Torque Techinacal Information What is Torque? Torque is a 'turning' or 'twisting' force and differs from tension which is created by a straight pull. However, we use torque to create tension. How? Referring to the diagram below it can be seen that as the nut and bolt are tightened the two plates are clamped together. The thread angle in the bolt converts the force applied into tension (or stretch) in the bolt shank. The amount of the tension created in the bolt is critical. Why?  When a bolt is tensioned correctly it is working at its optimum efficiency and will resist coming undone. However, if the tension is too low the nut couid vibrate or work loose. If the tension is too high (overstretched), the bolt could break. Every bolt has a correct optimum torque/tension figure for each fastening application. It is important to have these figures available so that the end product will be safe, efficient and economical. In the following sections, you will find plenty of useful information to help specify the correct fasteners, and tools to tighten them, for each requirement. You can also find the details of an easy-to-use; calculator for converting that information into CORRECT  TORQUE VALUES. How do we measure Torque? Referring to the diagram above it will be seen that Torque is the result of multiplying the value of Force applied by the Distance from the point of application. Comparing the two examples it will be noted that the same resultant Torque can be achieved with a lower Force if the Distance from the nut/bolt is increased It should also be realised that some torque wrenches are "length dependant" which means that the actual torque applied to the fastener varies if the hand position on the wrench is varied - even with the wrench preset! This occurs if the pivot point of the wrench mechanism is not coincidental with the point of application of torque. Note: Most Torqueleader wrenches are not length dependant.