Lathe Work, Planer Work, Sharper and Slotter Work, Drilling and Boring, Milling Machines |
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Common terms and phrases
adjusted angle plate arbor axis blades bolt boring bar calipers carriage center hole change gears chuck clamped cone cutting edge cutting speed cylindrical dead center desired diameter end mill face plate fastened feed feed-screw finishing cut flat fraction grinding groove ground headstock held hold horizontal index head index plate index-head spindle jaws lathe centers lathe tool leadscrew length line of motion means method milling cutter milling machine milling-machine moved notch number of teeth number of threads operation ordinary parallel piece pitch planer position pulley radial reamer revolution revolutions per minute revolving rotated screw screw thread setscrew shaft shank shape shown in Fig shows side slide slot spiral spring square standard thread steel stud tailstock taken tap drill threads per inch tion tool block tool post top face true try square turn United States standard vertical vise wheel
Popular passages
Page 59 - The circular pitch is the distance from the center of one tooth to the center of the next tooth, measured along the pitch circle.
Page 32 - It is based on a speed of periphery of the drill of 30 feet per minute for steel, 35 feet per minute for iron, and 60 feet per minute for brass. It will be found advisable to vary the speed given in the table somewhat, according as the material to be drilled is more or less refractory.
Page 20 - The tubes or pipes bb, placed one at the front and the other at the back of the fire-chamber or box A, and the openings or holes c at the sides of said chamber or box.
Page 70 - Then, the depth of the cut for which & the machine is to be set is 2.615 — 2.355 = .26 inch. 55. Setting the Cutter Sidewise. — In setting a cutter sidewise, several cases occur in practice, the most common of which are: the cutter is wider than the work, and the cut is to be taken over the whole surface; the cutting is to be done to a shoulder in a plane at right angles to the axis of rotation of the cutter; and the cutter is to be set centrally to a vertical or horizontal plane passing through...
Page 70 - ... of the feed for the table. The end of the ram L carries two sets of tool clamps, which provide for fastening tools in two different positions at right angles to each other. 26. Setting the Ram. — When adjusting the slotter ram for a given piece of work, the ram should be so adjusted that the edge of the tool will pass by the lower edge of the work, but not touch the platen. To set the ram, it should be let down so that the tool rests on a piece of wood or soft metal on the platen. The machine...
Page 24 - J two-ninths of a revolution (as required in connection with the preceding example) it is first necessary to adjust the crank radially until the latch-pin is opposite a circle having a number of holes exactly divisible by the denominator of the fraction (when reduced to its lowest terms) representing the part of a turn required. As the denominator of the fraction in this case is 9, there is only one circle on this plate that can be used, namely, the 27-hole circle. In case none of the circles have...
Page 67 - T6ff or | inch on the screw being cut. If we move along 6 threads or 1 inch on the leadscrew, we would move 10 threads or 1 inch on the screw being cut. From this it will be seen that in the case of a 6-thread leadscrew cutting 10 threads, the nut may be opened and the carriage moved along, and for every £ inch along the leadscrew the nut may again be closed on the thread and the cutting proceed without damage to the thread; for any other position the nut will not close, or, if it does, the tool...
Page 15 - I ! ! one a right-hand c and one a left-hand d — are bolted on the floor plate of a radial drill, with the jigs in place ready for drilling. All the holes in the two pieces are drilled without moving either piece. The upper surface of the FIG. 17. saddle being uneven, several holes are required on the level e, and others on the level f.
Page 50 - It has a very rigid box bed a, which carries the ram b on top and one or more tables on its side. The ram is mounted on a saddle //, which can be moved along the bed either by hand or by an automatic feed. The line of motion of the saddle is at right angles to the line of motion of the ram; the tool is fed across the work by moving the saddle. The shaper head c is fastened to the end of the ram in the same manner as in a column shaper. Vertical slides m, m, which can be moved along horizontal ways...
Page 32 - A feed of 1 inch in from 95 to 125 revolutions is all that should be required according to the size of the drill. At these speeds it will be necessary to use plenty of oil. or a solution of oil, potash, and water, when drilling steel, wrought, or malleable iron. It...