. Canadian forest industries 1901-1902. Lumbering; Forests and forestry; Forest products; Wood-pulp industry; Wood-using industries. The 14-gauge used to do about half the work that people now expect the ordinary filer to accomplish with the 18- gauge. Surely there is not more backbone to the 18-gauge than to the 14, but to overcome it they speed the thin saw much higher, which means more care, more ham- mering and more tension, and this requires steadier motion and exactness of machine work. The arbor should be turned true and well balanced. I like to have a shingle saw collar turned true fro
. Canadian forest industries 1901-1902. Lumbering; Forests and forestry; Forest products; Wood-pulp industry; Wood-using industries. The 14-gauge used to do about half the work that people now expect the ordinary filer to accomplish with the 18- gauge. Surely there is not more backbone to the 18-gauge than to the 14, but to overcome it they speed the thin saw much higher, which means more care, more ham- mering and more tension, and this requires steadier motion and exactness of machine work. The arbor should be turned true and well balanced. I like to have a shingle saw collar turned true from rim to center. Some order them low at the center, but experi- ence leaches me to have them true and alike. I have used paper between the saw and collar, to level it, which is a help where the machine shop is not handy. Some claim that by having the collar low at the center it helps to keep the saw from running out of the block, but a saw properly hammered will go to a straight line if properly ' dressed. A few days ago I was called upon to hammer two 44- inch 17-gauge saws which had 24-inch collars. These saws were of excellent temper and steel, also well ground. They had been sent back to the factory, but would not work. I tested them, also the collars. One collar was high at the center, so I made a ring of paper and placed it around the outer edge of the collar, which levelled it all right. Then I tested the saws. The tension was very good at a point about two-thirds the distance from center to rim, but the center was very fast or tight, which would not permit the saw to cut straight ; it would not. make even cuts, no matter what the speed might be. I hammered this saw until it showed even tension from rim to center, or, in other words, from rim to rim. I then hammered the other one, leaving them both alike as near as possible. You could not tell one from the other by the way they run, and both went to our entire satisfaction, not even trembling at extreme run, and would do
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectforests, bookyear1902
