. Canadian forest industries 1897-1899. Lumbering; Forests and forestry; Forest products; Wood-pulp industry; Wood-using industries. 4 THE CAKACA IvUMBKHM-AJS March, 1898 TENSION—WHAT IS IT AND HOW TO OBTAIN IT. Tension in a saw is a preparation of the saw to do a specific work by compensating in advance for certain conditions known to arise during the operation of sawing. During the hardening and tempering processes, according to the thinness of the blade, it runs in various forms of bends and twists ; in band saws it often deviates from a true line flatwise, edges still remaining parallel, b
. Canadian forest industries 1897-1899. Lumbering; Forests and forestry; Forest products; Wood-pulp industry; Wood-using industries. 4 THE CAKACA IvUMBKHM-AJS March, 1898 TENSION—WHAT IS IT AND HOW TO OBTAIN IT. Tension in a saw is a preparation of the saw to do a specific work by compensating in advance for certain conditions known to arise during the operation of sawing. During the hardening and tempering processes, according to the thinness of the blade, it runs in various forms of bends and twists ; in band saws it often deviates from a true line flatwise, edges still remaining parallel, but having run in a serpentine form. It is the work of the expert saw-maker to correct these inequalities arising during the process of manu- facture. The saw is also susceptible to modifica- tions in form arising from its use in the mill, and it is the work of the expert saw filer to correct such inequalities thus arising during use. The tensioning of a band saw ought to be more easily understood and reduced to a system than the tensioning of a circular, for the reason that band saws are, for the most part, run of an even width, with the same relative tension, what- ever the width, while the circular saw varies with different diameters, speeds and conditions of use. In a band saw, by a constant and proper use of the straight edge and tension gauge, the drop may be regulated to a nicety. An able filer, as a result of study and investigation, should arrive at a condition for the fitting of his saws, to suit the particular band mill and the work in hand, that should continue practically uniform. A filer that is able to keep his saws in condition to ac- complish uniform and satisfactory results is en- titled to and may expect good remuneration for his effort, while his employer may likewise ex- pect a proper daily average output. To secure the proper action of the saw teeth, the toothed edge ot the saw should be the short- est or firmest. The tendency of the saw while in operatio
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectforestsandforestry
