What is the role of a torque wrench in mechanical assembly?

The role of a torque wrench in mechanical assembly is to apply a specific force to tighten fasteners. This tool is designed to ensure that fasteners, such as bolts and nuts, are tightened to a precise tension that is specified by engineering standards or manufacturer guidelines. Applying the correct amount of torque is critical because it ensures that the fasteners function properly without stretching or breaking and prevents issues such as loosening due to vibration or thermal expansion.

Using a torque wrench helps achieve consistency and reliability in assembly, which is particularly important in industries where safety and performance are paramount, such as automotive, machinery, and structural applications. By applying the correct torque, one can avoid damage to the components being fastened and ensure optimal performance of the assembled mechanism.