Proper torque tool calibration is essential for maintaining accuracy, safety, and compliance in any industry where precision matters. But one question many people ask is: how often should torque tools be calibrated? This article answers that question, explains why calibration is important, and provides practical guidance.
Why Calibrate Torque Tools?
Torque tools — such as torque wrenches, multipliers and screwdrivers — are precision instruments. Over time, their internal components can wear, springs can fatigue, and accuracy can drift. Without regular calibration:
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Fasteners can be under- or over-tightened, leading to equipment failure or safety hazards.
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Quality control issues may arise, especially in regulated industries.
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Non-compliance with standards (e.g., ISO 6789, UKAS) could result in failed audits or product recalls.
Regular calibration ensures that your tools remain within manufacturer and industry-specified tolerances.
Industry Standards and Guidelines
The most commonly referenced standard for hand torque tools is ISO 6789. According to ISO 6789:
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Tools should be calibrated at least once a year or every 5,000 cycles, whichever comes first.
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For critical applications, more frequent calibration (e.g., every 3–6 months) may be necessary.
Our calibration centre follows these same guidelines and issues certificates confirming traceability and compliance.
Factors That Affect Calibration Frequency
While annual calibration is a good rule of thumb, several factors may mean your tools need to be checked more often:
✅ Frequency of Use: High-use tools wear faster and should be calibrated more frequently.
✅ Operating Conditions: Harsh environments (dust, moisture, extreme temperatures) can accelerate wear.
✅ Criticality of Application: If torque accuracy is mission-critical, more regular calibration is justified.
✅ Storage & Handling: Poor storage or accidental drops can affect accuracy.
For sensitive equipment, our measuring instrument calibration services ensure your instruments remain compliant and precise.
Best Practices for Calibration
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Log every calibration in a maintenance record.
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Implement a colour-coded or tagged system to identify when tools are due for calibration.
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Train staff to handle torque tools properly to extend their calibration interval.
We also offer on-site calibration for businesses that prefer minimal disruption.
Need Help With Calibration?
At Applied Torque, we offer professional torque wrench calibration and torque tool calibration services that are UKAS-accredited, ISO-compliant, and tailored to your needs. Whether it’s a one-off calibration, a managed program, or sensitive instrument calibration, we ensure your tools perform to specification.
👉 Learn more about our Torque Tool Calibration Services here
Summary: Most torque tools should be calibrated annually or approx. every 5,000 uses. However, your specific needs may vary depending on usage and criticality. Regular calibration protects your business, your customers, and your reputation.
For advice or to book a calibration, contact us today.
Applied Torque — experts in torque tool calibration and servicing.
