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 40
anexternal gear. This tends toward smoothness and quietness inrunning, as well as giving a slightly longer contact for eachtooth. Another characteristic which is often an advantage willbe seen from a study of Fig. 9. In each case shown we havegears of the same pitch and number of teeth. The… … jSlachinery Fig. 9. Comparison between External and Internal Spur Gears In contrast with the advantages just mentioned, the chieffactor which has limited the use of the internal gear has beenthe difficulty and expense of making it. This difficulty has notbeen insuperable for cast gearing, but,…
Gearing
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