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Anti-kickback pawls: Most modern US table saws are fitted with kickback pawls, a set of small spring-loaded metal teeth on a free-swinging pawl (usually attached to the guard) which help to put a strong downward force on a board. This can help to immobilize the board in the event of a kickback.
A splitter is a stationary blade of similar thickness to the rotating saw blade mounted behind it to prevent a board from pinching inward into the saw kerf and binding on the saw blade, potentially causing a dangerous kickback. [7] Like a riving knife, its thickness should be greater than the body of the saw blade but thinner than its kerf. [7]
Dogs (in the form of pawls) are used on extension ladders to temporarily anchor their sections to one-another. [3] Table saw Pawls are used on table saws to prevent a workpiece being sawn from kicking back. [4] Transmission A parking pawl is a device in an automobile automatic transmission which prevents it from moving when the vehicle is ...
Typical table saws incorporate a riving knife, a spreader which helps prevent the cut from closing on the back of the saw blade. Natural tension can exist in wood that causes the cut to close. Some blade guards have anti-kickback devices that allow only forward travel past the blade called anti-kickback pawls. Push the workpiece past the blade.
The rack and pawl are both restricted to only linear movement (not shown). A ratchet (occasionally spelled rachet) is a mechanical device that allows continuous linear or rotary motion in only one direction while preventing motion in the opposite direction. Ratchets are widely used in machinery and tools.
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