American Machinists' Handbook and Dictionary of Shop Terms: A Reference Book of Machine Shop and Drawing Room Data, Methods and Definitions

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Hill Publishing Company, 1908 - Machine-shop practice - 513 pages
 

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Page 330 - Government in 1866. The three principal units are the meter, the unit of length, the liter, the unit of capacity, and the gram, the unit of weight. Multiples of these are. obtained by prefixing the Greek words: deka (10), hekto (100) , and kilo (1000). Divisions are obtained by prefixing the i.atiu words: deci d'), centi (гДи)
Page 450 - The module is the pitch diameter in millimeters divided by the number of teeth in the gear. Pin Gear — Gear with teeth formed by pins such as the old lantern pinion. Also formed by short projecting pins or knobs and only used now in some feeding devices. Quill Gears — Gears or pinions cut on a quill or sleeve. Skew Gears — See Helical. Spiral Gears — (Fig.
Page 300 - Key. z, y, x, w, v, u, t, s, r, q, p, o, n, m, 1, k, j, i, h, g, f, e, d, c, b, a.
Page 156 - A, B, C, D, E, F, G, KI, J, K, L, M, N, O, P, 0, R, S, T, U, V, W, X, Y, Z a, b, c, d, e, f, g, h, i...
Page 331 - F. ; the kilogram is the weight of 1 liter of water; the ton is the weight of 1 cubic meter of water.
Page 39 - D is the actual external diameter 71 of the tube throughout its parallel length, and is expressed in inches. Further back, beyond the perfect threads, come two having the same taper at the bottom, but imperfect at the top. The remaining imperfect portion of the screw-thread, furthest back from the extremity of the tube, is not essential in any way to this system of joint ; and its imperfection is simply incidental to the process of cutting the thread at a single operation. From the foregoing it follows...
Page 22 - Thread is an adaptation of the most commonly used style of Worm Thread and is intended to take the place of the square thread. It is a little shallower than the Worm Thread, but the same depth as the square thread and much stronger than the latter. The...
Page 431 - The strip of sheet metal is fed under the stripper and is prevented by that member from lifting with the punch upon the up-stroke, following the punching out of the blank. Where several punches are combined in one hole for blanking as many pieces simultaneously, they are known as multiple blanking tools.
Page 27 - Thus, by measuring one-half of the depth of the thread from the top on each side, the diameter of the thread, as indicated by the caliper, or the pitch diameter, is the full size of the thread less the depth of one thread, as follows : — This depth may be found Depth of Whitworth standard threads = 0-64 -*- number of threads to I inch.
Page 426 - Sharpe system of involute gear cutters, eight cutters are regularly made for each pitch, as follows: No. 1 will cut wheels from 135 teeth to a rack. No.

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