Process of broaching the big end of a connecting rod.
| Identifier | WestWitteringFiles\B\January1918\ Scan17 | |
| Date | 28th January 1918 | |
| R.R. 235 A (400 T) (S.C. 536. 15-2-16) G. {Mr Griffiths - Chief Accountant / Mr Gnapp} 1546. EH. from R. {Sir Henry Royce} C. to Wor. {Arthur Wormald - General Works Manager} C. to BJ. X. 2750 RECEIVED 30 JAN 1918 ORIGINAL R10/W28.1.18. 3 Re - Broaching Big End of Connecting Rod. I am quite in agreement with the broaching of the big end of the connecting rod as suggested in yours of the 12th. I think it would be quite a good thing to push through a smooth broach for the finish. Many years ago we used to do this with white metal dynamo bearings. The broach mentioned has really a hardened ground and polished mandrill of a suitable size. In reading your memo it suggests that the rods are .00725" over the size of the crankshaft, that is you fitted them up with 7 1/2 thous. clearance. [Signature] R. {Sir Henry Royce} | ||
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).