Variety of Circular Saws From Tools Today.com
There are several advantages of cutting with a circular system then in a single plain. The circular movement has centrifugal forces which allows for faster speeds. Tabitha noticed the back and forth motion was wasted on the return sawing because the teeth of the saw was pointing towards the initial push. A block of wood allows cuts with less effort by starting small and working to bigger pieces (A Plus). Without all the math involved in physics, Tabitha Babbitt was able to create a more effective way of sawing a board by simple observation.
Today, we have circular saws for personal use with hand held circular saw (aka skill saw) and table chop saws to industrial saw mills and fine cabinet makers (Gravin, 2002). The circular saw progressed to personal use by the means of creating a level surface and putting a driven motor either driven by man, horse, or hydropower power, or eventually electricity would be the ‘work horse’ to drive the blade. The personal use created garage hobbies, woodworkers, cabinet makers, carpenters, and the list goes on and on (see image three, four, five, and six). The very shape of the circular saw changed to have different shaped and sized teeth to accommodate the users design for the wood (see image one and two). The saw can be as small as a Dremel hand held tool, portable like a battery operated chop saw, or as in the last image, large enough to cut full sheet of material with the case of a radial arm saw (McInnis). These modern tools have taken wood working from the factory and into a malleable product which the everyday user could create limitless possibilities.
There are even circular saws to cut metal, acrylic, tile, plastic, concrete, and stone (See first image). Some blades are created with relief wholes inside the wheel of the blade to lessen the pull of the blade along the material and reduce heat caused by the high rotations per minute and frictional forces. Multiple blades have been combined to create a wide indented area without cutting through the board which is called a Dado cut created by an adjustable dado saw blade. Diamond crystals have been incorporated with the teeth of the blade to be able to cut objects which are harder than iron like granite, marble, and concrete. Most of the time water coolant can be incorporated to prevent over heating of the material during cutting. Carbide tipped blades prevent premature dulling of the blade while cutting large amounts of material (Tools Today, 2015). From the humble start of cutting wood, the circular saw has allowed the human race to mold any material fashioned however we please. The smallest diamond to the lustrous granite countertops and the wood to hardest metal has created a craft which has shaped our world in art to tall skyscrapers.
