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Originally published: October 10, 2020
Last updated: July 2025 — This article has been reviewed and updated with the latest torque calibration standards, ISO requirements, and modern torque testing equipment to ensure continued relevance and accuracy.
As of 2025, torque wrench calibration continues to be a key element in ensuring mechanical integrity across manufacturing, aerospace, and energy sectors. Industry standards such as ISO 6789-2:2017 and ASME B107.300 are being increasingly adopted globally, requiring stricter calibration traceability and uncertainty measurement.
Modern torque calibration systems now include automated testing benches, integrated data logging, and cloud-based reporting to streamline quality audits. Tools like the Norbar Pro-Test 3 and Additel 780S with torque modules offer high-accuracy torque verification from 0.5 Nm to over 1,500 Nm, meeting the needs of both lightweight and heavy-duty assembly operations.
Furthermore, the demand for onsite torque calibration services has grown, as industries aim to minimize downtime while maintaining compliance. Having a certified calibration provider with mobile lab capabilities ensures that tools remain reliable without disrupting production schedules.
🔗 Related Internal Link: Advanced Torque Measurement Tools for Mechanical Calibration and QA
🔗 Explore Category: Calibration Instruments
Torque wrenches are essential tools in industries where bolts and fasteners must be tightened to precise specifications. From automotive manufacturing to aerospace and energy sectors, accurate torque application is critical to ensure safety, performance, and structural integrity. However, like all precision instruments, torque wrenches require regular calibration to maintain their reliability.
In this article, we’ll explore the importance of torque wrench calibration, calibration standards, common procedures, and tools used for this crucial task.
🔧 What Is Torque Wrench Calibration?
Torque wrench calibration is the process of verifying and adjusting the output of a torque wrench to ensure it delivers the correct torque value. Over time and usage, these tools can drift from their specified accuracy due to wear, overloading, or environmental factors.
Calibration ensures that the torque wrench still meets the manufacturer’s specifications and international standards such as:
ISO 6789 (for hand torque tools)
ASME B107.300 (US standard for torque instruments)
Failure to calibrate can lead to:
Under-torqued or over-torqued fasteners
Safety risks in structural applications
Non-compliance with quality assurance programs
🔗 Related Internal Link: Why Calibration Matters in Quality Assurance
⚙️ Types of Torque Wrenches
There are several torque wrench designs, and each may require a slightly different calibration approach:
Click-Type Torque Wrench: Emits a mechanical ‘click’ when desired torque is reached.
Beam-Type Wrench: Uses a visual scale to indicate torque value.
Dial-Type Wrench: Displays torque on a dial gauge, often used for precise measurements.
Electronic Torque Wrench: Features digital readouts and may offer data logging.
🔗 Shop Torque Tools: Torque Collection
🧪 How Is Torque Wrench Calibration Performed?
Calibration is typically done using a torque analyzer or calibration system. Here’s a basic overview of the procedure:
Set Up the Calibration System: Secure the torque wrench to a reaction arm connected to the torque transducer.
Apply Torque: Slowly apply force until the wrench indicates the target torque.
Read Output: The actual torque is read on the calibration system.
Compare and Adjust: Differences between the wrench’s reading and actual torque are noted. If needed, the wrench is adjusted.
Record Data: Results are documented in a calibration certificate.
Most systems allow multiple test points (e.g., 20%, 60%, 100% of range) to assess linearity.
🔗 Related Internal Link: Calibration Instruments
🛠️ Recommended Calibration Equipment
At JansenCalibration.com, we offer high-precision torque calibration solutions and instruments:
Norbar T-Box 2 Torque Calibration System – Portable system with touchscreen interface.
Mountz Torque Analyzer – Accurate torque measurement up to 2000 Nm.
Additel 762 Automated Test System – Full-featured system with automatic control and documentation.
All instruments are shipped with traceable calibration certificates from our ISO 17025-accredited lab.
📝 Compliance and Documentation
Maintaining proper documentation is key for audits and quality assurance programs. A valid torque wrench calibration certificate should include:
Measured torque values
Tolerance and deviation
Calibration date and due date
Traceability to national standards
🔁 Calibration Interval & Best Practices
How often should you calibrate a torque wrench? Industry best practices suggest:
Every 5,000 cycles or 6–12 months (whichever comes first)
After any event of overload or impact
When used in safety-critical applications (e.g., aerospace)
Storage & Usage Tips:
Store at minimum torque setting
Avoid dropping the tool
Never exceed the maximum torque rating
🔗 Check Also: How to Build a Calibration Schedule
✅ Conclusion
Torque wrenches are precision tools, and like any precision instrument, they require regular calibration to perform reliably. By adhering to recognized standards and using certified calibration equipment, industries can ensure mechanical safety, reduce liability, and maintain compliance.
At JansenCalibration.com, we provide not only top-grade torque wrenches and calibration equipment but also expert services to keep your tools audit-ready and accurate.
🛒 Explore our Torque Calibration Products or contact our support team for tailored recommendations.
