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 Humber Limited discussing two methods and costs for a specific machining job.
| Identifier | ExFiles\Box 126\2\ scan0090 | |
| Date | 27th January 1939 | |
| 1069. BY APPOINTMENT TO THE LATE KING GEORGE V.{VIENNA} CYCLE MANUFACTURERS TELEGRAMS & CABLES HUMBER, COVENTRY TELEPHONE:- 5041 HUMBER LIMITED COVENTRY LONDON SERVICE STATION CHASE ROAD WILLESDEN, N.W.10 IN REPLY KINDLY QUOTE: RCH/G 27th January, 1939 S.H.Grylls, Esq., Rolls-Royce, Ltd., D E R B Y. Dear Grylls, I received your letter and prints this morning and went into the matter as promised. As far as we are concerned, the position is this: We can definitely do the job and there are two ways of doing it. One [handwritten insertion above: the least] entails a new packing block being put one [handwritten insertion above: under] of the generators which would cost somewhere in the region of £15. and of course a special spiral guide and cutter would also be required. These would cost another £15. and £12. respectively. There is actually another way of doing it which would obviate the necessity of packing the machine and this would be by making a specially thin cutter less than 1/4" wide which would just be able to pass through the teeth of the gear which is being cut and clear itself in the .275" wide groove. A cutter in this case would require to be about 5" in diameter and of course a suitable spiral guide would also be necessary. In addition to the above, whichever way the job is done, special arbors and a steady bracket would be necessary to ensure accurate results. The machine which we think is capable of doing this is an ordinary standard Maxicut and the point which immediately arises is - if we can do this job on a Maxicut, in all probability your own people | ||