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
to
Max. Deflection (in)
Max. Deflection
to
Solid Height (in)
Solid Height
to
*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

Coil Spring Solid Height

Definition - The height of a spring when it is fully compressed and all of its coils are touching one another. At this point no more force/energy can be gathered by the spring.

 

When a load is placed on a coiled spring causing it to compress, it gathers force and energy. After the load is removed, this gathered energy causes the spring to extend back to its original length. This is known as memory.

 

The distance from the free length to solid height is known as distance traveled. Distance traveled is the length of deflection that a spring is able to perform.

 

For example:

 

Let’s say you have a spring with a 1” (inch) free length and a solid height of 0.25” (inches). The distance traveled from free length to solid height is of 0.75” (inches). You solve this by subtracting the solid height from the free length thus getting the potential distance of travel.

 

Why do we say potential distance of travel?

 

Compression springs have an elastic limit based on their physical dimensions. If a compression spring is too stressed (too strong), it might not be able to deflect down to solid height. When a coil spring is very light you can get more travel by extending the free length, and still be able to compress it down to solid height.

 

Free Length Solid HeightFree Length Solid Height

 

To Calculate Solid Height for Closed and Squared, Double Closed or Open Ends

 

Solid Height is based on two of your spring’s dimensions; wire diameter and total coils. To calculate this dimension, you must add 1 to the total coils and multiply the result by the wire diameter. The reason we add one is to account for the additional wire to not included in the to the total coil count. This is only for closed and square ends, double closed ends, and open ends. The formula below as well as the diagram to the right show how it works.

 

Sh = (Tc + 1) x WD
Solid Height = (Total Coils + 1) x Wire Diameter

 

For example:

 

In this scenario we have a spring with a 0.5” (inch) wire diameter and 4 total coils. We added 1 wire to the 4 coils, this gives us 5, which we multiplied by 0.5 and we get 2.5 as a result. The solid height of this spring would be 2.5 inch.

 

Sh = (Tc + 1) x WD
Sh = (4 + 1) x 0.5
Sh = 5 x 0.5
Sh = 2.5 inch.

Solid Height Formula Closed EndsSolid Height Formula Closed Ends

 

To Calculate Solid Height - Ground Ends

 

When a spring’s ends are ground, you are taking off half of the wire diameter on each end, therefore the solid height will be shorter. Due to this there is no need to add the additional wire diameter. To calculate this dimension on a spring with ground ends, you would simply multiply the total coils by the wire diameter as shown in the formula below.

 

Sh = Tc x WD
Solid Height = Total Coils x Wire Diameter

 

For example:

 

Take the same spring with a 0.5” (inch) wire diameter and 4 total coils. The solid height of this spring would be 2” since we multiplied 0.5.

 

Sh = Tc x WD
Sh = 4 x 0.5
Sh = 2

Solid Height Formula Ground EndsSolid Height Formula Ground Ends