A handbook on the teeth of gears, their curves, properties, and practical construction (1890)
Grant, George B. (George Barnard), 1849-1917 · Lexington, Mass., Lexington Gear Works · leaf 27
alf of the face is a straight line at an angleof 75 degrees, five-sixths of a right angle, with the pitch line. Draw the outer half of the face of the tooth, one-quarter of its whole length,as a circular arc from a center on the pitch line and with a radius of2.10 inches divided bv the diametral… … INVOLUTE TEETH. INTERCHANGEABLE SET. Example. —A rack, and a pinion of twelve teeth, of two diametral pitch. Pinion. — From the tables we have, after dividing by 2, the face radius 1.35inches, flank radius .42 inches, and clearance .06 inches, The pitch diameteris 6 inches, and the addendum is .5…
Gearing
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