What is the primary purpose of a torque wrench?

What is the primary purpose of a torque wrench?

• A. To loosen bolts
• B. To tighten fasteners to a specified torque
• C. To measure the torque value
• D. To cut threads

Answer: (B)

A torque wrench is used to tighten fasteners to a specified torque so the clamping force on the joint is controlled. Setting the tool to the exact torque value and applying force until the wrench indicates the target is reached ensures the bolt or nut is loaded precisely as intended. This prevents problems from under-torque, such as a loose connection that can vibrate free, and from over-torque, which can stretch or shear threads, crush gaskets, or damage parts. The tool provides a clear cue (click, deflection, or readout) when the preset torque is achieved, making it reliable to achieve consistent, correct preload. It isn’t primarily a device for loosening bolts, measuring torque in isolation, or cutting threads.

A torque wrench is used to tighten fasteners to a specified torque so the clamping force on the joint is controlled. Setting the tool to the exact torque value and applying force until the wrench indicates the target is reached ensures the bolt or nut is loaded precisely as intended. This prevents problems from under-torque, such as a loose connection that can vibrate free, and from over-torque, which can stretch or shear threads, crush gaskets, or damage parts. The tool provides a clear cue (click, deflection, or readout) when the preset torque is achieved, making it reliable to achieve consistent, correct preload. It isn’t primarily a device for loosening bolts, measuring torque in isolation, or cutting threads.