Torque wrench calibration has a large effective on total cost of ownership. Using a tool that has fallen out of calibration can result in costly repairs and warranty costs as well as unhappy customers. Calibrating your torque wrench too frequently can result in paying for services when it may not truly be needed. So, how can you know when to send it in for service?
This is a popular question as well as an important subject for many who use torque wrenches or are responsible for quality management in their shop. There is no one size fits all practice for torque wrench calibration intervals. Calendar-based calibration is a popular fall back (example- every six months) but that does not mean that every x amount of months will keep your torque wrench operating at its best. It all comes down to how the tool is used, how often, how intensely, etc.
Things to consider for torque wrench calibration:
- Try and pinpoint when the readings begin to change, example, if they have a tendency to change between 2500 and 2800 repetitions, schedule calibration for 2500 repetitions
- Even though calendar-based calibration is not considered a best practice, every six months is at least a starting point until you can pinpoint a better schedule to fit the needs of your tool.
- If the error on the torque goes beyond the acceptable limit you should recalibrate
- Frequency of use- the more you use it, the more it will need calibrated
- Setting of the wrench as a percentage of full scale is something to think about
- General care both in use and in storage of the torque wrench (ex. if it is beat up or dropped you will want to check the calibration)
- Ambient conditions – again, both during use and while being stored
- If the wrench is subjected to an overload equal to or more than 25% the maximum it should be recalibrated
About e2b calibration:
e2b calibration laboratory provides expert calibration and repair services covering a broad range of test and measurement instrumentation including torque wrench calibration. All calibrations are performed using standards traceable to the National Institute of Standards and Technology (NIST). In addition to our calibration services, you have the option to use our cloud-based asset management system, Anytime Assets , to access your test equipment information online 24 hours a day, 7 days a week from any location with internet access.