Benjamin, Charles Henry, 1856- [from old catalog], Hoffman, James David, 1868- [from old catalog] joint author · New York, H. Holt and company · leaf 232
t these points did more harm than good.A wooden pulley with solid rim and web remained intact at4450 revolutions per minute, or 467 ft. per second, a higher speedthan that of any cast-iron pulley tried. 105. Rims of Cast-iron Gears.—A toothed wheel will burst ata less speed than a pulley because… … Scu o w H•I l-H o •-5 o H CM O 6 214 MACHINE DESIGN will be increased nearly in the ratio that the weight of rim andteeth is greater than the weight of rim alone. This ratio in ordinary gearing varies from 1.5 to 1.7. We willassume 1.6 as an average value. Neglecting bending we nowhave from…
Machine design
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