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).
Inquiry to The Michigan Tool Co. about the supply and specifications of cone worm gears for a motor car engine.
| Identifier | ExFiles\Box 137\5\ scan0112 | |
| Date | 12th October 1934 | |
| X3720 Exptl. Dept. Hs{Lord Ernest Hives - Chair}/Smth.5/KW. 12th October, 1934. The Michigan Tool Co., 1717, Six Mile Road East, Detroit, Michigan, U.S.A. Dear Sirs, CONE WORM GEARS. We are looking into the matter of arranging an overhead camshaft to a motor car engine, and the possibility of providing it with a worm drive. With us, of course, silence and durability are questions of paramount importance, and we understand that you claim both these qualities for your cone gears. We should require two sets for an engine, one giving a 1/1 ratio and the other a 2/1 reduction. As regards centres, we are prepared to a certain extent to build the design round the gears, but 3½" would probably be the limit in both sets of gears. If you think you can help us in this matter we shall be glad to hear what claims you make regarding the silence and durability of your gears as applied to this job; also the proportions of the gears which will give the best results, the method of lubrication you recommend and any other design information which you are in a position to give us. We should be glad to know also whether any English Firms are licenced to manufacture these gears. Yours faithfully, FOR ROLLS-ROYCE LTD. | ||