What is the primary function of a torque wrench?

The primary function of a torque wrench is to measure the amount of torque applied to a fastener. Torque is a measure of the rotational force that is applied around an axis, and it is crucial in various mechanical applications, especially in assembling components where the correct tightness is essential to ensure proper function and safety. A torque wrench is calibrated to provide accurate measurements of this force, allowing the user to apply the required torque to bolts and nuts according to specifications. This ensures that connections are secure without being over-tightened, which could lead to damage or failure.

In contrast, tools that measure tension in cables or check alignment have entirely different functions and principles of operation from those of a torque wrench. Additionally, devices designed for determining the weight of objects measure mass rather than rotational force. Understanding the specific functionalities of tools is critical in mechanical applications to achieve desired results and maintain equipment integrity.