What Is A Torsion Testing Machine?

What Is A Torsion Testing Machine?

We use so many objects in our daily lives. And many times, we have complained that the object breaks down under stress. So, what is behind this? Well, it is all a result of science. If you want the objects to last longer, you must test them properly before introducing them to the market. The torsion testing machine is used for this. Before delving deeper into what is a torsion testing machine, you must know about torsion testing.

Basically, torsion is the stress which an object can bear. It shows how an object performs when it is under twisted or under angular stress. This actually defines the strength of the object. 

Torsion testing can be subdivided into two different categories:

• Checking the raw materials like plastic tubing and wires to understand the shear strength. 

• Modulus, or functional testing of screws, cables, and sheathed cables.  

Purpose of Using Torsion Testing Machine

Every object that we use undergoes a torsional force which can impact the structure and function of the object, and hence with the help of a torsion testing machine, the engineers can check this value. In case there is an update in the material, they can use this machine to check the results. 

A torsion testing machine helps in assessing the behaviour of the sample under the torsion force. 

Common Applications of Torsion Testing Machine

It might look like a highly technical term, but this machine is used to test the objects that we use in our daily lives. Some of the examples are:

  • Screws
  • ‘Wire
  • Metal
  • Bottle caps
  • Switches
  •  Torsion springs
  • Fasteners
  • Crankshafts
  • Aerospace
  • Automotive parts
  • Biomedical equipment

Standards Defining The Torsion For Some of The Products:

Irrespective of the type and brand of torsion testing machine that you are using, there are certain set standards for this; here is what you need to know about the different torsion testing standards:

• ASTM F1717 – This is used for spinal implant constructs

• ASTM F543 – This one is for metallic medical bone screws

• ASTM A938 – If you are using a torsion testing machine for wires, then this is the standard for it

• ASTM F2346 – This is the standard for the stability of spinal intervertebral disc prostheses

• ASTM D7860-14- It is used in case of torque retention for child-resistant packaging

• IEC 888 – It is used for zinc-coated steel wires


Types of Torsion Test

Now that you know about the different types of torsion testing standards and what it means, you must also know about the different types of torsion tests you use. 

Torsion Test For Failure: In this testing, the sample is twisted till the time it breaks. This one actually tests the strength of the object. 

Torsion Test For Proof: This test is used to check how long the sample material can bear the load. 

Operational Test: It measures the performance of the sample under the set conditions of use. 

In simple words, torsion testing is a way to identify how strong the object is and how well it can retain its stability under stressful conditions. 

Choosing The Right Torsion Testing Machine:

As a manufacturing company, you will come across so many different brands and companies offering torsion testing machine. When investing in the one for your use, you must check the parameters of the machine like the test controller, power source, torsion test fixtures, and position sensor. 


This was the basic information about the torsion testing machine, and if you are planning to buy one, then you must choose a standard brand that can give you the right testing machine. Every manufacturing company must keep a check on all these standards that can ensure their products' longevity. 

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