What is torque and speed?
Speed and torque |
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A cordless screwdriver is operated using the speed control trigger. Squeezing the trigger allows power to flow from the motor to the chuck.
The motor’s power is divided between torque and speed, so the two have an inverse relationship (meaning that when one increases, the other decreases and vice versa). |
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Pulling the trigger starts the chuck turning. The further you pull the trigger in, the faster the screwdriver will go, but the less torque it will deliver. | |||
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The more you release the trigger, the slower the screwdriver will go, but the more torque it will deliver.
Generally, working with tougher materials or larger screws should be done at slower speeds as it requires more torque. |
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What should I look for?A cordless screwdriver with a higher RPM rating and a higher level of torque will be able to complete tasks much quicker than one with a lower RPM and level or torque. |
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However, a cordless screwdriver with a higher RPM may be more expensive than one with a lower RPM. | |||
