Always support the wood so that the waste piece falls away from the cut, opening the kerf rather than closing it.
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A circular saw is one of the most common tools in any shop, but it is also one of the most unforgiving. Kickback happens when the blade suddenly binds or pinches in the wood, causing the saw to be violently propelled backward toward the operator. It occurs in less than —faster than human reaction time. The Mechanics of the Accident Always support the wood so that the waste
Hitting a hard density change that stops the blade's momentum instantly. Kickback happens when the blade suddenly binds or
When a spinning blade (rotating at upwards of 5,000 RPM) gets stuck, that rotational energy has to go somewhere. Since the blade can no longer cut through the wood, the saw climbs out of the "kerf" (the cut slot) and launches itself. Because of the blade's rotation direction, the tool naturally kicks , often directly toward the user’s hand, thigh, or torso. Graphic Reality: What Happens to the Body
Ensure your saw has a riving knife (a metal splitter behind the blade) to keep the wood from pinching.