What Do Saws Do?


  

A saw is a piece of hardened steel with teeth cut into one edge and a wooden or plastic handle. In some form or other, saws have been one of the major woodcutting tools for thousands of years. The different kinds of saw for different jobs can unevenly be divided into three key groups:

Rip saws - they are used for cutting along the grain of wood

Cross-cut saws - used for cutting across the grain of wood

Pruning saws - used for cutting curves or special shapes, such as fret saws and bow saws.

Saws vary in the size and shape of the blade, and the size, shape and number of teeth they have. Rip teeth, which are designed for cutting down the grain of wood, work like small chisels. The front edge of each tooth is more or less perpendicular to the saw edge and the back edge slopes at about 30 degrees. If saws with teeth like this are used to cut across wood grain, they tend to tear the fibers and leave a jagged edge. Rip teeth are commonly straight-sharpened the tip of each tooth is perpendicular to the cutting line. Cross-cut teeth, which are intended for cutting across wood grain, usually slope back rather more and are generally cross-sharpened the teeth are sharpened at an angle to the saw so that the outside edge of each tooth is pointed. Cross-cut teeth tend to cut through the wood fibers rather like a knife. Fleam teeth slope back even more than cross-cut ones and have proportioned points. They cut similarly well on the push and pull strokes. For more info about saw, visit http://uncyclopedia.wikia.com/wiki/Chainsaw .

These saw teeth are generally set teeth are bent slightly outwards from the blade, alternately in each direction, so that the width of the slot cut by the saw is greater than the width of the blade. This avoids the saw jamming in the slot when cutting and lets you change the direction of the cut slightly during sawing. An even set is essential: severely set saws tend to wander.

For years, saw blades have been made from hardened steel which has been hardened to reduce the hardness (and increase the durability) so that the blade wears well but is still soft enough to be sharpened with a file. More recently, nevertheless, saws have been presented which have 'hard point' teeth the tips of the teeth are hardened to decrease wear, visit website here!