Cutting tables
Introduction
A table saw (also known as bench saw) is a woodworking tool. It consists of a circular saw blade mounted on a shaft that is driven by an electric motor (either directly, by belt or by gears). The blade protrudes through the top of a table, providing support for the material being cut, usually wood.
In most modern table saws the depth of cut varies by moving the blade up and down: the further the blade protrudes above the table the deeper the cut is made in the material. In some early table saws, the blade and spindle were fixed, and the table moved up and down to adjust how far the blade protruded. The cutting angle is controlled by adjusting the blade angle.
History
In the United States, the first registered patent for the circular saw was issued in 1777 to an Englishman, Samuel Miller; refers to a circular saw that was created in Holland in the 16th or 17th centuries.[1] The 1885 catalog of WF & John Barnes Co., Rockford, Il. It clearly shows a classic table saw and is labeled as a "Powered Hand Circular Saw".
Security
Contenido
Las sierras de mesa son especialmente peligrosas porque el operador sujeta el material que se está cortando, lo que facilita el movimiento accidental de las manos hacia la cuchilla giratoria. Cuando se utilizan otros tipos de sierras circulares, el material permanece estacionario, ya que el operador guía la sierra hacia el material.[2].
Kickback
Kickback is the effect that occurs when a piece of wood tears and pinches the blade, or spins outward against the rotating saw blade and is propelled toward the operator at high speed. The two main causes of injuries that occur from kickback are: injuries caused by wood hitting the operator's head, chest or torso, or the wood moving so fast that the operator's hands remain in the wood and encounter the saw blade.