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).
Letter from a supplier discussing the design and manufacturing of experimental 'Monikrom' camshafts.
| Identifier | ExFiles\Box 93\5\ scan0066 | |
| Date | 3rd January 1938 | |
| *Files* (Handwritten) Swell - See me (Handwritten) 607 (Handwritten) 307 (Handwritten) Rm{William Robotham - Chief Engineer} (Handwritten) The MIDLAND MOTOR CYLINDER Co. LTD. Telegrams RAFWORK SMETHWICK Telephone 1151-2-3 SMETHWICK Birmid Works, Smethwick Near Birmingham Our Ref:- TECH.DEPT. ECT/HA. Your Ref:-RM{William Robotham - Chief Engineer}/SWDL.{Len H. Swindell}11/MH.{M. Huckerby} Messrs. Rolls Royce Limited, DERBY. 3rd. January. 1938. Dear Sirs, We have your letter of the 31st December referring to "Monikrom" camshafts, for which we thank you. We note that you wish us to consider your drawing No.EW.1416 in place of EB.1085, and we confirm that there will be no price modification for the experimental pattern or castings. We see that there is now a spiral gear incorporated on the end of the new camshaft, and we consider the size of this quite inadequate for use in "Monikrom"; 14.D.P. being the minimum size we recommend. We suggest that a steel ring might be shrunk on to the shaft in the position shown, and the gear teeth cut in the steel. You will appreciate that the experimental shafts, being produced from a wood pattern, will have rather more machining allowance left on than would be the case in production, and it will be necessary to machine the shaft between each cam. We shall allow .047" extra metal all around the cams for rough and finish grinding, and in order to produce the correct shape on the pattern we should be glad if you would let us have a drawing of the cam form. | ||