What is a Torque Tester?




What is a Torque Tester?

A torque tester is used as a quality control device to test or calibrate torque controlled tools. This includes electronic torque wrenches, click torque wrenches, dial torque wrenches, electric screwdrivers, air screwdrivers, pulse tools, cordless screwdrivers, nutrunners, and torque screwdrivers

To ensure safety and reliability of torque wrenches and torque instruments it is essential the technicians are educated on proper use. Using a quality torque tester correctly makes a safer world through accuracy and precision. Preventing scrapped work, product recall or injury.

Robert Robb, owner. ” Customers want it quick and easy to check for accuracy of their torque wrenches, but don’t know the correct way to use the torque tester. I saw the need for educating the technicians and I decided to offer to them and train the employees how to use it correcly. ”

A representative from our A2LA certified laboratory will perform the training from mounting the tester correctly to downloading the stored torque data to the PC. They will receive a certification of completion as an authorized person to test and calibrate torque instruments, including torque wrenches, manufactured by Snap-on/CDI.

About Robb Precision Tool ServicesdialTorque-Nm-singleScale

Robb Precision Tool Services is an A2LA ISO/IEC 17025 accredited calibration lab which follows the A2LA standards with ongoing training and testing to ensure the most recent methods are followed. Specializing in certification, repair and sales including micrometers, calipers, indicators, various gages, hardness testers, optical comparators, weighing scales and torque. With over three decades of experience in the field of metrology and torque.

We are the largest CDI stocking distributor in the Pacific Northwest and with over two decades of torque experience.

We can offer expert advice on what torque product would best suit your needs.






Robb Precision Tool Services visits Mitutoyo

Robb Precision Tool Services visits Mitutoyo America, Los Angeles for the latest electronic components in precision metrology.

  • To implement the new technology Robb Precision Tool Services received educational training at Mitutoyo, the leader in measuring instruments and metrological technology.


  • RPTS knows the growing need for higher precision, faster data results, and the ability to store statistics. Robb Precision Tool Services wanted their technicians to have hands on education of these new tools.



  • The techs were educated on 2D Linear Height gages, Portable Roughness testers,Digital Micrometers and Calipers, Digital Indicators, Depth Measurement systems, Optical Comparators and Vision Systems, Calibration Equipment and many more.


  • The technicians were also introduced to the new Wireless Communication System that can be used on any tool that provides Digimatic data output. Such as, the Digimatic Caliper,Digimatic Micrometer, Digimatic Indicator and Digimatic Height Gauge.  The Wireless system will eliminate the need for data cables when sending measurements to a PC. This new technology will make it easier, smoother and more efficient without the cumbersome data cables.

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Robert Robb, owner of Robb Precision Tool Services Inc.

“As the requirements for greater accuracy of precision tools are expected, Mitotoyo is meeting these demands. I have had a relationship with Mitutoyo for over 20 years and trust their knowledge and products.”

As a calibration and repair lab, Robb Precision Tool Services understands the need for continued education. With the higher need for accuracy, training in these new technologies is essential to ensure accurate repair and calibration.

To check out more information about Robb Precision Tool Services Inc.,

click on the image below.







What is A2LA Calibration?

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a2la acc

What is A2LA ISO/IEC 17025 Accredited Calibration?    



A2LA stands for the American Association for Laboratory Accreditation. It is a nonprofit 3rd party institution that accredits calibration labs and preforms thorough assessment of all factors of testing and calibration to the ISO 17025 standard.  A2LA laboratories are audited regularly to ensure their continued compliance with requirements and to check that their standard of operation is being maintained.  Lab technicians may be required to take part in comprehensive and ongoing intense testing to ensure the most recent methods are being followed.


Is the most important standard for calibration and testing laboratories around the world. Laboratories that are accredited to this international standard are required to include factors which determine the correctness and reliability of the tests and calibrations preformed in the laboratory by a qualified technician.  Factors that are included are environment control; equipment and measurement traceability;  testing methodology; and reporting of test and calibration results.

The benefits of  A2LA ISO/IEC 17025 certification:

  • To ensure that calibration and testing are accurate and reliable.
  • Laboratories comply with internationally recognized standard.
  • Increase confidence in Testing and Calibration.
  • Save costs on an incorrect indication. Which can cause rework, scrapped product , product recall or injury.


Robb Precision Tool is an accredited A2LA ISO/IEC 17025 laboratory.

Visit our website at robbprecisiontool.com to see all of our calibration and repair capabilities.

mark torque

Robb Precision Tool Services Launches its New Website



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Robb Precision Tool Services Launches its New Website with Enhanced Features, Making it Quick and Easy to navigate.

Our new website includes our new and expanded calibration and repair capabilities of precision tools and torque wrenches. Including,
our extensive line of CDI torque wrenches.

This new website offers several features including our new contact page, making it easier to request a quote, pick up, delivery or onsite calibration. As well as a new personal log in page to view all A2LA cerificates.

Robert Robb, owner. “With our business rapidly growing, we found the need to update and redesign our website. We have a new modern look and have made it easier to navigate to our customer’s specific needs. We are also excited to present our new expanded capabilities for both calibration and repair.”

About Robb Precision Tool Services

Robb Precision Tool Services is an A2La accredited calibration lab which follows the A2LA standards with ongoing training and testing to ensure the most recent methods are followed. Specializing in certification, repair and sales including micrometers, calipers, indicators, various gages, hardness testers, optical comparators, weighing scales and torque wrenches. With over three decades of experience in the field of metrology and torque.

For more information, please contact Bob Robb at (425) 672-7307 or bob@robbprecisiontool.com

Its our BIG sale of the year!




Torque Wrench Facts


Torque Wrench Usage

• All mechanical torque wrenches are calibrated from 20% to 100% of full scale, therefore, they
should never be used below or above those limits
• To determine which torque wrench capacity is best suited for an application, many factors must
be considered. However, as a recommendation, use a torque wrench in the middle 50% of the
overall capacity of the tool. This will result in longer tool life, ease of use for the operator and
increased accuracy from “clicker” type torque wrenches
• Always grasp handle fi rmly in the center of the grip
• Approach fi nal torque slowly and evenly
• Stop pulling wrench immediately when target torque is reached
• Never use a torque wrench to break fasteners loose
• Should be cleaned and stored properly
• Should always be stored at it’s lowest torque setting
• Wrenches should be re-calibrated if dropped. Should never be used in excess of it’s capacity
• Torque wrenches should be “exercised” a minimum of three times at 100% of full scale before
• The wrench selected should be calibrated in the same torque units that are specifi ed
• Use of a “cheater bar” will result in an inaccurate reading and can possibly damage the wrench
• Torque wrenches will last longer if reasonable care is taken. Always unwind handle to the lowest
setting after each use. Do not attempt to lubricate the internal torque mechanism. Clean torque
wrench by wiping, do not immerse. The wrench should be sent to a qualifi ed calibration lab once
every year or every 5000 cycles for re-calibration

Torque Conversion Table
From To  Multiply by From To  Multiply by
ft lb Nm 1.355818 Nm ft lb 0.737562
ft lb mkg 0.138255 Nm in lb 8.850745
ft lb in lb 12 Nm mkg 0.101972
in lb Nm 0.112985 Nm cmkg 10.19716
in lb dNm 1.129848 dNm in lb 0.885075
in lb cmkg 1.152125 cNm in oz 1.416119
in lb ft lb 0.083333 mkg ft lb 7.233014
in lb in oz 16 mkg Nm 9.80665
in oz cNm 0.706155 cmkg in lb 0.867962
in oz in lb 0.0625 cmkg Nm 0.09806


Common Torque Abbreviations 

ft lb = Foot Pound   [lb ft, lbf ft]
in lb = Inch Pound   [lb in, lbf in]
in oz = Inch Ounce   [oz in, ozf in]
Nm = Newton Meter   [N m]
cNm = Centi Newton Meter   [Ncm, N cm]
dNm = Deci Newton Meter
mkg = Kilogram Meter   [kg m, kgf m, kgm]
cmkg = Kilogram Centimeter   [kg cm, kgf cm

May You Have a Blessed Holiday

May You Have a Blessed Holiday