Conical Compression Spring Tapered Spring Steel Wire 0.2-3mm Heavy Duty Cone DIY

Match four dimensions to your application: wire diameter (determines stiffness and load capacity), large-end outer diameter (must fit inside your housing or seat), small-end outer diameter (must clear your guide pin or shaft), and free length (determines available travel before coil bind). Start with the variant size closest to your existing spring or pocket dimensions, then verify the collapsed solid height meets your minimum clearance requirement.

A conical spring can collapse to a solid height equal to approximately one wire diameter because the smaller coils nest inside the larger ones. This makes it ideal for applications with very limited axial space. The tapered geometry also provides a naturally progressive spring rate — the rate increases as the spring compresses — which is useful for applications that need soft initial travel and firmer resistance near full compression.

These springs are formed from carbon steel spring wire and are suitable for light-to-medium duty mechanical applications such as throttle returns, valve mechanisms, latch assemblies, and jig fixtures. For heavy-duty automotive valve train or high-cycle industrial applications, please verify the specific wire diameter and free length variant against your load and fatigue requirements before ordering.

The springs are made from bare carbon steel with a natural finish and are not corrosion-resistant on their own. They are suitable for dry or lightly lubricated indoor environments. For outdoor, humid, or chemically exposed applications, consider applying a light coat of machine oil or grease, or use a corrosion-inhibiting spray after installation. Prolonged exposure to salt water or strong acids is not recommended without additional protective treatment.

Each size variant is listed in the format: Wire Diameter × Small-End OD × Large-End OD × Free Length, all in millimeters. For example, "0.6mm × 6mm × 9mm × 22mm" means the wire is 0.6 mm thick, the small end outer diameter is 6 mm, the large end outer diameter is 9 mm, and the uncompressed free length is 22 mm. Use these four values to match the spring to your application pocket and travel requirements.

Yes. The smaller wire diameter variants (0.2 mm – 0.6 mm) are well-suited for 3D-printer bed leveling assemblies, nozzle pressure compensation mechanisms, and PCB button or latch mechanisms. The near-flat collapse height is particularly useful in thin electronics enclosures where a standard cylindrical spring would be too tall when compressed.

For single-unit repairs or prototyping, a pack of 1–5 PCS is usually sufficient. If you are building a small batch of assemblies or want spares on hand, packs of 10–50 PCS offer better per-unit value. For production runs or bulk stocking, the 100 PCS packs provide the lowest per-piece cost. Select the quantity that matches your project scale using the Quantitys option above.