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 detailing the production requirements and schedule for various rubber components and steel inserts.
| Identifier | ExFiles\Box 104\1\ scan0185 | |
| Date | 8th August 1934 | |
| Hs{Lord Ernest Hives - Chair}/Tes.11/MJ. -2- 8th. August, 1934. despatch these rubbers by Thursday night if possible so that we can carry out tests on them during the time that our Works are closed next week. When you have completed this order further supplies will be required to the new diameter, i.e. exactly similar to the drawing I left with you. We should like you to cut the present mould about in order to produce the new rubbers, and should like four rubbers moulded to the new diameter by Monday, the 27th. inst. F.60354. - This is only a bush and we presume can be made on a mandrill, thus needing no mould. We are therefore expecting this week - 2 off F.60398, 2 off F.60399, and 12 off F.60364 (3 different hardnesses) By the 27th. inst. we hope you will be able to complete this order, and if possible send four rubbers to the modified mould of F.60364 durometer 40. The first Production Order will be for 150 car sets. That is, 300 off F.60398, F.60364 and F.60354 then 150 off F.60351/2. We will require you to commence delivery by October 1st. at the minimum rate of 20 car sets per week. I am giving you this unofficial information so that you can prepare the necessary moulds for dealing with production quantities. We shall want you to supply the steel inserts F.60400/1/2 and F.60411 for Production orders. A second mould for F.60398 seems to have been made in our Works. This has been made to Leyland & Birmingham's drawing, and is similar to the one you have except that we have added location pins for the ring. The pins, however, appear to locate the ring from the bottom instead of the top. There also seems to be the same difficulty about removing the rubber. This mould will be sent on to you as the finish may be preferable to the mould you already have. Will you please alter this mould to suit your requirements. We wish to prevent the exposed surfaces of the steel inserts in rubber F.60398/9 from rusting. Can you paint these with a rubber solution after moulding? We attach herewith a scheme drawing of the rubber assembly shewing the exposed surfaces. The other parts of the metal inserts should be kept free from rubber. If it is not easy to paint these as required it may be | ||