Toolmaking

“ The great and small tools, the automata of the machine-shop, are no less triumphs of mechanical genius than the “powerful oscillating engines of the Warrior.” The prime difficulty of the hand-worker was to make two things exactly alike, then followed the impossibility of making many things—the narrow limit of human capacity to produce. At that point the inventor appeared with a machine which would make a thousand things in the time the hand-worker required to make one, and each one of them the exact counterpart of every other. ”

“ The division of labour suggests the contrivance of tools and machinery to execute its processes.—When each process, by which any article is produced, is the sole occupation of one individual, his whole attention being devoted to a very limited and simple operation, improvements in the form of his tools, or in the mode of using them, are much more likely to occur to his mind, than if it were distracted by a greater variety of circumstances. Such an improvement in the tool is generally the first step towards a machine. ”

“ Fairbairn think could he see the wonderful machinery with which the present-day workshop is equipped—machinery as relatively superior to the devices he speaks of as they were superior to the unaided efforts of the human hand? Invention never stands still. The wonder of one year is on the scrap-heap of abandoned [60] machines almost before another twelve months have passed. Some important detail has been improved, to secure ease or economy in working, and a more efficient successor steps into its place. ”

“ The principle of the invention consists in constructing and fitting the rest so that, instead of being screwed down to one place, and the tool in the hands of the workman travelling over it, the rest shall itself hold the cutting tool firmly fixed in it, and slide along the surface of the bench in a direction exactly parallel with the axis of the work. Before its invention various methods had been tried with the object of enabling the work to be turned true independent of the dexterity of the workman. ”

“ Nowhere do you find him without tools: without tools he is nothing; with tools he is all." His very first contrivances to support life were tools of the simplest and rudest construction; and his latest achievements in the substitution of machinery for the relief of the human hand and intellect are founded on the use of tools of a still higher order. Hence it is not without good reason that man has by some philosophers been defined as A TOOL-MAKING ANIMAL.
Tools, like everything else, had small beginnings. With the primitive stone-hammer and chisel very little could be done. ”

“ The purpose of this book is to bring out the importance of the work and influence of the great tool builders. Few realize that their art is fundamental to all modern industrial arts. Without machine tools modern machinery could not be built. Little is known by the general public as to who the great tool builders were, and less is known of their lives and work. ”

“ There is no economy in making men work with poor light, bad air and in a cold place.
Buying Machine Tools.—Having secured by lease or by purchase a shop, or factory suitably located your next effort will be directed toward equipping it with the proper tools and machinery.
Besides the usual machinists’ hand tools you should buy (1) a gas furnace; (2) a grinder; (3) a plain lathe; (4) a screw cutting lathe; (5) a drill press; (6) a planer; (7) a shaper; (8) perhaps a milling machine, and (9) a buffer. Several of each of these kinds of machines may be needed.
Fig. ”

“ Let any one attempt to describe the much more simple and familiar process by which a shoemaker makes a pair of shoes, and he will find how inadequate mere words are to describe any mechanical operation. [13] Suffice it to say, that the machinery was of the most beautiful manufacture and finish, and even at this day will bear comparison with the most perfect machines which can be turned out with all the improved appliances of modern tools. The framing was of cast-iron, while the parts exposed to violent and rapid action were all of the best hardened steel. ”

“ In a word, this was possible because the art of cutting metals involves a true science of no small magnitude, a science, in fact, so intricate that it is impossible for any machinist who is suited to running a lathe year in and year out either to understand it or to work according to its laws without the help of men who have made this their specialty. Men who are unfamiliar with machine-shop work are prone to look upon the manufacture of each piece as a special problem, independent of any other kind of machine-work. ”

“ There are hundreds of drill press hands who cannot operate a milling machine, lathe hands who know nothing of planer work, and so on. The subdivision of these occupations follows closely the advance in invention, so that employers advertising for help frequently specify not only the machine tool to be used but add the name of the firm which manufactures that particular type of machine, with the result that there are about as many kinds of machinists as there are manufacturers of machine tools. ”

“ As to tools a distinction is also made between machine tools and general shop or hand tools. Machine tools are those with which the machine does its work. Thus, cutting tools for use with any particular machine, auxiliary equipment used for some operations, but not for others, and the like, constitute a very essential and component part of the machine and should be recorded and valued with the machine even though the tools [Pg 282] need to be replaced much more frequently than the machine. ”

“ TOOLS AND MACHINES.—In modern days no small amount of skill has been directed to the devising of tools and machines for the more facile and exact production of whatever costs labor. Factories have become monuments of ingenuity, and museums in the useful arts. Improved machinery lightens the toil of the sailor. Machines in a great variety facilitate agricultural labor. They open the furrow, sow the seed, reap and winnow the harvest. In-doors, the sewing-machine performs a great part of the labor formerly done by the fingers of the seamstress. ”

“ If under certain conditions the hand tool does not operate to advantage, these conditions may be varied by a simple movement of the hands, altering the height of the tool to the work, the angle of the cutting edges to the work, or the rate of feed, as the case may be, and instantly perceiving the effects; whereas with tools held by mechanical means, such alterations would involve the expenditure of considerable time in loosening, packing, and fastening the tool, and adjusting it to position. ”

“ With the desire of rendering the valuable services of the Planing Machine applicable to the smallest detail parts of machine manufacture, I designed a simple and compact modification of it, such as should enable any attentive lad to execute all the detail parts of the machines in so unerring and perfect a manner as not only to rival the hand work of the most skilful mechanic, but also at such a reduced cost as to place the most active hand workman far into the background. ”

“ The work stands without a rival. It is a complete practical treatise on the art of American Tool Making and system of interchangeable manufacturing as carried on to-day in the United States. In it are described and illustrated all of the different types and classes of small tools, fixtures, devices, and special appliances which are in general use in all machine manufacturing and metal working establishments where economy, capacity, and interchangeability in the production of machined metal parts are imperative. ”

“ London, 1793, in which, whether justly or not, Huntington makes Bramah appear to murder the king's English in the most barbarous manner.
CHAPTER XII. HENRY MAUDSLAY. "The successful construction of all machinery depends on the perfection of the tools employed; and whoever is a master in the arts of tool-making possesses the key to the construction of all machines..... The contrivance and construction of tools must therefore ever stand at the head of the industrial arts."—C. BABBAGE, Exposition of 1851. ”

“ It is singular, that with the immense variety of tools set forth in the preceding chapter, how few, really, require the art of the workman to grind and sharpen. If we take the lathe, the drilling machine, as well as the shaper, planer, milling machine, and all power-driven tools, they are merely mechanism contrived to handle some small, and, apparently, inconsequential tool, which does the work on the material. ”

“ A tool is usually more simple than a machine; it is generally used with the hand, whilst a machine is frequently moved by animal or steam power. The simpler machines are often merely one or more tools placed in a frame, and acted on by a moving power. In pointing out the advantages of tools, we shall commence with some of the simplest.
(11.) To arrange twenty thousand needles thrown promiscuously into a box, mixed and entangled in every possible direction, in such a form that they shall be all parallel to each other, would, at first sight, appear a most tedious occupation ”

“ As users of these tools we cannot begin to compare with the skilled workman of ancient days. Our progress is shown not in the development of skill, but in the loss of it. We have taken the tool out of the human hand and put it into an inanimate machine. It is only very recently that the tool was delivered to the machine and that act marked the dawn of the present remarkable mechanical era. ”

“ The real problem is how to remove chips fast from a casting or a forging, and how to make the piece smooth and true in the shortest time, and it matters but little whether the piece being worked upon is part, say, of a marine engine, a printing-press, or an automobile. For this reason, the man with the slide-rule, familiar with the science of cutting metals, who had never before seen this particular work, was able completely to distance the skilled mechanic who had made the parts of this machine his specialty for years. ”

“ The simplest application of a principle of mechanics to an every-day hand-tool may convert it into what is called a machine. Take a three-pronged fork—one of the universal tools;—fasten a rope to the end of the handle; put a log under the fork as a fulcrum; and we have a lever, when pulled down by the rope, which will grub up a strongly-rooted large shrub in a few minutes. The labourer has called in a powerful ally. The tool has become a machine. ”

“ In a milling machine the cut is carried continuously from its commencement to its end, whereas in a shaping or planing machine the tool does not usually cut during the back or return stroke. In either of these machines, therefore, the operator’s skill is required as much in measuring the work, setting the tools feeds, &c., as in shaping the tools, whereas in the milling machine all the skill required lies in the chucking and adjustment of the work to the cutter, rather than in operating the machine, which may therefore be operated by comparatively unskilled labor. ”

“ Without tools, that is, by the mere efforts of the human hand, there are, undoubtedly, multitudes of things which it would be impossible to make. Add to the human hand the rudest cutting-instrument, and its powers are enlarged: the fabrication of many things then becomes easy, and that of others possible with great labour. ”

“ In contriving tools and simplifying processes, the operative workmen are, perhaps, most successful; but it requires far other habits to combine into one machine these scattered arts. A previous education as a workman in the peculiar trade, is undoubtedly a valuable preliminary; but in order to make such combinations with any reasonable expectation of success, an extensive knowledge of machinery, and the power of making mechanical drawings, are essentially requisite. ”

“ Hundreds of others, however, as managers, superintendents, chief draftsmen and tool makers, have perhaps done more to spread throughout the country the methods and standards of accuracy which have made American machine tools what they are. ”

“ The engineer's plane more resembles the turning-lathe, of which indeed it is but a modification, working up on the same principle, on flat surfaces. The tools or cutters in Clement's machine were similar to those used in the lathe, varying in like manner, but performing their work in right lines,—the tool being stationary and the work moving under it, the tool only travelling when making lateral cuts. ”

“ I may mention that, in order to effect the prompt and perfect execution of this order, I contrived several special machine tools, which assisted us most materially. These tools for the most part rendered us more independent of mere manual strength and dexterity, while at the same time they increased the accuracy and perfection of the work. They afterwards assisted us in the means of perfecting the production of other classes of work. ”

“ Shown by great firms from almost every state and territory were devices of various forms: Motors and apparatuses for the generation and transmission of power—fire-engines and other appliances for extinguishing a conflagration—machine tools and devices for working metals—machinery for the manufacture of textile fabrics and clothing, for cutting wood, for typesetting, printing, embossing, book making and paper working, lithography, and photo-mechanical process, for working-stone, clay, and other minerals. ”