Spur and bevel gearing; a treatise on the principles, dimensions, calculation, design and strength of spur and bevel gearing, together with chapters on special tooth forms and methods of cutting gear teeth (1914)
New York, The Industrial press; [etc., etc.] · leaf 224
, sm 7 -f cos 7 RULES AND FORMULAS 209 Formula (29) is derived by the same process for the other gear.Formulas (31) and (33) are derived from Fig. 14, using the fol-lowing fundamental equation: e _ ^ ^ tan a-p sin (180° — 7) tan (180° — 7) When solved for tan a^^ this gives Formula (31). Rule (32),… … Machinery Fig. 15. Diagram for Obtaining Pitch Cone Angle of Pinion to Mesh with Crown Gear . . . D , . Since m a crown gear the dimension —■ in Fig. 12 is to be 2 measured parallel to the axis, and will therefore be of infinitelength, the form of the teeth will correspond to those of a spurgear…
Gearing
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