Pitch, or number of teeth per inch, is a significant variable in cutting tubing because the number of teeth in contact with the workpiece determines both blade performance and durability. Since there is no such thing as a magic blade, blade variables and band saw settings have to be selected to provide the best overall performance for sawing tube and pipe. The cut, the blade would change back again to a coarse pitch, aggressively configured blade. As the blade cut through the walls, it would magically change to a neutral rake blade with more teeth and shallower gullets. If there were such a product as a "magic blade" for tube and pipe, it would start cutting aggressively with a coarse pitch (fewer number of teeth per inch), have deep gullets to carry away chips, and have a positive rake to help the blade penetrate the solid. After the blade penetrates the inner wall of the hollow workpiece, it is cutting two thin solids with a space between them (called an interrupted cut). As it enters the workpiece, it is cutting a solid. Workpiece geometry can make sawing tube and pipe more difficult than sawing solid bars or plate because the saw blade is performing two types of cuts. With a band saw, however, the choice of which blade to use is very important in maintaining a low cost per cut. Band saws use a thinner blade than do cold saws, so they minimize kerf loss, and their design is conducive to nesting or stacking stock for simultaneous sawing of many pieces. Production quantities of cut tube and pipe can be produced economically with a band saw.
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