How to Choose the Right Compression Spring
How to Choose the Right Compression Spring
1. Spring Material
Stainless Steel (SUS304, SUS301, SUS316, SUS631): Corrosion-resistant, suitable for outdoor or humid environments.
Music Wire (SWC): High tensile strength, commonly used for general industrial applications.
Oil-Tempered Wire (Silicon-Chrome Alloy Steel): Excellent elasticity, fatigue resistance, and wear resistance; ideal for heavy-load springs.
Phosphor Bronze / Beryllium Copper: Excellent electrical conductivity, suitable for electronic devices.
Special Alloys (e.g., Inconel, Hastelloy): Suitable for high-temperature and highly corrosive environments.
2. Wire Diameter and Outer Diameter
Affect spring stiffness and load capacity.
The thicker the wire, the higher the spring stiffness.
3. Free Length and Compression Stroke
Free length should be determined based on the required compression range in the application.
Ensure sufficient travel to avoid excessive compression, which may cause permanent deformation.
4. Number of Coils and Coil Pitch
Influence overall elasticity and deformation behavior.
For longer travel requirements, a higher number of coils is recommended to increase flexibility.
5. Maximum Working Load and Compression Height
Ensure that the stress under maximum compression does not exceed the material’s allowable limit to prevent failure.
6. Installation Space Constraints
Confirm that the spring has adequate room to compress and expand during assembly.
Consider guide mechanisms to prevent buckling or misalignment during operation.
7. Operating Environment
For high temperature, corrosive, oily, or humid environments, choose appropriate materials and surface treatments (e.g., zinc plating, black oxide, rust preventive oil).
