A table saw or sawbench is a woodworking tool consisting of a circular saw blade, mounted on an arbor, that is driven by an electric motor (either directly, by belt, or by gears). The blade protrudes through the surface of a table, which provides support for the material, usually wood, being cut.
In a modern table saw, the depth of the cut is varied by moving the blade up and down: The higher the blade protrudes above the table, the deeper the cut that is made in the material. In some early table saws, the blade and arbor were fixed, and the table was moved up and down to expose more or less of the blade. The angle of cut is controlled by adjusting the angle of blade. Some earlier saws angled the table to control the cut angle.
As far as table saw technology goes, there is a table saw that automatically stops in less than 1/1000th of a second when it comes in contact with flesh, and the inventor was crazy enough to test it with his finger!
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