Are Power Tools Necessary ?
. KINDS OF BLADES: There are different blades for different kinds of work just as there are in hand saws. Each is useful for its particular job. The crosscut blade is used for cutting across the grain of the wood, for mitering, and for finished work. Ripsaw blades are used for quick cutting with the grain of the wood. Combination blades which join the good qualities of both rip and crosscut teeth are good all-around blades to use for general work, although they will not cut as quickly as a ripsaw nor as finely as a crosscut blade. Flat-ground blades, usually found in saw blades of lower prices, are perfectly useful and desirable; but hollow-ground blades will give a much finer, smoother cut, although sawing may take a trifle longer.

Special blades: A plywood blade is made for cutting plywood with a minimum of splintering. Nail-cutting blades which rip through old lumber and slice through nails and other metal where encountered are distinctly useful special purpose blades.

Carbide-tipped saw blades are long-lasting and extremely tough, although more expensive than other blades. Usually, however, they more than pay for themselves by lasting better than several ordinary blades. Each tooth is faced with carbide which is set to extend a tiny fraction of an inch above the non-cutting steel part of the blade. These blades will cut through almost anything except masonry, stone, concrete, steel, or other hard metals. They are splendid for cutting plastics, Formica, laminates, plywood, wallboard, asphalt roofing or siding, Transite, asbestos, aluminum, and insulating boards. In addition, they will make any kind of cut on wood-crosscut, rip, bevel, or miter.

One function of the bench saw, which it performs very well indeed, is the groove cut called a "dado." (A Groove Cut, when the term is used properly, describes a furrow cut with the grain of the wood; a Dado Cut on the other hand is a furrow cut across the grain of the wood.) A special cutter, called a "dado head," a "dado assembly," or sometimes just a "dado," is mounted on the saw shaft to replace the usual blade. It can be adjusted to the width of furrow desired, and either a groove cut or a dado cut can be made with it. There are two types of dado heads. One is a single blade of heavy steel with an adjustable hub which can be set to tilt the blade and make it waggle as it spins. According to the tilt of the blade, the dado will be wider or narrower in the final cut.




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