They also have the advantage of being lighter as they don’t have battery weight. They generally offer significant tightening torque. For impact electric screwdrivers, the speed is indicated in counts per minute: it is between 3,000 and 50,000 cps/min.Ī corded electric screwdriver allows for intensive use. For corded electric screwdrivers, this is between 3,000 and 6,000 rpm (rotations per minute) and for cordless electric screwdrivers between 180 and 450 rpm. The rotation speed is an essential element, especially if you need to use your electric screwdriver regularly: corded electric screwdrivers generally have a higher speed of rotation than cordless ones. Generally, electric screwdrivers only have one rotation speed. Certain electric screwdrivers are called impact electric screwdrivers: they are used for intensive screwing/unscrewing. This can go from 3.6 volts (V) to 18V for the most powerful ones. For cordless electric screwdrivers, a high voltage allows for a longer battery life and avoids having to recharge the batteries too often.
For cordless electric screwdrivers, the power is linked to the battery voltage. If the electric screwdriver is powered by an external transformer, the higher the supply voltage, the more powerful the screwdriver will be. For mains powered corded electric screwdrivers, that power depends directly on the power of the motor. The tightening torque is directly linked to the power of the screwdriver. The higher the tightening torque, the easier screwing will be, even in hard material. A high tightening torque means a strong screwing force.
The tightening torque is another point it’s important to consider. It is important to pay particular attention to the screwdriver’s efficiency, especially if it needs to be used intensively. If it only needs to be used 2 or 3 hours a day, however, a cordless model might be appropriate, perhaps keeping an extra battery and a charger close by.
If it needs to be used all day, it is better to choose a corded model. The second point it is important to define is the screwdriver’s frequency of use. For example, will you be using it frequently for construction work? New buildings or renovations? In a mechanical workshop? For furniture? On an assembly station? Choosing the right electric screwdriver depends on what you will use it for.
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