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 satisfactory nature and use of a gudgeon pin locking screw spanner.
| Identifier | ExFiles\Box 79\2\ scan0138 | |
| Date | 25th June 1914 | |
| R.R. 235A (150 H) (W.W. 315. 21-5-14) G.{Mr Griffiths - Chief Accountant / Mr Gnapp} 0570. From Exp. Dept. Copies to:- J.{Mr Johnson W.M.} R.{Sir Henry Royce} E.{Mr Elliott - Chief Engineer} Na.{Mr Nadin} Wor{Arthur Wormald - General Works Manager}/EHB/B25614. June 25th 1914. Report on Gudgeon Pin locking screw spanner. X.1160. This spanner, E.4320, I consider satisfactory. I think though that the Works should use a spanner of this type to tighten the screw up with when the engine is built. The tommy-bar on this spanner is quite as strong as necessary, but it is much weaker and shorter than what is used when erecting the engines. It is a somewhat difficult job to drive a gudgeon pin in so that the holes in the piston and the pin are exactly opposite, it generally means two or three attempts, at present as long as the screw will just start in the thread it is forced in with a long tommy-bar and the taper pulls the gudgeon pin into position. It is all right for a skilled man to do it that way as long as the pin is slacked off and tightened finally with spanner E.4320. | ||