Differential drilling method for locking the nuts on the inner and outer lever bolts for shock dampers.
| Identifier | ExFiles\Box 56\1\ Scan254 | |
| Date | 24th December 1932 | |
| BY. {R.W. Bailey - Chief Engineer} HDY. {William Hardy} 235 HDY. {William Hardy} 2/M.24.12.32. C. to SG. {Arthur F. Sidgreaves - MD} WOR. {Arthur Wormald - General Works Manager} HS. {Lord Ernest Hives - Chair} E. {Mr Elliott - Chief Engineer} DA. {Bernard Day - Chassis Design} RHC. {R. H. Coverley - Production Engineer} SHOCK DAMPERS. Herewith is N.sch.3597 shewing a differential drilling for the locking of the nuts for the inner and outer lever bolts. Eight slots are provided in the nut, and three holes in the bolt giving 15º between the locking positions instead of 60º. The bolt is shewn drilled as for a Phantom connecting rod bolt as suggested by HS {Lord Ernest Hives - Chair} /RM. {William Robotham - Chief Engineer} for greater flexibility. We have not gone to a finer thread, as this should be accompanied by a longer nut which cannot be got in without alteration to the damper body. HDY. {William Hardy} | ||
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).