A pawl is a small metal hook or lever that drops into a notch to stop a wheel, gear, or ratchet from moving backward. It acts like a one-way gate, letting motion go forward but locking it if it tries to reverse.
You meet pawls every day without noticing: the click you hear when you turn a socket wrench, the gentle buzz as you reel in a fishing line, or the quiet catch that keeps your seat-belt tight after you pull it. They sit inside bike freewheels, hand-crank winches, and old grandfather clocks, quietly making sure things only go the intended direction.
Meaning & Usage Examples
• Ratchet screwdriver: A pawl inside clicks to let you twist right and tighten, then holds while you reset your grip.
• Watch winding crown: Pawls inside the automatic movement let the rotor spin freely in one direction and wind the spring in the other.
• Car jack handle: Each downward pump moves the pawl up a tooth on the rack, lifting the car and locking it so it never slips back.
Common Context
Mechanics, hobbyists, and engineers talk about pawls when repairing bike hubs, winches, or clocks. If a tool starts “skipping” or a ratchet “won’t hold,” the usual fix is cleaning or replacing the tiny pawl inside.
Is a pawl the same as a ratchet?
No. The ratchet is the wheel with angled teeth; the pawl is the small arm that engages those teeth to stop backward motion.
Can a pawl wear out?
Yes. Dirt, rust, or simple wear can make the pawl slip, causing the mechanism to skip or fail. Cleaning or swapping the pawl usually fixes it.
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