American machinists' handbook and dictionary of shop terms : a reference book of machine shop and drawing room data, methods and definitions (1914)
Colvin, Fred H. (Fred Herbert), 1867-1965, Stanley, Frank A. (Frank Arthur), b. 1874 · New York : McGraw-Hill book company ; London : Hill · leaf 122
GEARS—TEETH AND PARTS ^ t<^ CireuJar … I I 1- * Measured on tho Ktch Circle Fig. I. —Part of Gear Teeth Addendum. — Length from pitch line to outside. Chordal Pitch. — Distance from center to center of teeth in astraight line. Circular Pitch. — Distance from center to center of teeth meas-ured on the pitch circle. Clearance. — Extra…
Machine-shop practice
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