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How does a cordless screwdriver work?

Shop for Cordless Screwdrivers

Inside of a cordless screwdriver Imagine the inside of your cordless screwdriver like an electrical circuit. When you pull the speed control trigger, a switch on the inside of the tool’s casing conducts electricity from the rechargeable battery to the motor.

Every time you pull the trigger, you are completing the circuit, allowing power to flow through the screwdriver.

Battery

Inside of a cordless screwdriver - rechargeable battery Every cordless screwdriver has a rechargeable battery.

Motor

Inside of a cordless screwdriver - motor The motor converts the battery’s electrical energy into mechanical energy giving the rotation required to turn the chuck.

The motor’s power is a combination of torque and speed.

Gearbox

Inside of a cordless screwdriver - gearbox Power is transferred from the motor to the chuck via the gearbox.

Depending on the make and model of your cordless screwdriver, the gearbox may offer the possibility to select different gears, and therefore speed ranges.

Chuck

Chuck rotating in a cordless screwdriver The motor’s power causes the chuck, and therefore the bit, to rotate, allowing the cordless screwdriver to drive screws or drill holes.