Woodwork for secondary schools; a text-book for high schools and colleges, prevocational and elementary industrial schools (1916)
Griffith, Ira Samuel, 1874-1924 · Peoria, Ill., Manual Arts Press · leaf 150
. Where arc of contact is not 180°. Working tension or effective pull=:Arc of contact x 55 forsingle, 88 for double, and 110 for three-ply belts, product -^180. Arc of contact on smaller pulley may be found by stretchingtape over the pulleys and then estimating the number ofdegrees contact by means… … Fig. 228. Determining ArcOF Contact. Fig. 230 shows some of the more common drives andthe relative positions of the pulleys to secure results. Occasionally it is desired to know the length of beltingin a roll. This can be found by adding the diameter ofthe hole in the center tothe outside diameter…
Woodwork (Manual training)
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