What is A Torque Limited Impact Wrench?

The torque impact wrench limiting function can achieve high-efficiency torque level control, and the torque of forward rotation is limited to prevent over-tightening. The tool will not stop, but the rate of torque increase will slow down, which means you can be sure that the nut is not overtightened.

How does a torque limited impact wrench work?

There are two torque limiting techniques, and their purpose is to reduce the force of forward rotation after reaching a given torque:

Mechanical force adjustment (occurred in the impact mechanism of the wrench)

Airflow adjustment (occurs in the motor of the impact wrench)

Let's take a deeper look at these two technologies to figure out which technology provides excellent performance:

a. Torque-limited impact wrench with mechanical force adjustment

If a bias is applied to the hammer and/or anvil, the two parts will "slide over" each other, although the impact force is still there, but it will be weakened.

b. Torque-limited impact wrench with airflow adjustment

There are two types of airflow adjustments, and their role is to reduce the speed of the rotor, thereby reducing the force. To better illustrate, the following figure shows a non-torque limited air motor:

In a standard non-torque limited impact wrench, since there is no air flow adjustment, the diameter of the air inlet is the same in forward and reverse rotation. Therefore, it usually provides the same level of torque in forward and reverse rotation.

For more product information, click here: Air Impact Wrench Manufacturer.