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Do You Understand The Differences Between Tensioning And Torquing?

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While looking at the objective of tensioning and torqueing you will not find any difference between the two as both produce clamping force in order to hold parts together. However, one method can be better than the other. Let’s discuss it in this article so that you can appreciate the differences between the two.

Let’s talk about tensioning first. You must have seen hydraulic tensioners where a high pressure fluid is used in order to transfer force, so as to stretch a bolt, while the nut is turned. Here the tensioner tries to stretch the bolt or stud as per the required amount of force. This force is created either by pulling or pushing with the help of hydraulic cylinder. Now you can put the nut on the bolt either manually or by using any suitable wrench. You will not require any great amount of turning force to fit the nut on the bolt.

Now let’s know about the special attributes of tensioning. Following are few of them that you can observe while fitting/tightening the nut on the bolt.

  • Highly accurate
  • Ease of control and stability
  • Appropriate for tightening any large sized bolts
  • It can be little expensive arrangement as compared to any other technique

Now let’s discuss about torqueing…

Here too our objective is to stretch the stud or bolt at certain amount of load, however the stretching is obtained by turning the nut that pulls the shank as there are ramp angle caused by the threaded portion of the nut.

Here nut is rotating on the bolt’s surface, which is clamped. The friction between nut and the bolt surfaces increases as the clam load is increased. Here the main attributes are as follows:

  • Much less expensive to create the set up
  • Less accurate as compared to hydraulic tensioner
  • Simple to use
  • Suitable for smaller sized fasteners
  • More versatile

Determining to use the tensioning or troquing method in your set up will depend upon the need of the job. If you need to tighten small sized bolts and nuts then torqueing system is good enough. Here you can perform your job with a lower budget. Here accuracy may not be a big issue.

On the other hand if you are going to tighten a big and heavy sized nut and bolt then tensioning method will provide you better accuracy and can also save lots of your time.

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