How To Remedy Splits In Circular Saws

Three methods.

Drill a small hole in the saw at the bottom of the split.

Drill six holes about ¼ in. in diameter, along the line of the crack, taking cart that one of them falls just inside it; countersink the five outer holes on both sides, and rivet nicely up with hot rivets slightly less in diameter than the holes.

Cut a series of dovetails across the split, and insert therein copper dovetails, which must he riveted tight by hammering on each side. The edges of the holes must he filed to an acute angle from each side of the saw, half the thickness of it, and the copper dovetail pieces must not be quite long enough to fill the hole, but must fit in width exactly, and of course must be well annealed, and considerably thicker than the saw. When riveted, file off level with saw.

Brazing Band Saws

Good brass, rich in copper is generally used. Bring the two ends of the saw close together and fasten, then take a small pan of charcoal, and place it under the ends and direct the flame of a blowpipe on it. As the ends will soon become red-hot sprinkle some powdered borax upon them and add the solder with a piece of iron. The way to make the solder melt; cast in ingot and file away; collect the filings, and put into solution of sal ammoniac in water, and so keep until wanted.

Saw Sharpening

To sharpen the saw, take a triangular file, three-square file it is called, the handle in the right hand, the point of the file between the thumb and forefinger of the left hand, apply it to the front of the first tooth that leans away from the operator. Let the point of the file incline towards the point of the saw, give three or four or more rubs of the file, and the point of the tooth will be sharpened, and the front brought to a sharp edge, and as the file will have passed over the top of the next tooth it also will be filed down, and the point partly sharpened.

Now apply the file to the front of this tooth; it leans towards the operator, so the point of the file must incline towards the handle of the saw. Give, as before, three or four rubs, according to the state of the saw, and the point ot this tooth will also be sharpened, and its front brought to a sharp, cutting edge. Go on in this was alternately, always remembering that when the tooth leans away from the operator the point of the file must incline to the point of the saw, and when the tooth leans towards the operator, then it must incline towards the handle of the saw.

If the saw has been sharpened before, it will be advisable to first run the file along the top of the teeth, to bring them all to a level.