What does the motor do?
What does the motor do? |
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Inside every cordless impact driver is a motor – a clever little machine that converts the battery’s electrical energy into mechanical energy giving the rotation required to turn the chuck. | |||
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The motor’s power is a combination of torque and speed, and is measured in watts.
A motor with a higher wattage will be more efficient, and will be able to deliver a greater level of torque at a higher speed. |
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Please note: Motor wattage is a fairly new way of measuring the power of cordless tools; as a result, some manufacturers may not have this information to hand. | |||
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However, if this information is provided, it’s a useful way of comparing several different models. Generally, a 100 watt motor or higher will allow you to work with tougher materials and larger screws at higher speeds. | |||
Air flow holes |
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When working for long periods of time, or when carrying out heavy-duty tasks (driving large screws into tougher materials), the motor can heat up. While this is a normal occurrence, frequent overheating can cause damage to the motor. Some cordless impact drivers have holes in their casing , which allow air to reach the motor and help cool it down. | |||
