Lumber, its manufacture and distribution . m 16 to 18. The speed of the saws is from8000 to 10,000 linear feet per minute. The feed speed varies from 20 to200 linear feet per minute. When electrically driven, a motor having15 to 50 horsepower capacity is required. The power rip saw shownin Fig. 150 weighs 7500 pounds; occupies a floor space 6f feet in widthand 4$ feet in depth; has an extreme height of 9^ feet, diameter of wheels54 inches, and saw width 6 inches. It will resaw 14- by 29-inch timbersand has a minimum feed speed of 20 linear feet and a maximum feedspeed of 160 linear feet per mi
Lumber, its manufacture and distribution . m 16 to 18. The speed of the saws is from8000 to 10,000 linear feet per minute. The feed speed varies from 20 to200 linear feet per minute. When electrically driven, a motor having15 to 50 horsepower capacity is required. The power rip saw shownin Fig. 150 weighs 7500 pounds; occupies a floor space 6f feet in widthand 4$ feet in depth; has an extreme height of 9^ feet, diameter of wheels54 inches, and saw width 6 inches. It will resaw 14- by 29-inch timbersand has a minimum feed speed of 20 linear feet and a maximum feedspeed of 160 linear feet per minute. Re-edgers.—Light power-feed edgers with one or more saws formpart of the planing-mill equipment, and are used to rip stock to secure 256 THE RE-MANUFACTURE OF LUMBER narrower widths or to raise the grade. They differ from the edging machinery in the sawmill in that they only are adapted to light work. Cut-off Saws.—Small swinging cut-off saws, Fig. 151, suspended from above, are installed behind the planing machines for trimming. By permission Wm. B. Mershon & Co. Fig. 150.—A 54-inch Vertical Resaw for Planing Mill Use. stock when the practice is followed of grading and bundling the productas it leaves the machine. The saw is placed at the far end of a narrowtable which is placed at one side of and parallel to the rear of theplaning machine and has markers spaced 1 foot apart. Where the product, as it leaves the machines, is dropped upon anassorting table for grading, a battery of trimmer saws, each saw spaced THE RE-MANUFACTURING PLANT 257 1 foot apart, is placed above the table and all trimming is then doneby one trimmer man. This method is less satisfactory than theinstallation of single saws behind each machine, because the mosteconomical results are not always secured onaccount of the large volume of lumber passingthe trimmer man. Swing cut-off saws have an18-inch saw and, when electrically driven, requirea 3 horsepower motor. When a battery of trim-mer saws is
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Keywords: ., bookcentury1900, bookdecade1920, bookpublishernewyo, bookyear1922
