How to Read the Torque Value on a Torque Wrench?
4 Answers
If it is a dial-type torque instrument, directly read the data indicated by the pointer as the measured value; if it is a socket with an auxiliary scale indicator, first read the scale value on the main scale, then add the value on the auxiliary scale or micrometer sleeve to get the measured value. Introduction to torque wrenches: 1. Select a torque wrench with an appropriate range: When using a torque wrench, first choose a wrench with a suitable range based on the requirements of the workpiece to be measured. The measured torque value should not be less than 20% of the wrench's range during use. A too-large range is not suitable for reinforcing small torque components, and a small-range torque wrench should never be used beyond its range. 2. Determine the preset torque value according to the required torque value of the workpiece: When setting the torque value, adjust the main scale line and the differential scale line to the desired torque value.
As an experienced mechanic, I'll teach you how to read torque wrench values: There's a dial ring on the wrench, just turn it clockwise to your desired torque value. Common units are Newton meters or foot-pounds. Read the markings carefully to avoid mistakes – some wrenches click once when reaching the specified torque. Before taking readings, ensure the wrench is clean and placed horizontally without tilting to prevent measurement errors. Also, pay attention to calibration; check it annually to prevent value drift. In my daily repair work, I've found that over-torquing can damage bolts, so stop decisively. Unit conversion is crucial too, with 1 Nm ≈ 0.737 ft-lb – consider carrying a small conversion card. This way, your readings will be accurate and safe.
As a DIY enthusiast, using a torque wrench is super simple for me. Just rotate the scale ring on the handle to set the desired value, with units like N·m or lb·ft marked on the tool body. When tightening furniture bolts, I preset the value, then pull the handle until I hear a "click" and stop immediately without applying extra force. Ensure good lighting to read the scale clearly. Keep the wrench level to avoid angled use. For different units, check a conversion table on your phone to prevent mixing them up and applying incorrect torque. I recommend buying a branded wrench with clear scales and storing it in a dry place to avoid rust affecting readings.
As a beginner learning car repair, the steps for reading torque values are straightforward: locate the numerical scale on the wrench, adjust it to your desired unit like Newton meters. When using, slowly pull the handle until it clicks and stop to avoid over-torquing and damaging parts. Print a unit conversion chart and keep it in your toolbox for convenience. Ensure the wrench is clean before reading. Regular calibration maintains accuracy.
