Your toolbox isn’t complete without the proper torque wrench. This instrument is used to apply a pre-determined torque to a fastener, like a nut or bolt. It allows for tightening of specific measurements to provide proper tension, without being at risk for over tightening. There are plenty of different torque wrench types to choose from, including mechanical and electrical. Learn all about the types of torque wrenches available in our guide to find the right one for you.
Torque is measured in both length and force. Length refers to the distance from the “center of drive” to the “center of handle.” Force, on the other hand, means “pounds,” “Newtons,” etc.
The standard formula is: length x force = torque. When torque is applied to a threaded fastener, it draws the joint together, creating a clamp load as the fastener begins to stretch. Clamp load amount is determined by various factors, including:
Applying the accurate torque is essential for safety, assembly and performance of equipment. If the inaccurate amount of torque is applied, it can result in loosening or breaking of fasteners and equipment failure.
Electronic torque wrenches, also referred to as digital, are torque multipliers that are connected to an electric motor. These types of torque wrenches are programmable to set limits, by which the torque level is determined. They provide an audible alert once the correct torque is reached and displayed via LED reading. In addition, electronic torque wrenches also include helpful features such as a chip for memory saving, which can be uploaded onto a computer to use for spreadsheets and documents.
The beam torque wrench is the most basic when it comes to this tool. The wrench head and handle are separated by a lever arm. This flexes against a visual indicator (scale) gauge to show the amount of torque weight being applied. These types of torque wrenches are typically heavy in weight and, because they’re manual, are also the most cumbersome in comparison to more developed styles.
A dial torque wrench is engineered to mechanically display the data on a dial. These tools are typically used as a quality control instrument to verify or monitor torque. They can also be used for join testing, auditing or verification of torque applied. This instrument captures the finishing torque applied to a fastener with a memory pointer to provide a high degree of accuracy.
These tools fall under the category of click-type torque wrenches. Interchangeable head torque wrenches are extremely versatile, which makes them the preferred choice for various industries like automotive and mechanics. Once the right amount of torque is applied, the tool emits a warning signal or a “click” to prevent over tightening.
The micrometer torque wrench has forward and reverse capabilities. It has a quick release trigger so it’s easy to set, adjust and read. It provides fast, accurate tightening fit for metalworking, plumbing and other industrial jobs. Since it’s easily transportable, this tool also has a rubber bumper on the head for protection.
Torque wrench use is based on the particular model and type, as well as the task at hand. After all, each style yields different results. Here are a couple of features to take into consideration before buying:
Be sure to put in the necessary research before purchasing a torque wrench to ensure it’s the right fit for you and the task at hand.
The information contained in this article is intended for general information purposes only and is based on information available as of the initial date of publication. No representation is made that the information or references are complete or remain current. This article is not a substitute for review of current applicable government regulations, industry standards, or other standards specific to your business and/or activities and should not be construed as legal advice or opinion. Readers with specific questions should refer to the applicable standards or consult with an attorney.
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