As technology improves, cordless impact wrenches trade tools keep getting better and better. However, there are still a lot of bad ones out there. If you’re looking for a cordless impact wrench, make sure you get a battery that’s powerful enough, it has enough torque for the job, and you remember getting what you pay for.
The battery has always been the weak point of most cordless tools. Always being overweight and not providing enough power. Battery technology is finally catching up, and cordless impact wrenches are starting to become a better option than their pneumatic counterpart. Some things to consider are lithium ion batteries (which come on most newer wireless keys) last longer and are lighter than the older Ni-Cad batteries.
Also, a more powerful battery trade tools(i.e. 18 volts versus 14.4 volts) is not necessarily better. It is not uncommon for a more expensive, higher quality impact wrench, with a 14.4 volt battery, to be more powerful and durable than a cheaper 18 volt wrench. This has a lot to do with the efficiency of the wrench, and an inefficient wrench will lose a lot of power through the engine, rather than transferring it to the bolt you’re trying to take off.
This brings me to the next point that with cordless tools you get what you pay for! This is not the kind of thing you want to go cheap for. We’re just now getting to the point where cordless impact wrenches are really worth using, and unfortunately, that technology is still only with the more expensive wrenches. It will eventually drip into the cheaper keys, but it’s not there yet. Keep in mind that you definitely get what you pay for!
Another thing to consider trade toolsis how much torque it has and whether your key has variable torque control. With a new wrench, you want to make sure it’s powerful enough for your toughest jobs. But if you’re going to be using your new impact wrench for a number of different sized bolts, having variable torque control can be great for making sure you don’t strip / spin or over-tighten your smaller bolts.
One more thing to keep in mind is that many cordless impact wrenches value their torque as inches / pounds, where most pneumatic wrenches are rated in feet / pounds. The conversion rate is 12, and if you see something in inches / pounds, divide that number by 12 to get foot-pounds. So a cordless wrench at 1,950 in-lbs will add up to 162.5 ft-lbs.
Battery impact wrenches keep getting better and better, but if you want to buy one you still have to consider the type of battery, how much torque there is, whether the torque is variable, if the torque is given in in-lbs or ft -lbs, and also that you get what you pay for.