To Cord or Not to Cord?
First, you need to determine if a corded or cordless model is better for your needs.
There was a time in the not-so-distant past when cordless drills were bulky and cumbersome, and boasted a battery life of around 5 minutes. Not so today. Thanks to technological advances, manufacturers are making cordless models that are lightweight, safe and long-lasting. You can pop in a battery, tote them anywhere and knock out a job in no time. However, in terms of raw power and torque, most cordless drills have yet to catch up to their corded cousins. If you want portability and convenience, but you plan to use it a lot, we recommend getting a second battery or investing in a cordless drill with a quick-charge function.
For heavy-duty jobs, there’s still nothing like a corded power drill. They are lighter. They have more power. They have more torque. And, they won’t run out on you halfway through the job. Also, corded drills often offer more bells and whistles than your average cordless model. If you’re using your drill every day, or you drill in things like masonry, a corded power drill is a must-have.
Types of Drills
Impact drivers may look like a common drill, but they can give you up to three times the torque thanks to an internal power-train system. Inside, a spring-loaded hammer strikes up to 3,200 blows per minute against the sides of an anvil, which turns the hex chuck to deliver incredible fastening power. Look for impact drivers with high torque ratings, and opt for extras like variable-speed triggers, soft grips and built-in LED lights for increased versatility.
Air drills use compressed air instead of electricity to produce contractor-grade power. Compared to electric tools, air tools are typically cheaper, smaller and lighter, while still delivering the same (or even higher) power. However, air drills require air compressors, which are heavy, noisy and often pricey.
Rotary hammers boast an internal piston that provides a pounding action in addition to the rotation, which can be especially useful for drilling stone, masonry or concrete.
Impact wrenches are heavy-duty, incredibly versatile fastening devices that are used in applications like automotive repair, construction, equipment maintenance and product assembly. They offer a good amount of torque and come in both corded and cordless varieties and in a range of voltages, RPMs and sizes.
Right angle drills have a chuck mounted at a 90-degree angle and are typically small enough to give you access to hard-to-reach areas. Right angle drills are available in both corded and cordless models.
What About Power Sources?
Most cordless drills these days come equipped with a lithium ion (Li-Ion) battery. That’s because they’re lightweight; they hold a ton of power and they don’t lose capacity over time.
Nickel-Cadmium (NiCad) batteries are usually less expensive than Li-Ion, plus they boast a relatively long life cycle and a resistance to heat and impact. NiCad batteries do suffer from a “memory effect,” meaning they can lose their capacity with subsequent uses. However, you can get around this by draining the battery completely before recharging.
For cordless drills, it’s simple—the higher the voltage, the more drilling power you’ll get. Keep in mind that a higher voltage typically means a heavier battery, and that a heavier battery doesn’t always equate to longer life.
When it comes to corded models, wattage is the thing. The more wattage your new toy has, the more power it’ll deliver and the longer it’ll last before overheating, meaning less wear and tear over time.
As you go up in power, you’ll also go up in price. So, you may want to balance your need for power with your budget to find a happy medium.
Find the Right Chuck Size and Type
Your chuck holds your drill bit in place. There are three chuck sizes. A 1/4-inch chuck is more for light-duty tasks, a 3/8-inch chuck will do for most average work and a 1/2-inch chuck is made to tackle tougher jobs. There are three main types of chucks:
Keyed chucks require a chuck key, which means it’ll take you longer to change bits, but you’re less likely to get slippage.
Keyless chucks tighten and loosen around your bit without a key, which is better if you need to change bits frequently.
SDS chucks offer the best of both worlds—they change as quickly as a keyless system but offer the grip of a keyed chuck. Of course, this advantage is built into the price.
The Bells and Whistles
Aside from power, torque and cord type, drills come with all sorts of extras. You’ll find them with:
- Brushless motors for less noise and more efficiency.
- Built-in levels for easier accuracy.
- Built-in lights for drilling in low-lighted locations.
- Side handles to give you maximum control and stability.
Before you pull the trigger on a new drill, use our tips to make sure you’re getting one that gives you the speed, convenience and accuracy you need to get the job done right every time.
The product statements contained herein are intended for informational purposes only. Such product statements do not constitute a product recommendation or representation as to the appropriateness for a specific application or use. W. W. Grainger, Inc. does not guarantee the result of product operation or assume any liability for personal injury or property damage resulting from the use of such products.