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Calculating Constant Force on a Coil Compression Spring

Definition

The calculation of the amount of constant force it takes a coil compression spring to compress down to a loaded height is calculated by multiplying the force by the distance the coil compression spring is expected to travel. The unit of measurement for constant force is lbf/in which stands for pounds of force per inch.

 

Compression Springs Compression Springs

Input results shown will be +/- 10% from middle value
Hint: The closer your min and max inputs are, the more accurate your results will be!

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

Input results shown will be +/- 10% from middle value
Hint: The closer your min and max inputs are, the more accurate your results will be!

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

Input results shown will be +/- 10% from middle value
Hint: The closer your min and max inputs are, the more accurate your results will be!

Outside Diameter
to
Inside Diameter
to
Total Coils
to
Free Position
to
Wire Diameter
to
Body Length
to
Max. Torque
to
Max. Deflection
to
Rate
to
Leg Length
to
Material Type
*Required Field

 

The above compression spring calculator will help you make these coil compression spring calculations. Not only will you see the results of your coils spring’s rate or constant but you will also see the safe maximum amount of load you will be able to place on your coil spring as well as the maximum travel considering solid height. Most of the time, you will be able to travel safely down to your coil compression spring’s solid height but there are times that your spring design will not safely travel that far. This is due to the spring’s physical dimensions (too little coils or a small index) and the elasticity of the spring wire.

 

Example:

A spring of 12” (inches) has to travel 5” to a loaded height of 7” with a load or force of 5 lb. (pounds).

k = F ÷ x
k = 5 ÷ 5
k = 1 lbf/in (pounds of force per inch)


F = Force
x = Distance Traveled
k = Constant or Rate

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Created by Alfonso Jaramillo Jr

President Acxess Spring

Over 40 Years of Experience in Spring Engineering and Manufacturing