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Irving, Texas
 

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Torque Wrench (CDI Torque Wrench)

 
A torque wrench is a tool used to precisely apply a specific torque to a fastener such as a nut or bolt. It is usually in the form of a socket wrench with special internal mechanisms. It was designed to prevent overtightening bolts on water main and steam pipe repairs underground. Torque is a measure of the turning force on an object such as a bolt . For example, pushing or pulling the handle of a wrench connected to a nut or bolt produces a torque (turning force) that loosens or tightens the nut or bolt.

A torque wrench is used where the tightness of screws and bolts is crucial. It allows the operator to measure the torque applied to the fastener so it can be matched to the specifications for a particular application. This permits proper tension and loading of all parts. A torque wrench measures torque as a proxy for bolt tension. The technique suffers from inaccuracy due to inconsistent or uncalibrated friction between the fastener and its mating hole. Measuring bolt tension (bolt stretch) is more accurate but often torque is the only practical means of measurement.

There are several types of torque wrenches which include Slipper type, Beam type, Deflecting type, Click type, and Electronic.
 
Calibration Specialty is a specialist in the sales and service of torque wrenches. Calibration Specialty features the CDI Torque line of torque products. Here are just a few of the CDI Toque products available at Calibration Specialty.
CDI 10002MRMH
TORQUE WRENCH
CDI 10002MRMH Torque Wrench
Torque Wrench 3/8" Drive, 150-1000 in-lb, Micro Adjust Click-type, Ratchet Head Dual Scale
Learn More
CDI 1002CF3
Digital Torque Wrench 10-100 ft-lb
CDI 1002CF3 Digital Torque Wrench
DIGITAL. TORQUE WRENCH, 10-100 FT-LB, 3/8" DR, 2%/4% ACCY, ELECTR. ADJUST.,
Learn More
CDI 1002MFRMH
TORQUE WRENCH
CDI 1002MFRMH Torque Wrench
TORQUE WRENCH, 10-100 FT-LB, 3/8" DR, MICRO ADJ CLICK-TYPE, RATCHET HEAD, DUAL SCALE
Learn More
See a Full Selection of Torque Wrenches at Calibration Specialty
 
Differences Between Types

Click type torque wrenches are precise when properly calibrated—however the more complex mechanism can result in loss of calibration sooner than the beam type, where there is little to no malfunction. Beam type torque wrenches are impossible to use in situations where the scale cannot be directly read—and these situations are common in automotive applications.

For the click type, when not in use, the force acting on the spring should be removed by setting the scale to 20% of full scale in order to maintain the spring's strength. Never set a micrometer style torque wrench to zero as the internal mechanism requires a small amount of tension in order to prevent tool failure due to unwarranted tip block rotation. If a micrometer tool has been stored with the setting above 20% the tool should be set to 50% of full scale and exercised at least FIVE times before being used. In the case of the beam type, there is no strain on the component that provides the reference force except when it is in use, therefore, accuracy is inherent.

 
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Calibration Specialty based in the Dallas, Texas area provides professional aircraft calibration services, airline calibration services, airline tool calibration, avionics tool calibration, avionics equipment calibration, helicopter calibration services, Fluke mulitmeter repair, Starrett calibration services, Mitutoyo calibration services and on-site calibration repair services.