A handbook on the teeth of gears, their curves, properties, and practical construction (1887)
Grant, George B. (George Barnard), 1849-1917 · [Boston] · leaf 22
e center c.The table, page 22, is for one diametral pitch, and covers the common twelve to rack interchangeable set. Interference must be corrected, when necessary, as explained below in detail. INTERFERENCE. As indicated above, the involute face will interfere with the radial flankof the mating… … THE NEW METHO 19 Figure 20 shows the interference, its effect, and its correction. The working face of the involuteshould be limited at i by the circlek p through the tangent point e, butif the usual addendum continues itbeyond that line, to s, the extensions i will interfere with the radial tlankc…
Gearing
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