TORQUE 101 TORQUE TERMS A.S.M.E. – American Society of Mechanical Engineers, known for setting codes and standards for mechanical devices, including torque. CW (Clockwise) / CCW (Counter Clockwise) – Used in all accuracy statements & Certs. Some tools have different accuracy depending on direction of use. Calibration – Adjusting a torque tool or a torque transducer in order to bring it back within spec, which is performed on a calibration system such as the Snap-on TTC2200 or TTC2800. Typical calibration accuracy is ± 4% CW of indicated value. Certification – A form which lists the results of the calibration test. Almost all Snap-on tools are supplied with a N.I.S.T. traceable cert. Snap-on also conforms to the ISO 6789, which is the standard set forth by the International Organization for Standardization (ISO) for torque measurement. Cycling – For mechanical torque wrenches, to “exercise” the wrench for use. With a new wrench, and for first use of the day, set the wrench at the desired torque value and pull for several clicks on a stationary fastener. This exercises the internal wrench mechanism and ensures smooth and accurate operation. ISO 17025 – A laboratory accreditation standard. Most all torque wrenches (including Snap-on) do not come with ISO 17025 accredited certifications. But torque wrenches can receive accredited certification for an additional fee (range of $50-$200 depending on tool) if the end- user desires. N.I.S.T. – National Institute of Standards and Technology is a non- regulatory agency of the US Department of Commerce. They are the federal agency that sets standards for all weights and measures in the U.S. All Snap-on torque products are calibrated on testers calibrated with weights and arms that are all traceable back to N.I.S.T. Newton – A common unit of weight used for torque from the SI system (not metric). Equivalent to 102 grams / .273 pounds. Rolling Torque – Measuring the prevailing torque, or resistance, of a rotating shaft. Strain Gage – Electronic device used to measure the bend (turn resistance) of an object. The measured strain is then translated into torque. Testing – Determines the accuracy of the tool. It does not include adjusting the tool. Commonly called “as found” data. Torque Then Angle – Tightening the fastener to a specific torque, then further turning a specific number of degrees (angle) of rotation. Example: 70 ft. lbs. + 40 degrees. Torque to Yield (TTY) – Same method as T&A except utilizes “single use” or “TTY” fasteners (special one-time-use fasteners which are stretched into their yield zone and cannot be used again). 1 Q: WHY CHOOSE.? A: S NAP-ON HAS INNOVATIVE TORQUE SOLUTIONS FOR ANY INDUSTRY. Snap-on manufactures and sells an extensive array of torque products to cover the needs of professionals within important industries such as: • Automotive • Aviation/Aerospace • Marine • Construction • Energy / Oil & Gas • Manufacturing • Mining • Military A: SNAP-ON OFFERS A WIDE RANGE OF TORQUE WRENCHES. Snap-on's product line is diverse and there is a wide sXelection of choices regarding accuracy level, torque ranges, mechanical and electronic designs, ratchet types, swing arc, physical dimensions, ergonomics and overall features. If a unique application exists, Snap-on will have the torque solution for it. A: SNAP-ON SERVICES WHAT THEY SELL. Snap-on stands by their product with industry-leading warranties, calibration, maintenance and servicing. A: THE VAST MAJORITY OF SNAP-ON TORQUE PRODUCTS ARE DESIGNED, MADE AND ASSEMBLED IN THE USA. Snap-on believes in the importance of local manufacturing. Wherever possible, Snap-on uses American- made parts, American production facilities and a quality American workforce. A: SNAP-ON KNOWS TORQUE. Snap-on knows that torque is critical. And with vehicle manufacturers investing heavily to reduce weight and increase fuel mileage by using a wide array of materials such as high-strength alloys, aluminum and engineered composites, torque is more important than ever. Improved capabilities and technology mean manufacturers can maintain exceptional tolerances on components that are contingent on accurate, consistent torque and angle application. Because of that, Snap-on has torque solutions for any application and are the established benchmark of quality and precision in all industries.
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