Cyclopedia of mechanical engineering; a general reference work. Editor-in-chief Howard Monroe Raymond. Assisted by a corps of mechanical engineers, technical experts, and designers of the highest professional standing (1908)
American School (Chicago, Ill.), Raymond, Howard Monroe · Chicago American Technical Society · leaf 236
dent that the diameter of the gear should be at least as largeas the drum iu order to keep the tooth load down to a reasonablefigure. On the other hand, if made too large, it spreads out themachine and destroys its compactness. As a diameter of 36inches is not excessive, let us assume this, and see… … on the tooth must not only impart a pull of 5,000 pounds to therope, but must overcome friction between the gwar teeth in action,also between the drum shaft and its bearings. Assuming theefficiency between the rope and tooth load to be 95 per cent, the net load, therefore, which the tooth must take…
Mechanical engineering
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