How to Manage Torque Tools
Torque tools are wrenches that can be preset to a specific amount of pressure (psi), otherwise known as torque, to be applied. Used in all kinds of mechanic work---shop machines, automotive---these tools are essential. When doing precise work, the wrench will not put any more pressure on the fastener than you have already specified. This ensures that the nut will not be too tight or too loose, which is essential when working on parts that require precision, and prevents stripping. Torque wrenches are a good addition to a home tool collection, since they are useful for routine car maintenance and will prevent you from stripping threads in common problem areas such as oil pans.
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Instructions
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Check the manual to see if the threads on the fastener you are working with need to be lubricated. If so, apply lubrication as specified.
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Hold the wrench firmly, and move in a smooth motion. Tighten the fasteners you are working with gradually. According to Popular Mechanics, you should start tightening fasteners "in the middle of the assembly and working in a widening spiral. Begin with one-third of the final torque; return to the first fastener and tighten all to two-thirds of the final torque. Repeat, in sequence, to the final torque." Listen for the "click." Once you hear the click, the torque wrench should no longer be applying pressure. Do not try to force it any further at this point. Using your torque wrench in this manner will ensure even pressure all around, preventing fasteners on one side of your project from becoming difficult to work with.
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Clean your torque wrench after every use with a clean shop rag. This will keep grit and dirt from building up in the mechanism which will cause problems with your wrench.
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After cleaning the torque wrench, lubricate it per the manufacturer's directions. Note: Not all torque wrenches will require lubrication.
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The torque wrench should always be kept in a place where it will not be dropped or banged around. Keep it in the case it came with between uses, as being subjected to rough treatment can cause premature failure or inaccuracy.
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Tips & Warnings
Take your torque wrench to be calibrated at least once a year. You can find mechanics who have the equipment to calibrate torque wrenches. Such a shop is known as a TMDE shop-- Test, Measurement and Diagnostic Equipment.
Do not use your torque wrench to loosen bolts, as it will add unnecessary wear and tear to the wrench. Use a regular socket wrench for removing bolts. According to PS, the Preventive Maintenance Monthly, using your torque wrench to loosen bolts can affect its calibration.
References
- Photo Credit torque wrench and accessories image by Christopher Dodge from Fotolia.com
