Do Old Warren and Brown Torque Wrenches Need Calibrating?

Do Old Warren and Brown Torque Wrenches Need Calibrating?

If you've inherited an old Warren and Brown torque wrench, such as one of our deflecting beam models, you might wonder if it needs calibrating. These tools are renowned for their durability and accuracy, often being passed down through generations. But does age affect their precision?

Understanding Warren and Brown Torque Wrenches

Warren and Brown torque wrenches from the 70s and 80s were among the best for tasks like tightening head bolts, harmonic balancer bolts, and flywheel pulley bolts. Known for their reliability, these tools have stood the test of time. However, even the best tools require some attention to maintain their accuracy.

Do They Need Calibration?

In general, Warren and Brown deflecting beam torque wrenches shouldn't need calibration if they've been well-maintained. Proper storage, such as keeping them in their original boxes and without tension, helps preserve their accuracy. However, if they've been roughly handled, dropped, or stored improperly, calibration might be necessary.

DIY Calibration Check

You can perform a basic calibration check at home to ensure your torque wrench is still accurate:

Comparison Test: Use 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).

Torque Test Rig: A bolt in a vice can serve as a makeshift torque test rig.

Professional Calibration

If you prefer a professional touch, consider taking your torque wrench to a specialist. For those in Melbourne, visit us in Maidstone for expert torque wrench calibration and repairs. In Sydney, head to Torque Calibration Services, and in Tasmania, visit Calspec for reliable calibration services.

For personal use, especially if you trust the tool's history, a simple comparison test might suffice. For critical tasks or peace of mind, consider professional calibration. With proper storage and maintenance, your Warren and Brown torque wrench can remain a reliable tool for years to come.