Why Don't 4S Shops Use Torque Wrenches?

[LeHeidi]

4S shops do not use torque wrenches because the torque measurements are inaccurate. They can only tighten based on the number of turns. Below is an introduction to torque wrenches: Introduction: A torque wrench, also known as a moment wrench or torque spanner, is a type of wrench generally categorized into electric torque wrenches and manual torque wrenches. Principle: Torque is the product of force and distance. When tightening threaded fasteners such as screws, bolts, and nuts, it is necessary to control the applied torque to ensure the threads are securely fastened without being damaged due to excessive torque, hence the use of a torque wrench. Application: Torque wrenches are used for tightening bolts. High-strength bolts can be divided into two types: twist-off type and large hexagon type. According to national standards, twist-off high-strength bolts come in four sizes: M16, M20, M22, and M24.