A shorter course in woodworking; a practical manual for home and school . nger of the left hand (Fig. 371).Push the file across with an even, straight stroke, without any rockingmotion. Press only on the forward stroke and lift the tool on the back stroke. File from thehandle toward thepoint, filing only theteeth which bendaway (i. e., everyalternate tooth), andcarefully keeping thefile at the properangle. Press only onthe tooth being filed,but keep the filelightly touching the^^- 371 adjacent tooth, and make allowance forthe fact that when the alternate set is filed the file will take off a l
A shorter course in woodworking; a practical manual for home and school . nger of the left hand (Fig. 371).Push the file across with an even, straight stroke, without any rockingmotion. Press only on the forward stroke and lift the tool on the back stroke. File from thehandle toward thepoint, filing only theteeth which bendaway (i. e., everyalternate tooth), andcarefully keeping thefile at the properangle. Press only onthe tooth being filed,but keep the filelightly touching the^^- 371 adjacent tooth, and make allowance forthe fact that when the alternate set is filed the file will take off a littlefrom the first set of teeth. Thus care must be taken not to file toomuch. Then turn the saw around and file the other teeth. On look-ing lengthways along the edge of a cross-cutting or panel saw thathas been properly set and filed, an angular groove will be seen alongthe whole length, in which a needle will slide from one end of thesaw to the other. After setting and filing, lay the saw on a straightboard and joint the sides of the points of the teeth by running a. 138 A Shorter Course in Woodworking smooth file along the sides of the teeth. Thus the width will be moreuniform and the cutting smoother. The ripping-saw is usually filed square across at right angles to theblade (Fig. 73), but sometimes when a saw with fine teeth is used for veryhard cross-grained wood, a slight bevel is given the teeth in filing. A sawwith a very thin back, to be used without setting, is good for ripping verydry stock. For soft, loose-fibred, and wet wood more set and larger teeth areneeded than for dry hard wood, because the fibres, which are quite cleanlycut or broken in the hard wood, in the more yielding soft wood are bentaside by the teeth to close in upon the blade with considerable bindingforce. Less set is required for fine work than for coarse. Power-saws.—The principle and the process of setting and filing cir-cular-saws, band-saws, and jig-saws is the same as with hand-saws. The
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