Horizontal Band Saw - 5: Cutting Action of the Blade
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WARNING: Machine tools present a safety hazard. Improper operation can result in severe injury. These topics are for non-laboratory study only and are not to be used in conjunction with the operation of any tool or machine described herein. Never use a machine tool without the supervision of a qualified instructor.
Some blades are designed for light duty while others are designed for heavier work. This design may show up in saw blade teeth with a strange look to them. Some of the teeth may appear to be straight, while alternating teeth may be slanted to the right or left. This increases the cutting action and longevity of the blade.

Similar to end mill action, the cutting edge of the blade comes in contact with the metal, and actually rips material away. Of course, this is on a microscopic level. Each blade tooth removes a small amount, and the next tooth will continue in the cutting action.

Saw blades will wear out, just as any other cutting tool. Examining the blade is critical before beginning any major cutting job. Signs of wear include shiny spots in the otherwise dark metal of the blade. The edge of the tooth will be rounded, and there may be broken teeth as well.

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