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).
Request to machine plungers for self-adjusting tappets (28-EX), including a list of current dimensions and clearances.
| Identifier | ExFiles\Box 17\6\ Scan292 | |
| Date | 26th July 1934 | |
| To RHC.{R. H. Coverley - Production Engineer} 4706D Hs{Lord Ernest Hives - Chair}/Swdl.{Len H. Swindell}17/KW.26.7.34. Self-Adjusting Tappets (28-EX). Will you please machine the plungers for this set of tappets to give a diametrical clearance of .00225 in their respective pedestal barrels. The following is a list of the dimensions and clearances taken by the inspection in their present condition :- No. Bore Dia. Plunger Dia. Clearance Dia. 1 .625 .6245 .0005 2 .625 .6245 .0005 3 .625 .6246 .0005 4 .625 .6246 .0004 5 .6252 .6248 .0004 6 .6252 .6246 .0004 7 .625 .6247 .0003 8 .625 .6245 .0005 9 .6253 .6248 .0005 10 .625 .6247 .0003 11 .6257 .6251 .0006 12 .625 .6245 .0005 Hs{Lord Ernest Hives - Chair}/L.H.Swindall. | ||