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 The Avon India Rubber Co. Ltd. discussing the manufacturing tolerances of rubber washers for a filler cap.
| Identifier | ExFiles\Box 150\2\ scan0003 | |
| Date | 4th May 1938 | |
| 1280. MANUFACTURERS OF AVON TYRES, SPORTS SUNDRIES, FOOTWEAR, FLOORING & MECHANICAL RUBBERS Telegrams RUBBER, MELKSHAM Telephones MELKSHAM 120 (6 LINES) [Logo: The AVON INDIA RUBBER Co. LTD. Established 1885 SYMBOLS OF ENDURANCE] Chairman: MAJOR R.F.FULLER. J.P. Deputy Chairman SIR HERBERT E.BLAIN C.B.E., M.INST.T. Secretary & Accountant E.H.LOVELL. A.C.I.S. " Service Depots: LONDON :: BIRMINGHAM - BRISTOL - MANCHESTER NEWCASTLE - GLASGOW - BELFAST - DUBLIN - Our Ref. RWF/MDH Your Ref. RM {William Robotham - Chief Engineer} /STD.9/ GENERAL RUBBER GOODS DIVISION. RW/STD.3/MH. {M. Huckerby} Regd. Office & Works MELKSHAM, WILTS. 4th May, 1938. Messrs Rolls Royce Ltd. DERBY. For the attention of Mr. C.S. Steadman. Dear Sirs, Washer- Filler Cap Part No. EW.1666. With further reference to your letters of April 26th and 29th, we have examined the three specimen Washers and have gauged them for the thickness. We find they exceed the size of .15 by, from 5 to 8 thous. You will doubtless realise that it is very difficult to obtain absolute precision in cutting of Rubber Washers in a lathe. Our Operator was very careful at the time of cutting, but there is a certain amount of distortion of the rubber when the pressure of the cutting knife is applied and it is this factor which is difficult to control. The only really satisfactory way to obtain uniform size is by moulding and you will no doubt realise that the cost of producing the Washers by the moulded method would be very costly. The lathe is adapted for cutting 5/32" which is .156, and it has occurred to us that 9/64", or .140 might be more suitable for your work, and if the Washers are then slightly oversize you would probably find them perfectly satisfactory for the groove of your Filler Cap. -1- | ||