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What size blade does your saw require?
Most table saws use 10″ blades, but some take smaller blades, and some take larger. Though not generally recommended, you can use a smaller blade than your saw is designed to handle (with the obvious loss in depth of cut). Never try to use a larger blade.
What kind of cuts will the blade need to make?
Primarily rip cuts (with the grain) or crosscuts (across the grain)? Because it’s easier to remove material with the grain, ripping blades typically have fewer teeth, and they’re set at a more aggressive hook angle and separated by larger gullets to cut and clear wood chips as quickly as possible. The teeth themselves are flat-topped or shaped with triple-chip-grind geometry, both of which are well-suited to cutting with the grain. Because it’s harder to get a clean edge when cutting across the grain, crosscut blades have more teeth, which generally are set at a slightly less aggressive hook angle and feature a knife-like alternating-top-bevel geometry that allows them to slice across the wood’s fibers. If you’re working in a shop with table saws dedicated to each type of cutting operation (or if you don’t mind switching out blades on a single saw), specialized blades might be the right choice for you.
But if you need the blade to handle both types of cut with more or less equal frequency and you don’t
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