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 34
diameters, and from their intersection draw a conical line tothe center. Measure the center angle between either shaft and the conical line, and theproper increments will be found in the table at that center angle. If thecenter angle is less than 45°, the tabular angle increment must be dividedby… … 94 anale increment 1.63and the diameter increment = .20 1.43 X 40 Proceed separately with theOther gear of the pair by measuring and usingits center angle. ERRORS IN DIAMETER. It will often happen that the outside diameter vtdll be turned too small, orthat a casting will not quite turn to the…
Gearing
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