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How does a cordless impact driver work?

Whereas a drill simply puts power to the motor and drives it in a constant, linear rotational motion, an impact driver has much higher torque and applies the force in a different fashion.

When you pull the trigger on an impact driver, a force is applied in a rotational "hammering" motion, or, an "impact". Broadly speaking, it's like having a hammer inside the motor, pounding out rotation and a few thousand times per minute.

This makes for a tool that is highly effective at driving screws and lag bolts.

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Cordless impact driver vs. an impact wrench

Impact drivers use 1/4" bits and are designed for driving screws and lag screws. An impact wrench uses a 1/2" drive that sockets are attached to drive lug nuts and nuts and bolts such as for work on a

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