How to use the torque wrench correctly and the reasons for the failure?

1. How to use the torque wrench correctly
1. Set the required torque value and turn the locking device to the lock position;
2. Adjust the torque from a small value to a large value. If it exceeds the set value, adjust it back to a value lower than the set torque value;
3. Do not directly adjust from the maximum value to the minimum value;
4. Check whether the drive head is suitable, or choose a suitable adapter;
5. The center of the handle is the force application position;
6. Before applying force, please make sure that the wrench is indeed combined with the object being applied;
7. The application of force should be steady and slow, and the application of force should be stopped after the spring is released when the sound is heard;
8. Turn the setting value back to the minimum scale after use;
9. When using a large torque wrench, the operator should pay attention to the center of gravity of the body.

2. Reasons for the failure of the torque wrench
1. The self-locking function cannot be adjusted. This happens often because the range adjustment exceeds the maximum range; the lock key is reversed too tightly.
2. There is no sound when the amount is exceeded. The reason for this is that the direction adjustment button is misplaced.
3. The torque joint slips, which is because the joint is not installed in place; the direction conversion button is not pulled in place.
4. The torque value cannot be adjusted. In this case, the locking key is often in a self-locking state.