Circular saw blades are the circular shaped cutting implements used with miter saws, table saws, radial arm saws, cut-off saws and standard circular saws. Most of these can be used interchangeably, but in order to improve the job performance and efficiency, it is recommended to use the right blade for each type of work. Manufacturers often suggest information, such as type of saws, materials and/or applications each one is designed for, giving you a variety of options to consider, for each type of circular saw. Before thinking of buying a circular saw blade, you need to consider the following features:
- Teeth, Dimensions and Construction: Circular saw blades vary widely in price. More expensive blades usually have features that extend the longevity of the blade while enhancing performance. Inexpensive blades may dull quickly or produce rougher cuts, so make sure you weigh the benefits of each blade in addition to the initial cost.
- Dimensions: When buying circular saw blades, you need to keep three aspects in mind: diameter, arbor size and kerf. The first two dimensions, diameter and arbor size are determined by the saw. Blade diameters start at 3-3/8", but the most commonly used is 7-1/4". Arbor sizes range from 1/2" to 1". Kerf, tells you how thick or thin a given blade is. Thick-kerf blades last longer and can be resharpened, so they tend to be more expensive.
- Teeth: Mostly, blades with more teeth yield a cleaner cut, and blades with fewer teeth deliver faster cuts with rougher edges. The number of teeth should correspond to the diameter of the blade. Tooth grind, shape and hook are also very important in determining the longevity of the blade, quality of cut and recommended applications.
- Construction: Circular saw blades are usually constructed of steel or carbide-tipped steel. Steel blades are inexpensive but their teeth can dull quickly, so they're often used for more occasional use. Carbide-tipped blades, on the other hand, are extremely durable, with long life often featuring higher price tag.
- Applications: Manufacturers often tell you which saws, materials and/or cuts each of their blades is designed for, not going for guesswork. The recommended applications are usually printed right on the blade for easy identification even after the packaging has been removed.
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