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Compression Springs Compression Springs

Enter your Outside Diameter and Free Length
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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

What is a Coil Spring’s Diameter?

Definition of Coil Spring Diameter

 

It is the “width” of a helical spring’s coils.

 

Today we want to share a few essential facts and useful information regarding the diameter of your coil spring. When it comes to measuring your spring’s coil diameter, you must determine which diameter is the one being measured. There is outer diameter and inner diameter. To understand the difference note the following:

 

Outer Diameter (OD) is the width of your spring measured from outside the coil. Knowing this measurements is very important to make sure your spring fits in your application, specially, when it is inserted into a hole or tube.

 

The Inner Diameter (ID) 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.

 

The mean coil diameter (D) is right at the middle of the inner and outer diameters. It is measured from center of wire to center of wire.

 

Coil Spring DiameterCoil Spring Diameter
Fact #1

Increasing the coil diameter will make a spring weaker while decreasing it will make it stronger.

 

Fact #2

A compression spring’s coil diameter will expand a little during deflection. However, an extension spring’s coil diameter will contract during deflection. This is because one compresses while the other extends thus creating opposite effects and opposite results.

 

Fact #3

When it comes to torsional springs, they deflect radially so the coils are tightened during deflection. The result of this is the inner diameter contracting more noticeably than compression and extension springs.

 

Coil Spring Diameter ChangeCoil Spring Diameter Change

 

Understanding the different diameters used in designing a spring and selecting one is an important step. Once you determine at least one of these you can input it in the Spring Finder search so you can find the metal spring you need. If you can't find what you need in our stock, you can create your own spring with Spring Creator. For additional help or assistance in finding the ideal spring contact us today at: (951)276-2777.

 

Invest in precision and quality

Spring Creator 5.0 offers you the possibility to design springs that perfectly fit your needs. Our platform not only allows you to design various types of springs but also provides advanced tools like the Online Spring Force Tester to simulate and evaluate spring performance. Visualize your design in 3D, download detailed blueprints, and get instant quotes. Try it for free and discover why we are the preferred choice of engineers and makers!

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Created by Alfonso Jaramillo Jr

President Acxess Spring

Over 40 Years of Experience in Spring Engineering and Manufacturing