# Compression Spring Calculator Instructions

Spring Calculator Instructions

Attention! 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!

Attention! 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!

Attention! 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!

#### Step 1.

Choosing the end type of your spring can be critical.

##### Closed and Square Ends:

Most cost-effective and frequently used type of coil compression spring ends. Unless your coil compression spring needs to meet certain demands like having a shorter solid height, closed and squared ends are the leading option. In most cases closed and squared ends will stand upright.

##### Closed and Ground Ends:

Extra manufacturing labor is needed so this type of ends is not so cost-effective but it is also a frequently used type of coil compression spring end. It gives your coil spring more balance by helping it stand upright on a flat top. This type of ends will be beneficial in case your spring is too long in relevance with its outer diameter.

##### Double Closed Ends:

Double closed ends are basically closed ends with another closed coil added to them. These are also used to provide balance with springs that have large outer diameters and smaller wire diameters so the spring ends don’t protrude on top of each other when compressed. Double closed ends are more cost-effective than closed and ground ends.

##### Open Ends:

This type of ends is needed when you need your spring to travel or compress down to a shorter solid height, making it favorable to take the closed coils out. With this type of compression spring ends all coils are active and the spring will have to go over a mandrel or inside an orifice to be held in place.

#### Step 2.

This is where you input your compression spring measurements. The measurements needed are wire diameter, outer diameter, free length, active coils, and a material type. Once you have entered these values, you may click on “Calculate” and obtain the product of your coil spring design.

To calculate the active coils on your spring, you must subtract the number of closed coils from the number of total coils. For example, you have a spring with 8 total coils. If it has closed ends or closed and ground ends, you will subtract 2 coils from the eight total coils and get a result of six active coils. Furthermore, if this spring has double closed ends, you will subtract four closed coils from the eight total coils and get a result of four active coils.

Our coil compression spring calculator also grants you various types of material or wire types. Material types have different tensile strengths and some are individually used for certain demands such as environments with high temperatures or with a certain level of moisture or corrosion. If your spring isn’t being placed in harsh conditions and you don’t need any special demands, music wire is the best and most cost-effective option.

#### Similar Stock Springs and Closest Stock Spring

As you design your compression spring, Spring Creator will examine our extensive coil spring catalogue to determine if your spring is available for instant acquisition. We can also provide you with the nearest spring in stock to get some advancement in prototyping stages, saving you money and time.

#### Step 3.

Here is where you see your calculated answers of your coil compression spring design. From the most minimal specification, like inner diameter or the space between the coils (pitch), to the most imperative specifications like spring rate, maximum load considering solid height, or maximum travel considering solid height. You will find it all using Spring Creator.

##### Safe Travel:

This category gives you information representing how much you will be able to travel or squeeze your coil compression spring. You are also given two different values here; true maximum travel and maximum travel considering solid height. Like load, maximum travel considering solid height is the travel you will get out of your actual design while true maximum travel is a potential amount of travel your spring may accomplish if you increment the coil spring’s free length.

##### Physical Dimensions:

Ok you’ve input some of your spring’s physical dimensions in step 2 but here you are given some more detailed information respecting your spring’s physical dimensions. The additional dimensions provided are inner diameter, mean diameter, total coils, solid height, spring index, distance between coils (pitch), and the rise angle of coils. Mean diameter is the diameter in between your spring’s inner and outer diameters (from center of wire to center of wire) and it is used along with the wire diameter to calculate spring index. Spring index is the proportional ratio between your spring’s outer diameter and its wire diameter. This helps to determine the level of manufacturing difficulty of your spring. Total coils are the overall coils of your spring, active and non-active. Total coils help to calculate the solid height of your spring which is the height of a coil spring when it is completely compressed and all the coils are in contact. The pitch is the distance between your spring’s uncompressed active coils. The rise angle of coils is the diagonal angle your spring’s coiled wires compose in order to implement that pitch.

##### Material Type:

This area shows the material type you picked your spring design to be made of.

##### Weights and Measures:

This section show you the weight of one spring or of one thousand springs as well as how many inches of wire your spring requires to be made. This section will help in the manufacturing phase of your helical compression spring as well as the shipping phase.

#### Step 4.

This section helps to give you specific warnings representing your spring design as well as giving you tips on how to make modifications or improvements so that you have a good spring design. You are also given our force chart in case you require your spring to be stronger or weaker. For more force, you would have to make the outer diameter smaller, take some coils out, thicken the wire diameter, or add more travel by augmenting the coil spring’s free length. To make your spring weaker, you would have to do the contrary; make the outer diameter larger, add some coils, thin out the wire diameter, or make less travel for your load by making the free length shorter. The warnings and tips (solutions) you might get are the following:

Warning: Your index is too small (below 4) which makes it difficult to manufacture.

Tip: In order to increase your index you will need to increase your outer diameter or decrease your wire diameter.

Warning: Your index is too large (above 15).

Tip: In order to decrease your index you will need to decrease your outer diameter or increase your wire diameter.

Warning: Your free length is less than or equal to your solid height.

Tip: You have entered a free length that is not possible based on your other inputs. To fix this, here are some options: increase the free length, decrease the number of coils, or decrease the wire size.

Warning: The force in L2 is less than the force in L1.

Tip: If you need to travel a certain distance that takes you beyond the max safe travel, here are some options: increase huber of coils, increase outer diameter, or increase wire diameter.

Tip: If you need to reach a load that takes you beyond the max load, you ned to change your input values. Here are some options: increase the number of coils, increase outer diameter, or decrease wire diameter.

Warning: Loaded height / solid height conflict.

Tip: 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.

#### Step 5.

Pick a load that in between the limits of the minimum and maximum loads below. Once you’ve picked a load or loaded height, the unidentified value will be calculated in an automatic manner when you hit the tab key or click on calculate.

#### Step 6.

##### Generate Blueprint:

Click this and you will receive a real time blueprint of your exact spring design which is editable. You will have a perfect spring blueprint ready for manufacture. The editable fields you can include on this blueprint are: Part Name, Part Number, Drawing #, Drawn By, Revision#, Tolerances, Approved By, Finish (plating) and Manufacturing Notes. Once you’ve edited your blueprint, click on “Update Blueprint” and all the sections that you’ve edited will be renewed and reflected on your blueprint.

##### Get a Quick Quote of Your Spring Design:

This feature lets you quickly send us a quotation. The spring blueprint will automatically be attached to the quote.

##### Email Design & Blueprint:

Once you’re pleased and satisfied with your blueprint, click on the “Email Design & Blueprints” and email the PDF blueprint directly to yourself, colleagues, and potential clients without leaving the Spring Creator App, incrementing efficiency and productivity.

##### Similar Springs in Stock:

This link shows you related springs and the nearest spring in stock to your design that is waiting for purchase. As you design your spring, Spring Creator will explore our extensive spring catalogue to determine if your spring is accessible for instant purchase. This will aid you in the prototyping and testing stages, saving you time and money.