![]() What are we talking about when we say size? The most common size impact wrenches are ½-inch drive models-those with a square anvil measuring ½ x ½-inch, that accepts ½-inch sockets. And high RPM help drive nuts or bolts faster, while IPM kick in harder as the resistance increases. Impacts per minute (IPM) increase as revolutions per minute (RPM) increase. Think of amp hours like the volume of a gas tank-a bigger number equals more gas. Generally, 18-volt tools with advanced features and capabilities make them more versatile and easier to use.Īmp hours (Ah) equals the number of amps that the battery will discharge, continuously, for an hour. Tools with 18 and 20 volts have less difference between them. This makes them good for smaller jobs, working overhead, or getting into tight spaces. With smaller batteries, 12-volt impact wrenches are more compact. Batteries: Volts and Amp Hours (Ah)Īll things being equal, higher voltage will give you more power-but there are cases for lower voltage. As a result, the twisting motion-known as reactionary torque-that you feel when using an electric drill is virtually eliminated. Fortunately, impact wrenches are extremely comfortable to use because the concussive blows smoothly transfer most of that high-energy torque directly to the fastener, not to your hand, wrist, or arm. However, all that brute strength isn’t very useful if you can’t control the tool. By comparison, cordless impact wrenches can easily produce torque outputs of over 250 foot-pounds, which is more than enough muscle to power-drive the fattest lags and bust loose rusty, corroded nuts. For example, most cordless drill/drivers produce about 50 foot-pounds of torque, and the average impact driver delivers about 125 foot-pounds. It employs both rotational force (torque) and short-burst concussive blows (impacts) to deliver an unparalleled amount of power. Unlike cordless drill/drivers and impact drivers, which excel at drilling holes and driving screws, the impact wrench is specially designed for tightening and loosening various hex-head bolts, nuts, and lag screws. I'm still running them hard.What You Need to Know About Impact Wrenches How They Work ![]() The other two are showing signs of age with their full-charge run time declining slightly. One recently decided it was time to retire and refused to take another charge. The introduction of this battery adapter is awesome now we can start transitioning towards newer technology, bit by bit, piece by piece. You can go to hardware store, home center, or today and get an 18 volt NiCd battery, or even a brand-new 18 volt tool. That's simply incredible, considering the modern system of 20V MAX tools has been out for 4-5 years. Was it an "engineered obsolescence" sales scheme? Although many people bought new cordless tool sets, lots left to shop elsewhere, swearing off the brand as they went out the door.ĭeWalt on the other hand, has supported tools that last for a seriously long time. People would end up purchasing new tools, rather than ordering older batteries from the factory. It was odd, even though each generation was a same voltage, NiCd battery, there would be a slight change to a a bump or ridge on its case, preventing interchange between versions. It was common that I'd bear the brunt of a shopper's frustration when they learned that each year's version of the store-brand tools had an battery configuration incompatible with the prior model. ![]() Years ago, I worked a second job, at a department store selling their popular exclusive brand of tools. They've outlasted and out performed any other brand of cordless tools I've owned by several years, leaving me a bit of a fan-boy. I've had my own set for about 8 years, and all the tools are still going strong. They're certainly the most common brand on the construction sites I've visited. ![]() It's been one of the most popular lines of professional-quality cordless tools, for a very long time. I believe DeWalt's 18 volt line of cordless tools has been in the market for about 20 years. I've run it through its paces for a month on a variety of my tools. When DeWalt gave me an early-bird chance to try out their new battery adapter and bring modern battery technology to my older tools, I couldn't wait to put it in action. Regular readers of this blog know that I've been personally wielding DeWalt 18 volt cordless tools on my projects for years. ![]()
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