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Or compare before with 18Volt Milwaukee FUEL impact wrench on Li Ion Battery [ try before you buy ] its having very much power.
But if you have work the whole day job the best choise for long lasting air tools
An impact wrench works by directing air into a chamber where a hub with sliding vanes turns to do your work for you. If any of the five or six vanes are damaged the tork value will go down. It is possible for the hub to turn freely however the more air that gets past the vanes, instead of pushing on them, the lower your tork value will be. The bearings for the hub could be damaged or seized but that usually affects free spinning speed more than tork. The insides of an impact wrench are fairly simple, take it apart and check the vanes and bearings. Ingersol Rand makes rebuild kits for most of their impact wrenches.
I have never used that brand of impact, but I have used many others and I have never known an electric impact or drill to need oil. You need oil in an air powered impact because the air motor needs lubrication. The electric motors in electric impacts have sealed bearings and brushes that are meant to run dry. The actual impact assembly should be sealed as well, it should not need any oil.
This plug is usually just a shipping plug to keep trash out. Remove it and install a male quick connect. Put some teflon tape or paste on the threads before installing. Then your end of your air hose should have a female quick connect to plug up to the impact.
In line oiler Lubrication is critical to extending the life of your valuable air impact wrench and increase productivity. An air tool that has not been properly lubricated will result in low power output. The usual culprit is a dry motor starving for some oil. Your impact wrench is an expensive investment and you must take the time to properly lubricate it. The easiest and quickest way to make surein line oiler it is constantly lubricated is to install an in line oil lubricator. One of these will insure your air tools are receiving oil every time they are used. In line lubricators attach right into the air hose and you fill them with the correct lubricating oil. (see your manufacturer's specs.). You should also do routine external lubrication through the hammer case grease fitting. A well lubricated air impact wrench will deliver more torque, last longer, run quieter and increase productivity. Don't forget to add an in line oiler to your next impact wrench or air tool. It will pay for itself several times over.
An air-powered impact wrench runs off of an air compressor with a tank – the air compressor should have at least a 10 gallon tank and be able to generate at least 3hp. Also, an impact wrench requires special sockets that are designed to withstand the high torque applied by the wrench.