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Compression Springs Compression Springs

Enter your Outside Diameter and Free Length
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Outside Diameter
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Inside Diameter
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Free Length
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Wire Diameter
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Total Coils
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Rate
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Material Type
Max. Load
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Max. Deflection
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Solid Height
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*Required Field
Extension Springs Extension Springs

Enter your Outside Diameter and Length Inside Hook
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Outside Diameter
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Length Inside Hook
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Wire Diameter
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Max. Load
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Max. Deflection
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Initial Tension
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Rate
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Material Type
*Required Field
Torsion Springs Torsion Springs

Enter your Outside Diameter and Total Coils
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Outside Diameter
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Inside Diameter
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Total Coils
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Free Position
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Wire Diameter
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Body Length
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Max. Torque
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Max. Deflection
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Rate
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Leg Length
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Material Type
*Required Field
Conical Springs Conical Springs

Enter you Small Outside Diameter, Large Outside Diameter and Free Length
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Small Outside Diameter
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Large Outside Diameter
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Free Length
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Rate
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Total Coils
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Solid Height
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Wire Diameter
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Material Type
*Required Field

Compression Spring Abbreviations

At CompressionSpring.com we offer stock springs and all kinds of compression springs. From regular stock compression springs to even custom barrel springs, we have springs galore to cover all your needs. We also make it easy for you to find what you need. All you have to do is use Spring Finder and input some simple dimension ranges that you would like your spring to meet. However, it has been brought to our attention that we use abbreviations throughout our site. This is true and our abbreviations are industry standard abbreviations that refer to different parts and measures of the spring but we thought it could be useful to explain them briefly.

 

  • OD stands for Outer diameter:

    it is the width of your spring measured from outside the coil. Knowing this measurement is very important to make sure your spring fits in your application, especially when it is inserted into a hole or tube.

  • ID stands for Inner diameter:
    it is the width of the “hole” at the center of the coils. Knowing this measurement will help you determine if the spring will fit over a shaft, mandrel, or tube.
Coil Spring Inner Outer DiameterCoil Spring Inner Outer Diameter
 
D stands for mean Diameter:
the mean diameter is right in the middle of the inner and outer diameter and is measured from center of wire to center of wire. To learn more about compression spring diameters click here.
 
  • FL stands for Free Length:

Free length is the actual length of a compression spring without any sort of load or force being placed on it.

 

  • WD stands for Wire Diameter:

The thickness of the wire used to form a specific spring.

How to measure a Compression SpringHow to measure a Compression Spring

The total amount of coils that a spring has including active and closed coils, in the case of closed coils on the ends.

 

  • AC stands for Active Coils:

The number of open coils within a compression spring’s body. Open coils are determined by whether there is pitch in between the start and the end of the coil.

How to Count Total Coils and Active CoilsHow to Count Total Coils and Active Coils
Closed and Squared Compression SpringClosed and Squared Compression Spring
C stands for Closed and Square:
  • The end coils are closed and don't have pitch, therefore, not all the coils on your spring will be active. In this case you may calculate your active coils by subtracting 2 coils from your spring's total coils:

TC - 2 = AC.

Closed and Gorund Compression SpringClosed and Gorund Compression Spring
CG stands for Closed and Ground:
  • These ends are the same as closed and square ends, but they go through a grinding process. This eliminates about half a wire diameter off the first and last coils so that your spring will stand vertically. The calculation process for active coils is the same as the one used for closed and square ends.

    Total Coils - 2 = Active Coils. 
Double Closed Compression SpringDouble Closed Compression Spring
DC stands for Double closed ends:
  • These ends have two closed coils on each end, adding up to 4 inactive coils. Therefore, to figure out the active coils when it comes to this type of ends, you'll have to subtract 4 coils from your total coils:

 

TC - 4 = AC.

Open End Compression SpringOpen End Compression Spring
O stands for Open Ends:
  • These ends are the opposite of closed and square ends because they are open wound, just like the rest of the spring’s coils. Therefore, all the coils of a spring with open ends are active.

 

TC = AC

 

Buy the Perfect Compression Springs

 

At CompressionSpring.com we are always looking for ways to make buying your compression spring a great experience. If you have any suggestions on how we can improve our online tools and/or services, please let us know at support@compressionspring.com. If you have any questions about the information provided or would like help to purchase the perfect spring for you needs, you can call us directly at: (951) 276-2777 and ask to speak to one of our engineers.