Should You Double Click a Torque Wrench?

No, you should not double-click a torque wrench. Torque wrenches are specifically designed to apply a precise amount of torque to a fastener. Double-clicking can lead to inaccurate torque readings, causing potential damage to the fastener or tool.

Proper Torque Application with a Click-Type Wrench

When using a click-type torque wrench, follow these steps:

Set the Desired Torque: Adjust the wrench to the required torque setting. Apply Torque Slowly: Turn the wrench smoothly and continue until you feel or hear a click. This signal indicates that the preset torque has been reached. Release and Reset: After the click, stop applying force and carefully remove the wrench from the fastener. Always reset the torque setting to its lowest value after use to maintain calibration.

Double-clicking can cause the wrench to exceed the intended torque, potentially leading to inaccurate readings or damage to the tool. The click mechanism is calibrated for a single application of torque, and repeated clicking can lead to inconsistent results.

Common Reasons Not to Double-Click

While it's generally recommended not to double-click, there may be exceptions:

Low Torque Situations: In cases of very low torque values, the click might be subtle. A second click can provide additional reassurance that the correct torque has been achieved. For Practical Assurance: Double-checking with a second click can help catch any inconsistencies or mistakes.

However, it's important to recognize that double-clicking can alter the natural feel of the torque wrench and might skew your torque application. It’s more reliable and safer to rely on the single click mechanism as intended.

Care and Maintenance of Torque Wrenches

Proper care of a torque wrench is essential:

Storage: Torque wrenches should never be stored with the handle wound up to the highest setting. They should always be stored at the lowest setting to prevent accidental damage. Calibration: Mechanical torque wrenches need regular calibration. It’s recommended to calibrate them at least annually to ensure accuracy and reliability.

In the automotive industry, for instance, every torque wrench used on an airplane must be calibrated annually. This is to ensure that the fasteners are tightened to the specified torque, maintaining safety and functionality.

The Role of Torque in Automotive Applications

Torque is a critical factor in automotive maintenance and repairs, particularly concerning fasteners like lug nuts. Incorrect torque can lead to issues such as:

Loose or Damaged Fasteners: Lug nuts that are too loose can damage the studs, leading to failure and costly repairs. Reverse the situation, and overly tight lug nuts can make it challenging to remove the wheel, potentially causing damage to other components. Pulsating Brakes: When lug nuts are tightened unevenly, it can cause pulsation in the brakes, leading to a poor driving experience and potential safety hazards.

It’s crucial to ensure that all fasteners are tightened to the same torque to avoid these issues. For example, if lug nuts are torqued to 100 foot-pounds, they should all be tightened to that exact value to ensure consistent performance.

Conclusion

Double-clicking a torque wrench is generally unnecessary and can lead to inaccurate or inconsistent torque readings. Always set the desired torque, apply it smoothly until you hear the click, and then release the wrench. Proper care and regular calibration of torque wrenches are also essential to maintain accuracy and safety in your maintenance or repair work.