1. The opening size of the selected torque wrench must be consistent with the size of the bolt or nut. If the opening of the wrench is too large, it is easy to slip off and damage the hexagon of the screw. In the maintenance of imported vehicles, attention should be paid to the selection of the metric British system of the wrench; Selection principles of various wrenches: generally, socket wrenches are preferred, followed by ring wrenches, open-ended wrenches, and then adjustable wrenches.
2. In order to prevent the spanner from being damaged and slipping off, the pulling force shall be applied to the thicker side of the opening. This point shall be paid special attention to the adjustable spanner with large force to prevent the opening from appearing "eight" shape and damaging the nut and spanner.
3. The torque wrench is designed according to the force of human hands. When encountering tight threaded parts, it is not allowed to hit the wrench with a hammer; Except for the socket wrench, other wrenches shall not be fitted with the booster rod to prevent damage to the wrench or threaded connection
4. When the torque wrench is used, when you hear the "snap", it is very appropriate to understand the principles of various torque wrenches and the functions of various parts.
