This historic book may have numerous typos and missing text. Purchasers can usually download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1910 edition. Excerpt: ...to avoid interference of the points of the teeth with the radial flanks of small gears. Interference in Involute Gears.--The points c and d, Fig. 159, where the line of action is tangent to the base circles, are called the limiting points. If the involutes which spring from either base cir Fig. l66. ...
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This historic book may have numerous typos and missing text. Purchasers can usually download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1910 edition. Excerpt: ...to avoid interference of the points of the teeth with the radial flanks of small gears. Interference in Involute Gears.--The points c and d, Fig. 159, where the line of action is tangent to the base circles, are called the limiting points. If the involutes which spring from either base cir Fig. l66.-Obtaining a 15-the radial flank of the ence will occur sooner as the line of action is made to cross the line of centers at a less oblique angle, as in standard gears, and still earlier as the pitch circle 6 is made larger. In gearing of standard proportions, a gear of 30 teeth is the smallest that will work correctly with a straight toothed rack. In the gears shown in Fig. 163, the teeth of the large gear pass beyond the limiting point of the small gear, and hence, if made of true involute shape, or 75-degree Angle by 30-and 45-degree Triangles. mating tooth. This is, of course, a highly exaggerated case. The interfertheir extremities will not work properly with the flanks of the small gear. There are three methods available to overcome this interference. First, to hollow out the flanks of the teeth of the small gear. Second, to round off the points of the teeth of the large gear. This is the method usually adopted, in interchangeable gears, the point being rounded off enough to clear the flanks of the smallest gear of the set. Fig. 165 shows the teeth of the rack so corrected in larger scale. Third, to cut off that part of the tooth in the large gear which extends beyond the limiting point of the small gear. This is done in special cases. The Two Systems Compared.--The great point in favor of epicycloidal gearing would appear to be in its freedom from interference. It is necessary, however, in order to have epicycloidal gears run well, to...
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PLEASE NOTE, WE DO NOT SHIP TO DENMARK. New Book. Shipped from UK in 4 to 14 days. Established seller since 2000. Please note we cannot offer an expedited shipping service from the UK.
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PLEASE NOTE, WE DO NOT SHIP TO DENMARK. New Book. Shipped from UK in 4 to 14 days. Established seller since 2000. Please note we cannot offer an expedited shipping service from the UK.
