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How does a torque wrench work?
Torque wrenches work by measuring the amount of torque you apply to a fastener and displaying it either electronically or on a beam scale. Mechanical torque wrenches allow you to set a desired torque value and will make an audible click to alert you when you've reached it.
How to use a torque wrench?
Set the desired amount of torque on the wrench, then use the wrench to tighten the fastener, applying consistent and even force until it alerts you that your desired amount of torque has been applied to the fastener. With beam type wrenches, you’ll need to read the scale as you apply force to know when to stop. Check out our guide on How to Use a Torque Wrench to make sure you're ready to use it properly.
How to set a torque wrench?
Electronic torque wrenches can be set with a few button presses, and often let you choose from different torque measurements. Mechanical torque wrenches are typically set with a rotating handle that corresponds to measurements on the wrench shaft, rotate the handle until it reaches the torque value you need.
How to calibrate a torque wrench?
It's a good idea to occasionally calibrate your torque wrench to make sure it's still accurate. The standard is to calibrate every 5,000 uses, or every 12 months. Automatic and electronic torque wrenches may require specialized calibration equipment and technicians, but mechanical torque wrenches can be calibrated at home by hanging a known weight from the lever arm and setting the wrench to that weight, then checking to see if it clicks, and adjusting the internal spring accordingly. Check manufacturer instructions for specific calibration techniques for your wrench.
How to read a torque wrench?
Electronic torque wrenches have displays that are easy to read. Beam scale torque wrenches show how much force is being applied on the scale face. Mechanical torque wrenches are set by rotating the handle to correspond to torque values on the tool shaft.
