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Torque Wrench Calibration

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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…

Torque Wrench Calibration Torque wrench calibration is the process during which a torque wrench is adjusted to ensure its accuracy and precision of a device. It is performed on new tools to show that it was manufactured with high accuracy as well as on used equipment to update it and keep the torque wrench performing at certain standards.
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Leading Manufacturers

North Haven, CT  |  203-484-3707

Custom Calibration Inc. specializes in on-site and laboratory calibration which will keep costly equipment downtime to a minimum and maximize your overall productivity. We have over 30 years of experience providing calibration services for mechanical, dimensional, scale, torque, humidity, and many more applications. Our company’s mission is to achieve total customer satisfaction by providing prompt, precise, tailor-made calibration solutions to fit your specific needs.

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Custom Calibration Inc. $$$

Merrillville, IN  |  800-373-1759

ISO/IEC 17025:2017 & ANSI/NCSL Z540.3 Accredited Laboratory. Electronic, dimensional, physical and thermodynamic calibrations performed onsite and in our lab. Professional ASQ Certified Calibration Technicians. We support the manufacturing and service sectors including; aerospace, automotive, chemical, electronic equipment, energy, food, industrial, machinery, medical, metal, military, nuclear, pharmaceutical, plastics, and transportation. Free local pickup and delivery. In business since 1977.

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Calibration Laboratory, LLC $$$

York, PA  |  717-843-0081

Morehouse is an experienced leader in force and torque measurement helping to create a safer world. We use our knowledge to provide solutions including accurate measurement data and data analysis software. The goal is to help customers make better measurements which can make the difference between success or failure of everyday technology. We offer ISO/IEC 17025 accredited calibrations accurate to 0.002 percent of applied force up to 120,000 lbf and 0.01 percent up to 2,250,000 lbf.

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Morehouse Instrument Company, Inc. $$$

West Conshohocken, PA  |  610-825-3310

For 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.

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Strainsert Company $$$

Monterey, CA  |  831-373-0200

Sierra provides accurate calibration services for mass flow meters and controllers, insertion thermal flow meters, vortex, and ultrasonic flow meters. With more than 40 years of expertise in gas, air, or liquid flow calibration, you can count on our team to make sure your flow meter operates with efficiency and pinpoint accuracy. We believe in providing personalized and customized service, and doing everything we can to maintain credibility with our clients. To get started, contact Sierra today!

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Sierra Instruments $$$

Frederick, MD  |  410-857-1880

ETI is a leader in the calibration of critical test and measurement equipment. Our NIST-traceable calibration services encompass a wide variety of electrical, mechanical, radio frequency (RF), pressure, physical-dimensional, and environmental instrumentation. As a long-term manufacturer of circuit breaker testers, we also have specialized knowledge, tools, and expertise calibrating high-current ammeters that can’t be found at other calibration laboratories.

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ETI Precision $$$

Minneapolis, MN  |  800-328-1235

Process Measurement Company is an ISO/IEC 17025:2005 accredited calibration lab, offering instrument calibration services and equipment calibration to a wide variety of industries. Our calibration company is headquartered in Minneapolis with offices in Denver, Kansas City and Omaha.

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Process Measurement Company $$$

York, PA  |  717-266-5775

Micron Inspection & Calibration Services, Inc. is a full-service calibration and inspection laboratory, established in November 1997, faithfully serving South Central PA and businesses throughout the nation. We are a woman-owned & minority-owned business. Our staff is comprised of expertly trained personnel with military, engineering, quality assurance and inspection backgrounds.

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Micron Inspection & Calibration Services $$$
placeholder image Custom Calibration Inc. Calibration Laboratory, LLC Morehouse Instrument Company, Inc. Strainsert Company Sierra Instruments ETI Precision Process Measurement Company Micron Inspection & Calibration Services

Calibration 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.