What Is An Air Impact Wrench?

What is an air impact wrench?

Pneumatic screwdrivers are essentially tools used to tighten and loosen screws and bolts. They are called this because they are powered by compressed air: to work, they must be connected to an air compressor. Since this function does not use electric current, the pneumatic screwdriver can be used completely and safely even in an environment that is not completely dry.

Structurally, it is similar to a drill bit. Although it can perform some drilling operations, it is different from the latter in some special functions. In fact, screwdrivers are usually equipped with a reducer, called a plug-in, which can reduce the number of rotations of the tool. Generally, as in USAG impact wrenches, there can be two or more speeds: the lowest one is used for tightening, and the highest one is used for unscrewing. You can also choose the direction of rotation, clockwise or counterclockwise, according to whether you need to perform tightening or loosening.

Pneumatic wrenches can be linear or pulsed. In the first case, they are small, narrow and long, and work through an impeller that produces an almost constant rotational movement. On the contrary, in the second case, they do not rotate linearly, but generate pulses that rotate the insert by beating. They are also equipped with square drivers for socket wrenches. These screwdrivers are used to speed up tightening and loosening operations as well as for heavier machining operations, because due to their structure, they can unscrew the most stubborn bolts. In the event of resistance or various other obstacles, specific mechanisms will be activated. For example, impact wrenches are so called because they can rotate and strike at the same time to generate impact. In this way, when the bolt has greater resistance, the firing pin continues to operate, shaking the anvil in the gun until the bolt loosens. This is possible because the firing pin is hooked on the anvil, and the anvil rotates to push the bolt. If the anvil cannot rotate, the firing pin starts to work and dislocates itself for another rotation and starts striking the anvil. To better illustrate, we will show you the internal appearance of a pneumatic impact wrench.