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).
Article from 'The Dragon' publication describing the spindle mounting of the Cleveland Single Spindle Automatic machine tool.
| Identifier | ExFiles\Box 115\2\ scan0552 | |
| Date | 1st November 1940 guessed | |
| The DRAGON Unique Wide-Range Work-Head Spindle Mounting Perfected 74 Fafnirs in New Cleveland Single Spindle Automatic WHEN THE ORIGINAL purchase of a large machine tool (such as an automatic screw machine) is under consideration, a the first demand of the experienced works manager is for a machine that is capable of faster and more accurate duplicate-production than the one he already has. This required combination of speed and precision depends almost entirely, as is agreed by authorities in the machine tool field, upon the actuating turret mechanism which controls the tools, and the mounting of the main spindle. In introducing their new Single Spindle Automatic, Model AA{D. Abbot-Anderson}, the Cleveland Automatic Machine Company, builders of machine tools since 1888, have therefore chosen with great care an exceedingly rigid and accurate spindle mounting that is guaranteed to fabricate perfectly smooth, chatter-free work. Designed to produce a wide variety of small pieces at higher speeds than heretofore possible, as well as handling large cuts for heavier drilling and counterboring operations (the speed range is from 203 to 3275 R.P.M.), this model is furnished with the main spindle mounted on six Fafnir Super-Precision (MM Type) Ball Bearings. The mounting itself is sufficiently unusual to repay an examination in detail. Because it was necessary to obtain a spindle that would not only support, without deflection, the heavy cutting loads encountered at slow speeds, but would also function well at the very high operating speeds attained with the use of modern, high-speed tool steel, Fafnir engineering experience recommended a ball bearing mounting which departed from the conventional. The new Cleveland Single Spindle Automatic (with attachments) is fully equipped with Fafnir Single Row Radial, Grease-Shield, Felt-Seal, Wireloc, Double Row, Thrust and MM9500 Series Bearings. The DRAGON Romanian Panorama Written especially for "THE DRAGON" By Ethel Chamberlain Porter ROMANIA IS A STRANGE, beautiful country tucked away on Europe's eastern boundary, a true child of the marriage of East and West. The Danube rushes swiftly along its southern border, then turns and drags its slow length along through vast marshes where strange birds swoop and cry, and silent fishermen catch sturgeon for caviar. To the north rise the Transylvanian Mountains, clothed in a mantle of dark firs, embroidered with the bright green of high pastures where shepherds tend their flocks. In the valleys and on the plains is that rich, black soil which makes Romania one of the great granaries of Europe. Before the World War of 1914, Romania was a small, crescent-shaped country cradled in the curve of the Danube. Now, after her absorption of outlying territory, she is about the size of New England and New York together, and has a population of just under twenty million. Corn, wheat and petroleum are exported in large quantities, and her exports are much greater than her imports. We motored through Romania in July when all the peasant world was out of doors. Before us stretched a rolling plain rimmed by distant blue mountains, and all across it the summer wind rippled through mile after mile of grain, golden and ripe for the harvest. Peasants in white linen shirts and trousers strode through the fields of wheat and rye, reaping the grain with their cradled scythes while Mother and the girls gathered it into shocks and loaded it onto carts drawn by water buffalo. Slowly the precious burden creaked down the rutty road to the village where it was threshed by a power machine. In the poorer villages, oxen plod round and round the threshing floor treading out the grain, or the sturdy housewife and her husband flail it out by hand. At home in the compact village with its one cobbled street, the grandmothers sit in the sun spinning wool or linen thread with distaff and spindle in the oldest way known to man. These people make all their own clothing with distaff, loom and needle, producing costumes intricately embroidered in rich and glowing colors. I know of no lovelier in all Europe. Little girls knit as they gently rock this year’s baby brother in his basket, hung from a beam. The older boys are spending the summer in the high mountain pastures, piping to their flocks and making snappy cheese of ewe’s milk, which will go well with Mother’s crusty brown bread, baked in her out-door oven. Women often invited us into their clean little houses and gave us bread and salt, the symbol of hospitality, or offered us “dulceatza,” 1 | ||