Over time, a wrench’s performance degrades due to the wear and tear of industrial use. Many pieces of equipment are subject to vibrations, repetitious movements and pollutants that can have a negative impact on the accuracy of the torque wrench; calibration readjusts it so that the performance it delivers matches the amount of torque indicated on the gauge or screen. Read More…
Leading Manufacturers
Strainsert Company
West Conshohocken, PA | 610-825-3310For over 40 years, Strainsert Company has been an industry leader in manufacturing calibration services. Our goal is to provide calibrating services that are thorough and accurate, and we have experience serving a variety of applications. Our team of engineers can find a solution to your application, no matter how stringent your demands. Contact us today and let us know how we may assist you.
Graftel LLC
Elk Grove Village, IL | 847-364-2600Graftel maintains a complete calibration lab for gas flow, liquid flow, air velocity, RH/dew point and temperature. Calibration work is accredited to ISO 17025 and performed in compliance with ANSI/NSCL Z540-1-1994 requirements. Laboratory equipment is maintained in accordance with MIL-STD-45662A.
Caltech Service Corp.
North Olmsted, OH | 440-343-4024Caltech Service is a service company committed to customer satisfaction. We are an ISO 17025 accredited calibration service. All of our service technicians have over 30 years experience in the temperature process calibration field. By providing regularly scheduled service, we develop a detailed knowledge of a customer's control process, responding with expertise to any potential control problem.
Micro Precision Calibration Inc.
Grass Valley, CA | 530-268-1860Micro Precision develops and maintains calibration services and repair services that assure levels of accuracy for your T & ME and gage blocks to high-end electronics. We also have a calibration laboratory, software and pressure calibration to meet your needs. IS0 9001:2000, ISO 17025, NIST Traceability.
Precision Calibration Systems
Morristown, TN | 866-521-3823Total customer satisfaction is our promise here at Precision Calibration Systems. If you’re looking for fast and accurate calibration services, you’ve come to the right place. The scope of our capabilities includes analytical balance, caliper, digital thermometer, electrical measure, electrical source, hardness testers, micrometers and so much more. Contact us today!
Torque Wrench CalibrationCalibration is a comparison between a measurement of a known magnitude and a measurement taken from the wrench that is being calibrated. The difference is observed and then the technician makes the necessary changes and adjustments before measuring again to ensure that the values are identical. The calibration process is important to many industries and companies because the accurate functioning of their torque wrenches is fundamental to their daily operations.
Since torque wrenches are widely used for the correct tightening of nuts and bolts, a torque wrench or other torque tool that incorrectly displays the force may lead to under-tightening which does not provide the proper thread loading or over-tightening which stretches the fastener beyond its limits, causing it to fail.
Torque wrench calibration may take place in a torque lab or onsite. In a torque laboratory, professional calibrators test, repair and adjust torque wrenches and other tools. They service and calibrate torque wrenches to levels of 0.5% to 1% margin of error. A trained technician performs the calibration by attaching a device that is able to produce a correct reading in contrast to the measurement of the torque wrench.
The technician who performs the calibration usually completes a summary report and certificate to show that the torque wrench has been calibrated to industrial and national standards. Another option is to adjust the tools onsite using a system of weights and distances to "teach" the torque wrench what certain measurements are. That is, when a known weight is applied, the wrench can be adjusted to display that measure which it then will use as a reference.
Many mechanics rig up their own systems using a vise and hanging weights. Because torque is the product of force and distance, a torque wrench can be calibrated using a weight that is accurately measured and a known distance. Calibrations are usually performed for the middle of the torque wrench's range and they are usually done within 4% of the exact amount.