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).
The setting of the crown wheel and pinion for a Bentley rear axle.
| Identifier | ExFiles\Box 102\4\ scan0105 | |
| Date | 11th August 1939 | |
| K/KC. Rm{William Robotham - Chief Engineer}/GWH.{George W. Hancock - Head Chateauroux}10/G.11.8.39. BENTLEY REAR AXLE. I have had a talk with Hd.{Mr Hayward/Mr Huddy} and J.{Mr Johnson W.M.} Pritchard regarding the setting of the crown wheel and pinion. The drawing calls for one adjusting washer G.101174 as stated by G.{Mr Griffiths - Chief Accountant / Mr Gnapp} Webb, but in practice various sizes are used. I have arranged with Hd.{Mr Hayward/Mr Huddy} to supply you with a set of washers varying from .080 to .100, going up in .005. This is not fine enough actually to obtain the correct setting, and as J.{Mr Johnson W.M.} Pritchard remarks a surface grinder is required. The general practice found for setting is a ratio w of .001" of the washer equals .002" slack of the setting. J.{Mr Johnson W.M.} Pritchard keeps them on the tight side, and regulates to the tightest place when setting. You should receive the washer in due course, but as the Works have to make them it may be some time before you receive them. Incidentally, a surface grinder costs £900. Rm{William Robotham - Chief Engineer}/GWH.{George W. Hancock - Head Chateauroux} | ||