The helical spring are made up of a wire coiled in the form of a helix and in primarily intended for compressive or tensile load .The cross-section of the wire from which the spring is made may be circular ,square or rectangular.The two forms of helical springs are compression helical spring & torsion helical spring.

The helical spring have following advantage .
1. The are reliable .
2. These are easy to manufacture .
3. These have constant spring rate.
4. These are available in wide range .
5. These performance can be predicted more accurately .

Material for helical spring 
The material of the spring should have high fatigue strength ,high ductility ,high resilience and it should be creep resistant . It largely depends upon the service for which they are used severe service , average service or light service.

Severe service - severe service means rapid continuous loading where the ratio of minimum to maximum load is one-half or less , as in automotive valve springs .

Average service - average service includes the same stress range as in severe service but with only intermittent operation .as in engine governor springs and automobile suspension springs.

light service - light service inculdes springs subjected to loads than are static or very infrequently varied . as in safety valve springs. 


The main dimensions of a helical spring subjected to compressive force . They are as follows  .

          d    = wire diameter  of spring (mm)
          Di  = inside diameter of spring coil (mm)
          Do = outside diameter of spring coil (mm)
          D   = mean coil diameter (mm)

Therefore ,
                      D 1 + D 2
          D =    ----------------


There are three objective for design of the helical spring.

1. It should posses sufficient strength to withstand the external load .
2. It should have the required load-deflection characteristic .
3. It should not buckle under the external load .

This artical was taken by  v b  bhandari & r.s. khurmi ,j.k. gupta .


  1. The article is good but not the full detail of the article

  2. This is a great article thanks for sharing this informative information. I will visit your blog regularly for some latest post. For the best and professional helical pile driver residential and commercial contractors, you can visit on torqueandhammer.ca. For more Helical piles Surrey


  3. I just want to let you know that I just check out your site and I find it very interesting and informative. Get for more information api valve manufacturer in germany

  4. Thanks for taking the time to discuss that, I feel strongly about this and so really like getting to know more on this kind of field. Do you mind updating your blog post with additional insight? It should be really useful for all of us. buy instagram likes famoid

  5. If your property has not been maintained and/or improved on the outside via considered landscaping, then it will detract from all your efforts on the inside. Paving Amarillo TX

  6. Greetings! Very useful advice in this particular post! It’s the little changes that will make the largest changes. Many thanks for sharing!
    Lug Butterfly Valve Manufacturer In USA


Thank you for the comment