Fig 73 Filing Down The Rakers

Filing Down the Rakers

The next step after the saw is jointed, that is, when all the teeth have been filed down to t\\e level of the lowest tooth, is to file down the rakers. This operation is shown in Figure 73. The crosscut-sawr tool is placed on the saw so that the points of a raker project up through the slot in the tool, and the part of the raker points that stick up through the slot are then filed off. Soft wood requires more clearance for the rakers than hard wood. For cutting hard wood, the rakers are filed down from 1/64 to 1/40 in. shorter than the cutting teeth. For soft wood, from 1/40 to 1/32 in. is satisfactory.

When the rakers have been filed, down to the right distance below the cutting teeth, they must be filed to a point. The filing is done on the inside of the notch on the end of the raker, straight across the saw. A flat file is most satisfactory for this work. Each raker should be filed so as to have a square corner at the center, as shown at C, Figure 71. It is good practice to file every other raker from one side of the saw and the rest from the other side. Inaccuracies of angle will then appear equally on both sides and cause the saw to run true, which it would not do if all the filing were done on one side.

Filing the Teeth

The next step in fitting the saw is that of filing the teeth. This operation is shown in Figure 74. Every other tooth is filed from one side. The position to hold the file depends on the shape and on the length of the point desired. If the saw is to be used in frozen timber containing numerous knots, so that strength is required

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