The end type of a compression spring is an element that affects the spring's performance, cost, and longevity. Different end types modify the spring's load-bearing capacities. For example, closed and ground end springs are often used in high-stress environments, providing stability. Knowing your project's particular needs is essential in choosing the correct end type. This article will guide you in identifying the appropriate spring end type for your unique project conditions.

Determine Best Mounting Scheme

The choice of a compression spring's end type is influenced by its intended use and mounting arrangements. If the end type chosen is not correct for the mounting style, the spring may fail to function properly.

If the spring design requires vertical stability and needs to interface directly with a flat surface, either squared or ground ends are suitable. This is because the flat finish of a ground end provides an increased area of contact with the surface, leading to an enhancement of the spring's stability and a reduction in potential movement.

Imagine the design of an industrial press that includes large vertically-oriented springs. In this situation, a spring with a ground end could benefit the functionality of the press by providing a firm attachment. Using a spring with a non-flat end, on the other hand, might interfere with the precise action of the press.

The examples provided here refer to typical cases, and specific project conditions may require a different end type. As such, it's necessary to examine your unique needs when deciding on the most suitable end type for a spring.

Compare Costs if Order Quantity is High

The production phase of springs requires different levels of labor, tools, and machinery, depending on the chosen end type of the spring. Manufacturing springs with specific ends, like squared or ground, generally incurs a higher cost than producing open-ended springs. This additional cost arises from the extra steps and accuracy needed to form the flat ends of squared or ground springs, steps that are not needed when fabricating open-ended springs. For example, the production of a flat-ended spring involves several operations such as cutting, squaring, and, sometimes, deburring. Maintaining the grinding equipment to create these flat ends also contributes to the total cost.

The costs related to the end type choice become evident when producing a large amount of units. Selecting a less costly end type can generate savings when considering the entire batch. However, this decision should factor in both the technical and economic aspects. Aligning input from engineers and finance professionals can balance the technical appropriateness of the end type and the cost savings. For example, for a project needing 10,000 springs where an open-ended spring performs as well as a more costly ground end spring, choosing an open-ended spring could lead to cost savings of up to 30%, assuming the cost difference is confirmed.

While cost considerations are substantial, the primary function of the spring should not be compromised. Any adjustments to the spring design to fit a different end type should not degrade the spring's primary function. For instance, in vehicle manufacturing, a spring employed in a suspension system must be robust and resilient to provide a steady vertical force. This requirement may mandate the use of a squared end type, despite a higher cost, because of its impact on the spring's lifespan.


Determining the right end type for your compression spring is a straightforward process. It mostly relates to your spring's mounting strategy and your project's budget, especially for larger orders. Utilizing advice from a spring manufacturer or design engineer can be beneficial, but you already have important information to avoid issues. The main goal is to choose a spring that fits its purpose and contributes positively to your design project.