Compression Springs Compression Springs

Enter your Outer Diameter and Free Length
Hint: For larger search results, enter a bigger range of Min and Max Inputs

Outer Diameter (in)
Outer Diameter
to
Inner Diameter (in)
Inner Diameter
to
Free Length (in)
Free Length
to
Wire Diameter (in)
Wire Diameter
to
Total Coils
Total Coils
to
Rate (lbs/in)
Rate
to
Material Type
Material Type
Max. Load (lbs)
Max. Load
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Max. Deflection (in)
Max. Deflection
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Solid Height (in)
Solid Height
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*Required Field
Extension Springs Extension Springs

Enter your Outer Diameter and Length Inside Hook
Hint: For larger search results, enter a bigger range of Min and Max Inputs

Outer Diameter (in)
Outer Diameter
to
Length Inside Hook (in)
Length Inside Hook
to
Wire Diameter (in)
Wire Diameter
to
Max. Load (lbs)
Max. Load
to
Max. Deflection (in)
Max. Deflection
to
Initial Tension (lbs)
Initial Tension
to
Rate (lbs/in)
Rate
to
Material Type
Material Type
*Required Field
Torsion Springs Torsion Springs

Enter your Outer Diameter and Total Coils
Hint: For larger search results, enter a bigger range of Min and Max Inputs

Outer Diameter (in)
Outer Diameter
to
Inner Diameter (in)
Inner Diameter
to
Total Coils
Total Coils
to
Free Position (deg)
Free Position
to
Wire Diameter (in)
Wire Diameter
to
Body Length (in)
Body Length
to
Wind Direction
Max. Torque (lbs)
Max. Torque
to
Max. Deflection (deg)
Max. Deflection
to
Rate (in-lbs/deg)
Rate
to
Leg Length (in)
Leg Length
to
Material Type
Material Type
*Required Field
Conical Springs Conical Springs

Enter you Small Outer Diameter, Large Outer Diameter and Free Length
Hint: For larger search results, enter a bigger range of Min and Max Inputs

Small Outer Diameter (in)
Small Outer Diameter
to
Large Outer Diameter (in)
Large Outer Diameter
to
Free Length (in)
Free Length
to
Rate (lbs/in)
Rate
to
Total Coils
Total Coils
to
Solid Height (in)
Solid Height
to
Wire Diameter (in)
Wire Diameter
to
Material Type
Material Type
*Required Field

Extension Spring Measurements - How to Measure an Extension Spring

diagram showing how to measure an extension spring


To measure your extension spring, you'll need to focus on the following dimensions:

  • Outer Diameter
  • Length Inside Hook
  • Wire Diameter
  • Inner Diameter

Please see graphic to the right for more help.

How to Measure Your Spring

Info how to measure extension springs

Feel free to visit our Free Online Extension Spring Calculator

Springs are accurately measured with a dial caliper. The reason for this is because a caliper provides you with a more exact measurement. Wondering why this is so important? Well, take your spring's wire diameter as an example. In most cases, if the spring's wire diameter is off by 0.001" it'll affect your spring's rate and travel so one must have exact measurements when measuring a spring.

Another thing one must focus on when it comes to their spring design is the spring's hook types. The hook types available are the following:

Machine Hooks These hooks are made from the last coils being bent out to form the hooks.

Extension spring with machine hook


Cross-over Center Hooks These hooks are made from the last coils of the spring as well but these bend out the full coil and then bend the bottom wire of the hook to to the center of the spring.

Extension sprong with cross-over-center hook


Side Hooks These hooks are the simplest hooks to create on a spring because the last coil is simply bent out from the end of the coil.

Extension spring with side hook


Extended Hooks These hooks are great for when the previously listed hooks don't work when being installed. (You may also have an extension spring with no hooks.

Extension spring with extended hook


How to measure a extension springHow to measure a extension spring

To measure your extension spring, you'll need to focus on the following dimensions:

  • Outer Diameter
  • Length Inside Hook
  • Wire Diameter
  • Inner Diameter

Please see graphic to the right for more help.

 

Info how to measure extension springsInfo how to measure extension springs

How to Measure Your Spring

Feel free to visit our Free Online Extension Spring Calculator

Springs are accurately measured with a dial caliper. The reason for this is because a caliper provides you with a more exact measurement. Wondering why this is so important? Well, take your spring's wire diameter as an example. In most cases, if the spring's wire diameter is off by 0.001" it'll affect your spring's rate and travel so one must have exact measurements when measuring a spring.

Another thing one must focus on when it comes to their spring design is the spring's hook types. The hook types available are the following:

Machine Hook Machine Hook

Machine Hooks These hooks are made from the last coils being bent out to form the hooks.

Crsoss Over HookCrsoss Over Hook

Cross-over Center Hooks These hooks are made from the last coils of the spring as well but these bend out the full coil and then bend the bottom wire of the hook to to the center of the spring.

Side HookSide Hook

Side Hooks These hooks are the simplest hooks to create on a spring because the last coil is simply bent out from the end of the coil.

Ectended HooksEctended Hooks

Extended Hooks These hooks are great for when the previously listed hooks don't work when being installed. (You may also have an extension spring with no hooks.