What is a torque wrench primarily used for?

A torque wrench is primarily used to tighten a bolt or nut to the specified torque. This tool is essential in various mechanical and automotive applications, as it allows for the precise application of torque, ensuring that fasteners are not overtightened or undertightened. Over-tightening can lead to failure of the component or stripping of the threads, while under-tightening can result in loosening, which can compromise the integrity of the assembly.

When using a torque wrench, the user sets it to a specific torque value, typically indicated in units such as foot-pounds or Newton-meters, as specified by the manufacturer for specific applications. This ensures that the connections are secure and capable of handling the stresses they will encounter during operation.

Other tools and methods are used for different purposes, such as measuring dimensions, checking fluid levels, or balancing a motor, but none of those tasks involve the specific function of applying a precise amount of torque, which is the defining feature of a torque wrench.