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!

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!

End Types in Compression Springs

End Types in Compression Springs.

Compression springs come in all shapes and sizes, and their end types also vary. The ends in compression springs can be adjusted to enhance stability and placement of the spring. It is important to understand the differences and benefits that each end type provides so that you can select the correct one for your device.

Select the right compression spring with these end types in mind:

Closed and Squared Ends in Compression Springs

Closed and squared ends are the most popular type of ends in compression springs. These type of ends allows your spring to stand vertically when placed on a flat surface since the last coil on the ends is closed at the time it is being manufactured on the coiling CNC machine.

Closed and end squares are also the most economical type of ends because they do not require extra material or an additional process to complete. This allows makes them accessible and widely common in all types of applications. However, if your spring has a high slenderness ratio and you select closed and square ends it will need to be placed inside a shaft or placed on a rod for it to not bend or buckle.

closed and squared compression spring end type example

Closed and Ground End Type for Compression Spring

Closed and ground ends are the second most common type of end. However, these do have a higher cost per piece as it requires additional work to be done on each spring in order for the ends to be ground. When the springs come off the CNC machine it will be a normal compression spring with closed and squared ends. The coiler must then take the springs and place each on a different machine that is specifically for grinding the ends on each spring and must then adjust the settings on the machinery to ensure the grinding is completed correctly for the size of such springs.

Since the grinding of the ends on compression springs is additional to the normal manufacturing process, it not only increases the price but also time it takes to complete the order. However, if you need your spring to stand straight and vertically on a flat surface without a shaft or rod, and the slenderness ratio permits this, then this is a good option.

closed and ground compression spring end type example

Double-Closed End Type in Compression Spring

Double closed ends are somewhat similar to closed and squared ends. The difference is that instead of the spring having one closed coil at the ends, it has two, hence the word double in its title. This end type can be manufactured directly from the machine by creating a process similar to that of extension and torsion springs where all of its coils are touching. This, however, does require additional set up and extra wire and so it will increase the price of the spring. These end types are common when stability is of vital importance and the slenderness ratio is high and requires the assistance of a more stable and reinforced end in order to prevent buckling. Depending on the size of the spring this option can be more economical compared to a closed and ground end type.

double closed compression spring end type example

Open End Type for Compression Springs

Open ends the least common of all end types in compression springs. This is because the open ends make do not allow the spring to stand or be stable without the assistance of a rod inside it. In a compression spring with open ends, all of the coils are open which means they all have pitch in between them.

These types of ends are used the spring needs to be weaker but space does not permit more coils to and therefore this type of end helps you avoid having to increase the solid height. Making the ends of the spring open would normally require adding two more coils but if you don’t have space for it you can choose an open-end type. This makes your spring weaker while keeping the solid height. However, you need to keep in mind that placing the spring in a shaft or having a rod inside it will be required in order to keep the spring in place.

open compression spring end type example

Each end type facilitates and enhances the performance of the spring based on different requirements, so make sure you understand what the vital requirements of your spring are before selecting a spring type. If you need further assistance regarding the selection of the spring you want to purchase with us, or if you would like to purchase directly over the phone with a selection specialist, you can contact us at (951) 276-2777