Office Address

  • F 101 Rudraksh Complex 2, Phase 3, GIDC, Vatva, Nr. Jasoda Nagar Cross Road, Ahmedabad, 382445, Gujarat
  • +91 78789 91188

Torque wrenches are crucial tools in various industries, ensuring precision and accuracy in tightening bolts and fasteners. However, like any measuring instrument, torque wrenches require regular calibration to maintain their reliability. In this step-by-step guide, we will delve into the intricacies of torque wrench calibration, shedding light on the process carried out at Prism Calibration Centre.

Torque Wrench Calibration

Step 1: Assessment of the Torque Wrench

The calibration process begins with a comprehensive assessment of the torque wrench. Highly skilled technicians at Prism Calibration Centre inspect the wrench for any visible damage, wear, or irregularities that may affect its performance. This initial examination sets the foundation for a thorough calibration process.

Step 2: Verification of Torque Values

Before calibration, it is essential to verify the torque values on the wrench. Prism Calibration Centre uses precision instruments to confirm the accuracy of the torque settings. Any discrepancies in the values are noted for adjustment during the calibration process.

Step 3: External Cleaning and Lubrication

To ensure accurate readings, the torque wrench is meticulously cleaned to remove any dirt, debris, or residual substances. Additionally, a proper lubrication process is carried out to optimize the wrench’s mechanical components, enhancing its overall functionality.

Step 4: Zero-Load Calibration

Zero-load calibration is a critical step in the process. The torque wrench is set to zero and subjected to precise measurements. Any deviation from the expected values is carefully noted and adjusted, ensuring that the wrench returns accurate readings when used in practical applications.

Step 5: Calibration at Various Torque Levels

Prism Calibration Centre employs advanced equipment to calibrate the torque wrench at multiple torque levels relevant to its designated range. This step helps identify and rectify any nonlinearities or inconsistencies in the wrench’s performance across different torque settings.

Step 6: Adjustment and Fine-Tuning

Based on the calibration results, adjustments are made to the torque wrench to bring it into alignment with the specified standards. Fine-tuning is a delicate process, requiring expert knowledge to ensure that the wrench delivers precise torque values across its entire range.

Step 7: Re-Verification and Final Checks

After adjustments and fine-tuning, the torque wrench undergoes a re-verification process to confirm that the recalibration has been successful. Final checks include a thorough examination of the wrench’s components and a re-evaluation of torque values to guarantee accuracy.

Step 8: Documentation and Certification

Prism Calibration Centre places great emphasis on maintaining comprehensive records of each torque wrench calibration. Detailed documentation is prepared, outlining the entire calibration process, adjustments made, and final verification results. A calibration certificate is then issued, providing clients with tangible proof of the wrench’s accuracy.

Step 9: Quality Assurance

Before the calibrated torque wrench is returned to the client, it undergoes a final quality assurance check. This ensures that every aspect of the calibration process has been executed to the highest standards, and the torque wrench is ready for reliable use in the field.


Torque wrench calibration at Prism Calibration Centre is a meticulous and systematic process that guarantees the accuracy and reliability of these essential tools. Through careful assessment, precise adjustments, and thorough documentation, the centre ensures that torque wrenches meet the highest industry standards, providing clients with confidence in their equipment’s performance. Regular calibration at Prism Calibration Centre not only extends the lifespan of torque wrenches but also contributes to the safety and efficiency of various industrial applications.

Frequently Asked Questions (FAQs)

The frequency of calibration depends on factors such as usage, industry standards, and manufacturer recommendations. Generally, torque wrenches should be calibrated annually or more frequently if they are subjected to heavy use or harsh conditions.

The assessment involves a comprehensive examination by skilled technicians at Prism Calibration Centre. They inspect the wrench for visible damage, wear, or irregularities that may impact its performance. This initial assessment sets the foundation for the calibration process.

Before calibration, torque values on the wrench are verified using precision instruments. Any discrepancies are noted for adjustment during the calibration process. This ensures that the torque wrench delivers accurate readings in practical applications.

External cleaning removes dirt, debris, and residual substances that may affect readings. Lubrication optimizes the mechanical components, enhancing overall functionality. Clean and lubricated torque wrenches provide more accurate and consistent results.

Zero-load calibration involves setting the torque wrench to zero and subjecting it to precise measurements. Any deviation from expected values is adjusted, ensuring accurate readings during practical applications. It is a critical step to eliminate errors at the no-load condition.

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