search
Loading...

Coil Torsion Spring Calculator

Compression Springs Compression Springs

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

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

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

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

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

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

Definition: Torsion spring design tool used to calculate the rotational force exerted from its coils; torque is the moment of a force that causes the rotational deflection of its legs.

Use our coil spring torque calculator to calculate your torsion spring's torque values as well as tolerances like maximum deflection and maximum torque. The torque values are based on your torsional spring's rate per degree which is derived from your spring's physical dimensions and material type.

Coil torsion spring torque is easily calculated if you know your spring's rate and one of the torque values; force exerted on spring or degrees of deflection. When you determine the force being applied on your spring, you must consider the length of the moment arm. The moment arm is the torsion spring leg that will be in motion while the other will be stationary. The longer your moment arm is beyond 1” (one inch), the stronger your spring will need to be in order to accomplish the required torque. The formulas to calculate torque are the following.

To Calculate Torque (F):

Torque (F) = Moment Arm (M) x Force (P)


F = MP

How To Measure Torsion Spring How To Measure Torsion Spring

To Calculate Working Torque (Amount of Force @ Amount of Degrees Traveled)

Formula A.)

Deflection (Deg) = Torque (F) ÷ Rate (k)


Deg = F ÷ k

Formula B.)

Torque (F) = Rate (k) x Deflection (Deg)


F = kDeg

Torsion Spring TorqueTorsion Spring Torque

Once you've managed to use these formulas, you might see that maybe you're not meeting either the deflection or torque you're required to meet. By following the provided force chart, you are able to know how you can get your spring to have more or less force. For more force, you may increase the wire diameter, decrease the outer/inner diameter, or take out some coils. For less force, you may decrease the wire diameter, increase the outer/inner diameter, or add some coils. These adjustments will also affect the maximum spring deflection limit, though. The stronger your spring is, the more stressed. This is where you might want to take a look at your spring index which you can calculate by subtracting one wire diameter from the outer diameter (or adding one wire diameter to the inner diameter) and dividing the result (mean diameter) by the wire diameter itself. Spring index is the proportional ratio between your spring's diameter and wire diameter. This specifies the tightness of the coils. The lower the torsion spring index, the tighter the coils thus generating more stress upon the spring. Make sure that you check the spring's limitations and how much it will be able to do for your application before actually getting them manufactured because exceeding these limits may cause your spring to take a permanent set thus losing torque.

Force Chart TorsionForce Chart Torsion

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!

Spring Creator tool - Try it now

Created by Alfonso Jaramillo Jr

President Acxess Spring

Over 40 Years of Experience in Spring Engineering and Manufacturing