Small changes in engineering can impact the performance and lifespan of a compression spring. Learning how to adjust springs can increase their functionality and durability. This article covers three modification methods - grinding, coil removal, and permanent mounting. Grinding adjusts the spring rate and load capacity. Coil removal tackles geometric constraints. Permanent mounting ensures the spring stays secure, providing steady performance. Using these techniques, a compression spring can fulfill its role in the mechanical system where it is used.


The process of modifying a compression spring often involves grinding, which focuses on refining the spring ends. The intention is to remove any rough surfaces or irregular features using an abrasive wheel. This action produces flat, uniform ends that can serve as reliable contact points when the spring is utilized within a mechanical instrument.

For a tangible example, look at a compression spring that is part of a vehicle's suspension system. An even spring end can foster improved shock absorption. In contrast, a spring end that isn't uniform may affect how the load is distributed and could expedite the wear or eventual breakdown of the component.

In executing grinding, maintaining precision is key. Grinding too much can lead to a decrease in the spring's load-carrying ability or cause it to have a shorter lifespan due to the creation of thinner spring ends. After the grinding process, it's necessary to verify the squareness of the spring relative to its axis. This is because a completely squared end supports the load distribution, reducing the chance of spring bowing or tilting under load, which directly aids in ensuring optimal operation.

Coil Removal

Coil removal can adjust a compression spring if its free length is too long, or if it is necessary to increase the spring rate. This method is valid when the spring's diameter and wire thickness comply with the initial design's parameters. For example, if a compression spring used in a mechanical seal is too long, removing extra coils at a specific location can achieve the required spring rate and free length. This will not damage the remaining spring and will ensure the proper functioning of the mechanical seal.

Yet, if the spring's diameter and wire thickness do not align with the original design, consider replacing the spring with a correctly sized one instead of cutting coils.

The spring's cut end is ground to create a level surface after cutting. Avoid high temperatures during the cutting process to maintain the spring's service life. If a high-speed cut-off wheel is used without adequate cooling, it may overheil the spring. Using a cooling method, such as water or compressed air spray during the cut-off operation, can prevent overheating.

After the coil removal, reevaluate the free length, spring rate, and load capacity of the spring to see if they fulfil the design criteria. This will ensure that the spring's functionality and performance are not compromised.

Permanent Mounting

Permanent mounting implies the procedure of firmly installing a compression spring at its working position. This method restricts the spring's movements. This might require you to weld the spring or secure it to a retaining bracket or case using implements such as bolts or rivets.

During welding, be aware that the heating process can alter the spring's material mechanics. Specifically, elevated temperatures may decrease the material's tensile strength and impact spring function. Therefore, welding should occur in a regulated temperature setting.

Besides, the choice of mounting method plays a role in the spring's long-term functionality. Misalignment at the mounting point may apply unbalanced forces on the spring, which could result in premature failure. Correct alignment during permanent mounting not only averts early malfunction but also maintains optimal spring function.


Adjusting a compression spring through proper grinding, coil removal, and correct mounting can enhance the spring's life and performance. Implementing these methods accurately can reduce operational interruptions in industrial contexts. Through strategic use of these techniques, you can maintain the spring's performance despite the required modifications. Of course if you're just experimenting and need a quick fix, feel free to go ahead and just clip, grind, or mount the ends as you see fit. Manual adjustment and modification of the spring should typically not be a regular occurrence, but can come in handy when needed for a machine.