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A saw is a tool used to cut things.
There are many kinds of saw. Some of them are hand tools that work with muscle power, like the saw in the picture. Some saws have other sources of power and can be very powerful, such as a chainsaw that is used to cut down trees.
The work carried out with a saw is usually noisy. Using a saw to cut materials is dangerous because of sharp teeth. Care must be taken not to let sharp edges touch the skin. Parts of the material being cut can fly off the work and become a hazard to breathing, to eyes and to the skin.
Or hand powered saws. These use the motion of a person's arm to make a cut.
Many saws are designed to cut on the push stroke (when the saw is pushed forward).
There are several kinds of mechanically powered saws. Some are powered by electricity from a wall socket. Others are powered by batteries. Still others can be powered by Internal combustion engines, steam, or water power.
A saw designed to cut down trees or cut branches from trees is a chainsaw. A chainsaw is named for the row of teeth attached to a flexible chain. The cut is often very rough and often has splinters.
Circular saws use a round blade, usually between 7 and 10 inches. They are often very powerful and can cut through hard or soft wood. They use interchangeable round blades. The blade can be designed to cut any of a number of kinds of materials from steel, to wood, to masonry.
Jig saws move the blade up and down to cut through materials. The stroke (or up and down movement) is usually less than one inch (25.4 mm). These saws are very good for making curved cuts. Jig saws use a variety of interchangeable blades for cutting different materials. Some blades make very smooth cuts.
- Japanese Architecture and Art Net Users System (JAANUS), Nokogiri; retrieved 2012-4-13.
- Takenaka carpentry tools Museum, Nokogiri; retrieved 2012-4-13.
- Andy Engel, Carpentry Complete: Expert Advice from Start to Finish (Newtown, CT : Taunton Press, 2011), p. 14
- Chris Marshall; Philip Schmidt, A complete guide to basic woodworking: skills & projects every woodworker needs (Chanhassen, MN: Creative Pub. International, 2005), p. 20