Modern Blacksmithing Rational Horse Shoeing and Wagon Making
with rules, tables, recipes, etc., useful to manufactures, blacksmiths, machinists, well-drillers, engineers, liverymen, horse-shoers, farmers, wagon-makers, mechanics, amateurs and all others who have occasion to perform the work for which this book is primarily intended. by J.G. Homstrom 1901
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How to Repair Cracked Circular Saw Blades - How to Prevent a Circular Saw Blade from Cracking - How to Sew a Belt
HOW TO REPAIR A CRACKED CIRCULAR SAW
If a circular saw is cracked it can be repaired so that the crack will go no further, and if the crack is deep, it can -be so remedied that there will be no danger in using it. Ascertain the end of the crack, then drill a 3/16 inch hole so that the crack will end in that hole. Countersink 011 each side and put in a rivet. Don't let the rivet stick its head over the face of the saw. If the crack is deep put another rivet about half an inch from the edge. If the saw is too hard to drill, heat two irons about 1 1/4 square or round, square up the ends and set the saw between the ends so that they will meet over the place where the hole is to be drilled. When the saw is dark blue, the temper is out. It might be a possibility that this will spring the saw in some cases, therefore, I advise you to try drilling the hole without any change in temper. Prepare a drill that is harder than usual, use no oil, but water.
HOW TO PREVENT A CIRCULAR SAW FROM CRACKING
The reason why a circular saw cracks is, in most cases, incorrect filing. In filing a saw, never let a flat file with its square corners touch the bottom of the teeth you are filing; if you do, you will make a short cut that will start the crack. The best way is to gum the saw in a saw gummer or on an emery wheel, or use a round edged file.
HOW TO SEW A BELT
Belts can be riveted, sewed, or hooked together. A new leather belt should not be riveted, because such a belt will stretch and have to be cut out and sewed over quite often at first. There are hooks made of steel for belt sewing, these are all right when the pulleys are not less than six inches in diameter and the speed is slow. In using these hooks be careful not to bend them too sharp or drive the bends together too hard; in so doing they will cut through the leather and pull out. Lacing is the best for all kinds of belts.
In sewing a belt with lacing, first punch with a punch made for this purpose, holes in proportion to the width. Don't punch them too close to the ends. Begin sewing in the center holes and start so that both ends of the lacing will come out on the outside of the belt. Now sew with one end to each side, and be careful not to cross the lacing on the side next to the pulleys. The lacing should be straight on that side. When the belt is sewed punch a small hole a little up in the belt to receive the last end of the lacing; the last end should come out on the outside of the belt. In this end cut a little notch about three-fourths through the lacing close to the belt, and then cut the lacing off a quarter of an inch outside of this notch. This notch will act as a prong and prevent the lacing from pulling out. Tap it lightly with a hammer above the seam to smooth it down.
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