Understanding the Function of a Torque Wrench

What is a torque wrench?

To begin, a torque wrench is a hand tool used to tighten threaded components—such as bolts or nuts—to a specific level of torque. This tool is essential because it allows the user to set and apply a precise amount of tightening force, ensuring the correct pressure is achieved.

Function of a torque wrench

Now that we’ve seen what a torque wrench is, let’s look at its function. A torque wrench is used exclusively for tightening threaded components—it is not designed for loosening. One of its key features is the ability to adjust and control the torque applied during tightening. This means it can precisely measure and apply the correct torque to ensure proper fastening.

This function is especially useful in automotive and industrial vehicle workshops, where it’s critical to apply the manufacturer’s recommended torque to bolts. Doing so prevents over-tightening, which could lead to deformation or damage of parts. When the preset torque is reached, the wrench emits a click or releases slightly to signal that no further tightening should occur.

While torque wrenches are primarily used in workshops, they are also widely employed across various industrial applications where controlled torque is essential.

Types of torque wrenches

Torque wrenches can be categorized into three main types based on the specific application needs. The primary differences lie in the type of head they use and the amount of torque they are capable of delivering. Here are the main types:

1. Click Torque Wrench: A click torque wrench is one of the most widely used types due to its simplicity and reliability. It is designed to apply a specific amount of torque to a fastener.

2. Beam Torque Wrench The beam torque wrench is a simple, mechanical type of torque wrench that uses a flexible beam to indicate the torque being applied in real time. It’s one of the oldest types but still valued for its durability and ease of use.

3. Electronic (Digital) Torque Wrench An electronic (digital) torque wrench is a high-precision tool that uses electronic sensors to measure and display the torque being applied. It offers the most accurate and user-friendly torque control, especially for critical applications.