. Canadian forest industries 1886-1888. Lumbering; Forests and forestry; Forest products; Wood-pulp industry; Wood-using industries. £J||||||||| IMI IIIIIIIIIIIIIIHIIIIIIIinilllillllllllllllllllllllliilllMllllllillllllllllllllllllllllllllillllllllllllllllllllllll^ 1 BEST BELT SURFACE, LIGHTEST, STRONGEST, § | BEST BALANCED AND MOST CONVENIENT | PULLEY IN THE WOULD. illlllllllllllllllllllllll Illlllllllll Illllllllllllllllllllllllllllllll IIIIIHIIIIIIIIIIIIIIIIIIIIIIIIIIIIUIIIIIIIIIIIIIIIIIR With our Patent Bushing System Every pulley will fit 22 different sizes of shafting, and guaranteed to
. Canadian forest industries 1886-1888. Lumbering; Forests and forestry; Forest products; Wood-pulp industry; Wood-using industries. £J||||||||| IMI IIIIIIIIIIIIIIHIIIIIIIinilllillllllllllllllllllllliilllMllllllillllllllllllllllllllllllllillllllllllllllllllllllll^ 1 BEST BELT SURFACE, LIGHTEST, STRONGEST, § | BEST BALANCED AND MOST CONVENIENT | PULLEY IN THE WOULD. illlllllllllllllllllllllll Illlllllllll Illllllllllllllllllllllllllllllll IIIIIHIIIIIIIIIIIIIIIIIIIIIIIIIIIIUIIIIIIIIIIIIIIIIIR With our Patent Bushing System Every pulley will fit 22 different sizes of shafting, and guaranteed to give from to 60 per cent, more power from same belt and like tension than any iron or steel pulley. Every pulley a split pulley, 70 per cent, lighter than cast iron and 50 per cent, lighter than wrought iron or steel. Strong enough for any power required. Made in any size from nine inches to sixteen feet As a material for pulleys wood is better than iron from the fact that it holds a belt much better. Most good mechanics are aware of this fact, but it may not be generally known how great is the difference, and for the benefit of our readers we give the result of twj tests made and'published by two of the most eminent mechanical authorities :â1 Portion of Cir- cumference em- braced by Belt. Rel. value of leather belt Portion of Cir- cumference em- braced by Belt. Rel. value of leather belt On Wooden Pulleys. On Iron Pulltys. On Wooden Pulleys. On Iron Pulleys. .20 â¢3° .40 â So .60 .70 2-43 3-43 .20 â¢30 .40 â 50 .60 â 70 , 3-30 3-40 Morin.âAppleton's Encylopedia of Mechanical Arts. Haswell.âEngineers' and Mech- anics' Pocket Book. fact that it can be made very much lighter and thus save weight on the line shaft and bearings, thereby saving in ex- pense from a saving in friction. The advantages of the separable pulley are very apparent. By its use
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectforestsandforestry
