**Calculator Instruction Video**

**Step 1. Choose your end type.**

Pick from:

Closed and Square

Closed and Ground

Double Closed Ends

Open Ends

**Step 2. Enter your spring dimensions**

Select your unit of measure: English or Metric

Inputs Needed:

Wire Diameter

Outer Diameter

Free Length

Active Coils

Select your material type (15 types to choose from)

Click Calculate

**Step 3. Enter your working loads**

This step is optional but recommended:

Choose a load that is within the limits of the

minimum and maximum possible loads below. Once

you choose a load or loaded height the unknown

value will be calculated for you when you hit

tab or click on calculate button.

**Step 4. Warnings and helpful tips:**This is an automatic

feature that works when you hit calculate or enter a

working load. It will give you warning messages

and helpful tips to correct your spring design.

**Warnings include:**

The force in L2 is less than the force in L1

Your loaded height exceeds the maximum safe travel

Your load exceeds the max safe load

Loaded Height / Solid Height Conflict

Your index is too small (below 4)

Your index is too large (above 15)

Your Spring May Buckle

Your Free Length is less than your solid height

**Helpful tips include:**

Your L2 must be greater than your L1. The formula

for load is rate x distance traveled = load.

Thus if your distance traveled for L2 is greater

than L1, your load at L2 must be greater.

If you need to travel a certain distance that

takes you beyond the max safe travel here are some

options: increase number of coils, increase the

outer diameter, or increase the wire diameter

If you need to reach a load that takes you beyond

the max load you need to change your input values

here are some options:increase the number of coils,

increase the outer diameter, or increase the wire

diameter.

Your loaded height cannot exceed your solid height.

To solve this problem here are some options: readjust

your loaded height, decrease your number of active

coils, or decrease your wire diameter.

In order to increase your index you will need to

increase your outer diameter or decrease your wire

diameter.

In order to decrease your index you will need to

decrease your outer diameter or increase your wire

diameter.

If your spring is not placed in a hole or over a

shaft and has a free length divided by mean diameter

greater than 4, you run the risk of the spring

buckling while being compressed. To fix this

problem here are some options: place the spring over

a shaft or in a hole, increase the wire diameter,

or shorten the free length

You have entered a free length that is not possible

based on you other inputs. To fix this here are

some options: increase the free length of the spring,

decrease the number of coils, or decrease the wire size.

**Step 5. Review your answers**

You’ll get all the technical spring information like:

Loads & Rates:

True Maximum Load

Maximum Load Considering Solid Height

Spring constant (or Spring rate)

Safe Travel:

True Maximum Travel

Maximum Travel Considering Solid Height

Physical Dimensions:

Diameter of spring wire

Outer diameter of spring

Inner diameter of spring

Mean diameter of spring

Free length of spring

Number of active coils

Number of total coils

Solid height

Type of ends

Spring index

Distance between coils

Rise angle of coils

Material Type

Weights & Measures

Weight of one spring

Weight per one thousand springs

Length of wire required to make one spring

Stress Factors:

Material shear modulus

Maximum shear stress possible

Wahl correction factor

Suggested Part Number

**Step 6. Generate Blueprint:**

This feature gives you a real-time working blueprint

of your spring, this is an exact blueprint of your

spring. Scroll to the bottom of this page to customize

your blue print with your company logo. Edit part name

& number as well tolerances, finishes and print revisions

and add mfg notes. You can also convert the blueprint to PDF,

as well as open or save the file with just one click.

Save to computer: Downloads a PDF file to your computer.

Print Design and Blueprint: Print the design and blueprint

Email design and Print: Send the spring design and blueprint

to your client or send to 3 different receivers with just

one click.