Material handling cyclopedia; a reference book covering definitions, descriptions, illustrations and methods of use of material handling machines employed in industry (1921)
Wright, Roydon Vincent, 1876- ed, Little, John G., joint ed, Augur, Robert C., joint ed · New York, N.Y., Simmons-Boardman Publishing Co · leaf 459
Figs. 80 and 81 spur gears are in general use, while for excessively highreductions, the planetary gear reducer or a combination FLIGHTS 453 of worm and spur gears will usually give better resultsthan a single worm drive. The worm is generally made of steel and the wheel ofeither cast iron or…
Hoisting machinery · Conveying machinery
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