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 165
explainingthe methods used in the design of hobs for spur gears, it is bestto assume a practical example. Suppose that the gears are tobe cast iron, with 120 teeth, 16 diametral pitch and f inch widthof face. The pitch diameter, hence, is 7J inches. The holein the hob for the spindle is to be i^… … 0.010 RAO. liH DEG. Machinery Fig. 12. Standard Hob Tooth Dimensions Form and Dimensions of Tooth. — The first thing to be settledis the form and dimensions of the tooth or thread section of thehob. If the form is to be the standard shape for the involutesystem with a i4|-degree pressure angle, the…
Gearing
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