If you’ve recently inherited old Warren and Brown torque wrenches, such as the model 3220 deflector beam, you may find yourself wondering if it requires calibration.
Renowned for their durability and accuracy, these tools are often passed down through generations. However, the question arises: does age impact their precision?
The legacy of Warren and Brown
Warren and Brown torque wrenches, particularly those from the 70s and 80s, have established a reputation as some of the finest tools available. These wrenches were essential for tasks such as tightening head bolts, harmonic balancer bolts, and flywheel pulley bolts. Despite their exceptional quality, even the best tools need occasional attention to maintain their performance.
Do they need calibrating?
Generally, Warren and Brown deflecting beam torque wrenches are designed to retain their accuracy over time, provided they are well-maintained. Proper storage, such as keeping them in their original boxes and ensuring they are not left under tension, plays a significant role in preserving their precision. However, if the tool has been mishandled or stored improperly, it might require calibration.
DIY calibration check
If you are comfortable performing a basic calibration check at home, here are some steps you can follow:
- Comparison Test: utilise a modern ratchet-type torque wrench for comparison. Secure a large bolt in a vice and test both wrenches at various torque settings (e.g., 3-5 different settings). This will give you a good indication of whether your Warren and Brown wrench is still accurate.
- Torque Test Rig: a bolt in a vice can serve as a makeshift torque test rig. This setup allows you to apply known torque values and compare the readings from your old wrench to those of a calibrated tool.
Professional calibration
For those who prefer a professional touch, seeking out a specialist for calibration services is a prudent choice. In regions like East NSW/ACT, services such as Torque Calibrations offer NATA-certified and traceable calibrations. While the cost varies depending on certification requirements, professional calibration is highly recommended if you are undertaking critical tasks, such as assembling an engine.
If you are confident in the tool’s history and condition, a simple comparison test might suffice to verify its accuracy. However, for critical tasks or for complete peace of mind, professional calibration is the best option. With proper storage and maintenance, Warren and Brown torque wrenches can continue to be a reliable and precise tool for many years to come.
Old Warren and Brown torque wrenches are built to last and typically maintain their accuracy. But it is always wise to check their calibration status, especially if they have been subjected to rough handling or improper storage. Whether you opt for a DIY approach or seek professional services, ensuring your torque wrench is accurately calibrated will guarantee its reliability and effectiveness in all your tasks.
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