In our new series of blog posts, we examine some of the common myths surrounding calibration of your Torque Wrench.
Myth 1: Calibration is only needed for new torque wrenches.
Reality: Calibration is a crucial aspect of maintaining the accuracy of torque wrenches throughout their entire lifespan, not just when they are newly purchased. While it’s understandable to assume that a brand-new torque wrench would be perfectly accurate, the truth is that all torque wrenches, regardless of their age or condition, can experience drift over time.
Several factors contribute to this drift:
Wear and Tear: Frequent use of a torque wrench, especially under high-stress conditions, can lead to mechanical wear. This wear can affect the internal components that measure and apply torque, resulting in deviations from the intended settings.
Environmental Factors: Exposure to extreme temperatures, humidity, and other environmental conditions can affect the calibration of a torque wrench. Even slight changes in temperature can influence the accuracy of the torque measurement, as materials expand or contract.
Internal Adjustments: Internal mechanisms of torque wrenches can shift or loosen with time. For instance, the internal spring or electronic components (in the case of digital torque wrenches) might need recalibration to maintain precise torque settings.
Routine Maintenance: Regular calibration checks are necessary to detect and correct any inaccuracies that may develop. Even a torque wrench that has been used infrequently can become less accurate over time due to the reasons mentioned above.
Consistency in Performance: Regular calibration ensures that the torque wrench consistently delivers the correct amount of torque, which is vital for applications where precision is critical, such as in automotive repairs or assembly processes. Minor inaccuracies in torque settings can lead to under-tightened or over-tightened bolts, potentially compromising safety and performance.
In essence, maintaining a calibration schedule for torque wrenches—whether they are new or old—ensures their reliable performance and accuracy. Regular calibration checks help catch any deviations early, allowing for timely adjustments and ensuring that the torque wrench continues to meet the required standards of precision.