Compression Spring Spring Steel Pressure Coil 1.5mm Wire OD 8-25mm 5-100mm Heavy

Measure the bore or housing your spring sits in — the spring OD should be 0.5–1mm smaller than the bore for free movement. For free length, measure the uncompressed gap the spring must fill. Select the variant whose OD and free length match those measurements from the dropdown above.

A 1.5mm wire diameter is considered heavy-duty for springs in the 19–30mm OD range. Typical working loads vary by free length and OD, but these springs are suited for firm return-force and light clamping applications. For precise load calculations, use the spring rate and deflection data for your specific variant.

These springs are made from spring steel with a protective surface treatment that provides resistance to light moisture and workshop humidity. For outdoor or wet environments, consider adding a light coat of machine oil or selecting stainless steel springs for your application.

No — these are designed specifically as compression springs with closed and ground ends. They are not suitable for extension (tension) applications. Using them in tension can cause permanent deformation or failure.

OD (Outer Diameter) is the full outside width of the coil. ID (Inner Diameter) equals OD minus twice the wire diameter — for a 1.5mm wire and 20mm OD spring, the ID is approximately 17mm. Wire diameter is the thickness of the steel wire itself. Always match OD to your bore and ID to your guide rod if applicable.

Each order includes 10 springs of your selected size. This is ideal for stocking spares, replacing multiple springs in a machine, or building assemblies that require matched sets.

Yes — the consistent coil pitch and predictable spring rate make these compression springs well-suited for DIY automation, 3D printer bed leveling mechanisms, robotic gripper return systems, and similar maker projects where repeatable force is important.