bearings have been bored out and the finish is very good. A noticable feature is the oil pressure is higher with engines that have had the journals bored to correct clearances, than those previously bedded in the hard scraping method. We now appreciate your remarks re a bowed crankshaft. With a set of bearings bored out correct, the crank revolves freely. GWH.{George W. Hancock - Head Chateauroux} | ||