Screwdriver Category

Screwdriver Power Tool FAQ

What is the difference between a drill driver and an impact driver?

A drill driver is designed for precision drilling and light fastening with an adjustable clutch to prevent over-driving screws. An impact driver uses a rapid concussive mechanism to provide high torque, making it superior for driving long or heavy-duty fasteners into tough materials without stripping the screw head.

How do I choose the correct torque setting on my power screwdriver?

The torque setting, or clutch, determines how much resistance the tool applies before it stops spinning. For small screws or soft woods, use a lower numerical setting to avoid snapping the screw or sinking it too deep. For larger fasteners and hardwoods, increase the setting to provide more driving power.

Can I use standard screwdriver bits in an impact driver?

It is recommended to use "impact-rated" bits specifically designed for the high-torque demands of impact drivers. Standard bits are often too brittle and may shatter or deform under the intense rotational force produced by the impact mechanism.

What voltage should I look for in a cordless power screwdriver?

For household tasks and light assembly, a 4V to 12V tool is usually sufficient and lightweight. For professional construction, heavy DIY projects, or driving large lag bolts, an 18V or 20V platform is the industry standard for providing adequate runtime and power.

How do brushless motors improve power tool performance?

Brushless motors use electronic controllers instead of physical carbon brushes to manage power. This results in less internal friction, which leads to longer motor life, increased battery runtime per charge, and more power delivered to the screwdriver head in a more compact tool design.