How to Measure Extension Spring Dimensions in Four Easy Steps

A successful spring application involves the installation of the right spring for the job. Measuring the dimensions of an existing extension spring is not difficult at all. All you need are the right tools and our easy-to-follow instructions.

TOOLS:

• Micrometer
• Calipers
• Ruler or tape measure  – for large springs

STEPS:

1. Measure the wire diameter.
   It is recommended that you measure the wire diameter in two different spots using a micrometer and take the average. This will allow for precise readings and accurate ordering.
2. Measure the outside diameter.
   Commonly referred to as “OD”, whenever possible, you should measure for the outside diameter in the middle of the spring because the end coils tend to run large.
3. Measure the body length.
   The body of an extension spring is considered the coiled portion. It does not include the hooks or loops. For larger springs you may use a ruler, but for smaller springs, using calipers or a micrometer is the preferred option.
4. Measure the overall length of the spring.
   This is the length over the top of each end or outside to outside.

Want to see how it’s done? Watch this step-by-step How to Measure Extension Springs video:

Once you have the dimensions for your extension spring, you can use our easy-to-use online form to request a  quote. Remember, if you have an unusual spring is not easy to measure, you can speak to a member of our team for identification and ordering assistance.