Available in corded or cordless options, a drill rotates a drill bit clockwise to bore holes in materials by cutting and removing waste materials. A drill applies constant torque. Equipped with a driver bit, a drill can turn screws, bolts, and other fasteners into materials. The drill can reverse to remove the fasteners. Users supplement the rotary power by pushing onto the drill from the back.
Also, when drills bog down, one common trick to coax them along is to deliver short bursts by quickly pressing the trigger several times. It's these supplementary actions that relate the drill to the impact driver and that sometimes lead owners of drills to explore purchasing an impact driver. An impact driver is shaped like a drill but usually it is shorter and smaller. It has many of the same features as a drill, such as a handle, trigger, and a type of chuck called a hex collet.
The difference between an impact driver and a drill is that an impact driver delivers the sequential bursts of power users often try to get with drills more effectively. It delivers those bursts automatically, without the user having to do anything. An impact driver also drills at a constant speed as needed and draws upon the bursting action when the driver senses resistance in the work material. Impact drivers powered by air compressors have long been used in the garage for vehicles.
These tools are much more powerful than typical drivers and will help you drive regular screws and larger fasteners through material that would hold up even the highest powered regular drill. Many drills have keyed chucks that allow you to switch parts in and out seamlessly.
Many of these drills will have chucks that are nearly universal to any tool you could think to use with your drill. Impact drivers have collets that only accept hex shaped driver bits. This is largely because impact drivers serve a much more specialized purpose than regular drills.
For that, choose a hammer drill. Impact drivers are for driving fasteners, not drilling holes. However, in a pinch, if you have the proper bit, you can drill a hole in light-gauge steel or softwood with a standard hex-shank drill bit.
Otherwise, the added torque of the driver will snap the bit. But for basic home repairs, a moderately priced drill should be adequate. Drills are versatile. Some have more settings for both speed and torque, and some even have an impact setting. They also can tackle many kinds of small projects because they can use a wide variety of bit types.
Experts agree that when building your tool collection, begin with a drill. But for the passionate DIYer, adding an impact driver will afford you the tools needed for almost any project. Driving the bolts used in securing the beams of a pergola is one example where an impact driver comes in handy. It runs on battery power, which is why it can be operated without a cord.
The lack of a cord also allows users of these drivers to be able to get into tight spaces and to avoid being near a power supply. The main job of a cordless impact driver is to drive in screws. But it can also be used for turning bolts and nuts. A cordless impact driver is especially good for long screws, and they tend to be used when a screw needs to be driven into a very tough or hard material.
The reason why a cordless drill driver can carry out each of these tasks is that it produces a very high amount of torque. Cordless impact drivers tend to be lightweight power tools.
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