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I can't see very much from the picture but it looks to be a tapered spring with a radius of 2.43mm. O.K. I've created a tutorial for youbut I don't know what version of SW you are using so I can't guarantee that it will work, I'm using SW2006. Here goes. First sketch a circle on the top plane. With the circle selected, go to insert\curve\helix spiral, as shown in thepicture below.
The image below will show you what to do next.
No.1, set the start angle to 0, this is not necessary but it will make things easier in the next step.
No.2, determine the desired number of revolutions.
No.3, use the arrow protruding through the centre of the spring to adjust the height, alternatively you can enter a value for the pitch (This will determine the space between each revolution)
No.4, set the taper value (If desired), you can taper outward or inwards.
I should also mention that you can select variable pitch,but thatshould be self explanatory so I won't explain it unless you want me to.
No.5, select the green arrow to accept the parameters you defined in the above steps.
Now, select whichever plane the end of the spring is touching (This is why we set the start angle to zero, you could also choose 90, 180 or 270 degrees, so long as it touches the plane, otherwise you would have to insert a 3D sketch).
Adjust the view so you are looking at right angles to the plane (Normal To) and insert sketch.
Select Circle (or whatever shape the cross-section of the spring should be), place the mouse over the spring so as to highlight it and sketch a circle at the endpoint of the spring.
Exit the sketch and proceed to the next step.
Select the Swept Boss/Base command.
Select the circle as the profile and the helix as the path, you should get a preview as shown above.
Select the green arrow to accept this.
That is about all there is to it, good luck and don't hesitate to ask if you don't understand
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Here is a sample of a spring I made in solid works
for spiral spring, while using helix/spiral dropdown menu, change the " defined by" option from " pitch & revoltion" to " spiral.. there u need to define number of revolutions.. thats it u got the spiral spring...
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