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Title: |
1879 Article-Tanite Co., Model D Grinder |
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Source: |
The Implement & Machinery Review, V4 #48, 01 Apr 1879, pg. 2144 |
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Insert Date: |
11/18/2014 1:08:01 PM |
An accurate comparison of the value of the emery wheel over the file is that which places it in the position of the circular steam saw in comparison with the old hand saw. The emery wheel is a file of the highest attainable order, which travels at the rate of 5,500 ft. per minute as compared with a hand file traveling at about 60 ft. per minute. A file grows dull quickly after it has begun to be used; an emery wheel never grows dull until all its substance is wholly consumed. Its cutting edges are down to its foundation. A file that is required to work steel is the action of steel upon steel, whereas the emery wheel is a substance harder than any metal, it can be out only with a diamond, and it is capable therefore of rendering a good account of the hardest steel against which it can be set. Pithily, yet accurately it is said: “He quips his factory with suitable solid mounted emery wheels; he yokes a steam engine to his files instead of men." And it is of solid emery wheels that we have been speaking. The wooden wheel, encircled with a leather band faced with emery, is a much less economical and effective tool for anything like hard work than the solid wheel. As the solid wheel is superior to the hand file so likewise is it superior to the grindstone, for emery cuts faster and lasts longer than sand, since the artificial mixture which constitutes the solid wheel is more even in grit than the natural mixture which constitutes the grindstone, and because of that evenness the solid wheel can be run faster than the stone.
There is little room for question that the solid emery wheels of the Tanite Company, Stroudsburg, Pa., U.S.A., are of very high order of merit. That merit puts the company in the position of being able to demand for their products a higher price than is, we believe, secured by any other emery wheel firm in existence; yet it is admitted that the wheels of the Tanite Company wear out more rapidly than the wheels which may be bought at a very much lower figure. The higher first cost of these wheels excites reasonable apprehension when their intrinsic merits are not accurately known. Messrs. G. W. Murray & Co., engineers, iron-founders, and machinists, manufacturers of agricultural implements, &c., of the Banff Foundry, Scotland, bought some of these wheels early in '74. The wheels were of the ordinary shape, with square edgings for dressing castings and general work, but there were some also specially made for Messrs. Murray by the Tanite Company to be used in dressing the teeth of fine-pitched wheels. Writing to the Tanite Company on the 3rd of May, 1875, Messrs. Murray made a statement of which Mr. Dunkin Paret, the president of the company, is fairly proud. It was: “The first cost being so high, and the rapid way they wear, made us give them up at first and go back to the London-made emery wheels; but our men (who do their work by piece) agreed to reduce the price so much ‘if we would supply them‘, as they said, ‘with the fine kind of wheels they had last,’ that the reduction does more than pay for the wheels altogether." The manufacturers produce their solid wheel in a manner, which is a trade secret; all they state is that it is made of waste products, and they claim for it a base free from the defects of all systems previously adopted. They have given to it the name of Tanite and its constitution has supplied them with the motto of their firm—Exinutili Utilitas.
"Benefit out of the useless" it is only fair to conclude that the Tanite Company will secure, for it is beyond question that their invention is capable of conferring great benefit upon all the mechanical engineering and other metal-working branches. Such small work as the preparing for gun and pistol locks is done with so much economy that in one case where (in Austria) six machines have been introduced into a factory, the proprietor has been able to dispense with 70 operatives. The simplest use of the wheels is in the mere removal of metal, as where castings, rough from the foundry sand, require their gates, fins, and spunes ground off. The next use is in the fitting of castings, whether of iron, of brass, or of steel. They are of immense value in the working and polishing of cast steel ploughs; and it is worthy reflection that their use permits of a metal so hard as to be otherwise unworkable. They will even break through the scale of castings before they are put in the lathe.
As we last month remarked, the value of the emery wheel is immensely increased by the machine in which it is fitted. We illustrate one of the machines made by the Tanite Company— for they produce emery grinding machinery as well as emery grinding wheels. It is the reversible rest single-wheel grinder. It runs wheels up to 8 in. diameter by 2½ in. thick, and has a 1½, in. steel arbor and cone pullies. The countershaft consists
of 6 in. tight and loose pullies, belt shifter, and cone pullies 12 and 13 in. diameter, and is attached to machine unless otherwise ordered. This machine stands on floor, to centre of arbor 37½ in., size of base 35 in. by 20 in. It is especially designed to meet the requirements of machine shops, where only one wheel is desired, and is also adapted for sharpening and gumming saws. The reversible rest admits of bringing the work in contact with the edge of wheel at or below the centre, and above the flanges at side. The rest is faced with a ground steel plate, which is reversible, and can be removed when worn.
The Tanite Company make a large variety of grinding machines, and Mr. T. D. Paret, who represents the company in England, should be consulted by buyers as to both wheel and machine before purchases are made. The company’s offices and ware-rooms are at 42, The Temple, Dale-street, Liverpool, and they have just opened an office and ware-room at 9, St. Andrew's-street, Holborn Viaduct, London. A stock of goods is kept in both places. |
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1879 Tanite Co., Model D Grinder
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