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Tips: Working principle of click type torque wrench
The principle of a click type torque wrench emitting a click sound is very simple. It can be divided into the following steps to understand:
1. After the torque wrench makes a "click" sound, it indicates that the desired torque value has been reached.
2. The "click" sound issued by the torque wrench is produced by its internal torque release structure, which is composed of three structures: pressure spring, torque release joint, and torque ejector.
3. First, set the required torque value on the torque wrench (the spring is sleeved on the top rod to apply pressure to the torque release joint), lock the torque wrench, and start tightening the bolts. When the bolt reaches the torque value (when the torsion force is greater than the pressure of the spring), the effect of instantaneous disconnection will occur. At the moment when the disjoint effect is produced, the joints are knocked, and the metal shell of the wrench makes a "click" sound. This confirms reaching the torque value like a reminder.