Spring Index Solution

STEP 0: Pre-Calculation Summary
Formula Used
Spring Index = Mean Coil Diameter of Spring/Diameter of spring wire
C = D/d
This formula uses 3 Variables
Variables Used
Spring Index - Spring Index is defined as the ratio of mean coil diameter of the spring to the diameter of the spring Wire.
Mean Coil Diameter of Spring - (Measured in Meter) - The Mean Coil Diameter of Spring is defined as the average of the inner and the outer diameters of a spring.
Diameter of spring wire - (Measured in Meter) - Diameter of spring wire is the diameter of the wire of which a spring is made.
STEP 1: Convert Input(s) to Base Unit
Mean Coil Diameter of Spring: 36 Millimeter --> 0.036 Meter (Check conversion here)
Diameter of spring wire: 4 Millimeter --> 0.004 Meter (Check conversion here)
STEP 2: Evaluate Formula
Substituting Input Values in Formula
C = D/d --> 0.036/0.004
Evaluating ... ...
C = 9
STEP 3: Convert Result to Output's Unit
9 --> No Conversion Required
FINAL ANSWER
9 <-- Spring Index
(Calculation completed in 00.004 seconds)

Credits

Created by Kethavath Srinath
Osmania University (OU), Hyderabad
Kethavath Srinath has created this Calculator and 1000+ more calculators!
Verified by Urvi Rathod
Vishwakarma Government Engineering College (VGEC), Ahmedabad
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9 Geometry of Helical Springs Calculators

Diameter of Spring Wire from Load Stress Equation
Go Diameter of spring wire = sqrt(Wahl Factor of Spring*(8*Axial Spring Force*Spring Index)/(pi*Shear Stress in Spring))
Spring Index given Shear stress in Spring
Go Spring Index = Shear Stress in Spring*(pi*Diameter of spring wire^2)/(Wahl Factor of Spring*8*Axial Spring Force)
Mean Coil Diameter of Spring
Go Mean Coil Diameter of Spring = (Outer Diameter of Spring Coil+Inner Diameter of Spring Coil)/2
Inside Diameter of Spring Coil given Mean Coil Diameter
Go Inner Diameter of Spring Coil = 2*Mean Coil Diameter of Spring-Outer Diameter of Spring Coil
Outside Diameter of Spring given Mean Coil Diameter
Go Outer Diameter of Spring Coil = 2*Mean Coil Diameter of Spring-Inner Diameter of Spring Coil
Total Number of Coils given Solid Length of Spring
Go Total Coils in Spring = Solid Length of Spring/Diameter of spring wire
Diameter of Spring Wire given Spring Index
Go Diameter of spring wire = Mean Coil Diameter of Spring/Spring Index
Mean Coil Diameter given Spring Index
Go Mean Coil Diameter of Spring = Spring Index*Diameter of spring wire
Spring Index
Go Spring Index = Mean Coil Diameter of Spring/Diameter of spring wire

Spring Index Formula

Spring Index = Mean Coil Diameter of Spring/Diameter of spring wire
C = D/d

Define a Spring?

A spring is an elastic object that stores mechanical energy. Springs are typically made of spring steel. There are many spring designs. In everyday use, the term often refers to coil springs. The rate or spring constant of a spring is the change in the force it exerts, divided by the change in deflection of the spring.

How to Calculate Spring Index?

Spring Index calculator uses Spring Index = Mean Coil Diameter of Spring/Diameter of spring wire to calculate the Spring Index, The Spring Index formula is defined as the ratio of mean coil diameter of the spring to the diameter of the spring Wire. Spring Index is denoted by C symbol.

How to calculate Spring Index using this online calculator? To use this online calculator for Spring Index, enter Mean Coil Diameter of Spring (D) & Diameter of spring wire (d) and hit the calculate button. Here is how the Spring Index calculation can be explained with given input values -> 9 = 0.036/0.004.

FAQ

What is Spring Index?
The Spring Index formula is defined as the ratio of mean coil diameter of the spring to the diameter of the spring Wire and is represented as C = D/d or Spring Index = Mean Coil Diameter of Spring/Diameter of spring wire. The Mean Coil Diameter of Spring is defined as the average of the inner and the outer diameters of a spring & Diameter of spring wire is the diameter of the wire of which a spring is made.
How to calculate Spring Index?
The Spring Index formula is defined as the ratio of mean coil diameter of the spring to the diameter of the spring Wire is calculated using Spring Index = Mean Coil Diameter of Spring/Diameter of spring wire. To calculate Spring Index, you need Mean Coil Diameter of Spring (D) & Diameter of spring wire (d). With our tool, you need to enter the respective value for Mean Coil Diameter of Spring & Diameter of spring wire and hit the calculate button. You can also select the units (if any) for Input(s) and the Output as well.
How many ways are there to calculate Spring Index?
In this formula, Spring Index uses Mean Coil Diameter of Spring & Diameter of spring wire. We can use 1 other way(s) to calculate the same, which is/are as follows -
  • Spring Index = Shear Stress in Spring*(pi*Diameter of spring wire^2)/(Wahl Factor of Spring*8*Axial Spring Force)
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