Stone And Water

If the crosscut saw is rusty, it should be cleaned with pumice stone and water, as shown in Figure 65.

Before one can sharpen a timber saw satisfactorily, he must have in mind the desired shape of the teeth he is filing, so as to get them the same shape as made at the factory, or some other shape definitely suited to the kind of work the saw will be required to do.

The work done by the cutting teeth and the rakers of a timber saw is shown in Figure 66, which shows four cutting teeth between two rakers, or drag teeth. Two of the teeth, A and B, are filed so that the points of the teeth make a cut like a knife cut at the right side of the saw kerf, and the other two, C and D, at the left. Each raker has two square points like a wood chisel. One point draws the sawdust out in one direction, and the other in the opposite direction.

Three styles of teeth, filed for general use, are shown in Fig

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