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Torque and speed

Shop for Cordless Drill Drivers

Speed control trigger of a cordless drill driver A cordless drill driver is operated using the speed control trigger. Squeezing the trigger starts the chuck turning.
Finger holding the trigger of a yellow cordless drill driver The further you pull the trigger in, the faster the tool will go, but the less torque it will deliver.

The more you release the trigger, the slower the drill driver will go, but the more torque it will deliver. This is because the motor’s power is a combination of torque and speed, so the two have an inverse relationship (meaning that when one increases, the other decreases and vice versa).

Hand holding a cordless drill driver with the finger off the speed control trigger Releasing the trigger completely stops the drill driver.