Calibration with Torque Testers

Torque wrenches are always calibrated in an increasing direction from the low-end to the high, never in a decreasing direction.

This is because of the friction present in the mechanical contacts. When calibrating a flexible beam wrench, a force would be exerted on the handle until the wrench indicated the first point chosen.

At that time the dial indicator on the tester is read and compared to the indication on the torque wrench.

The next higher point would then be set on the wrench and again the tester indication would be noted and compared to the reading.

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