Spring Steel Compression Spring Pressure Coil Spring Wire 0.6mm OD 3-12mm Shop

Measure the inner diameter of your spring housing or bore, then select an OD that provides a small clearance fit — typically 0.1mm–0.3mm smaller than the bore ID. For free length, choose a spring that is longer than your required compressed height to ensure adequate preload and travel. Use the Size option above to browse all available OD × Length combinations.

The load capacity depends on the OD, free length, and number of active coils. Smaller OD springs with shorter free lengths typically handle lighter loads in the range of a few Newtons, while larger OD and longer springs can handle proportionally higher forces. For precise spring rate and load data, contact us with your specific size selection.

Spring steel provides good mechanical properties but has limited inherent corrosion resistance compared to stainless steel. For indoor, dry, or low-humidity environments these springs perform reliably. For outdoor, wet, or chemically exposed environments, consider applying a light protective coating or selecting a stainless steel alternative.

These compression springs are compatible with any spring seat, pocket, or housing that matches the selected OD. Common applications include robotics joints, 3D printer extruder mechanisms, electronic switch assemblies, valve actuators, latches, and custom DIY fixtures. No special tools are required for installation — springs can be seated by hand or with standard assembly fixtures.

The 10 PCS pack is ideal for prototyping, testing fit and function, or low-volume repair work. The 100 PCS bulk pack offers a lower per-unit cost and is suited for production runs, workshop stocking, or projects requiring multiple springs of the same size. Both pack sizes ship the identical spring — only the quantity differs.

Spring steel is well-suited for moderate to high-cycle applications where the spring operates within its elastic range. Avoid compressing the spring to solid height (coil bind) during normal operation, as this accelerates fatigue. For very high-cycle or safety-critical applications, verify the spring rate and stress levels against your design requirements before committing to a production quantity.

The Outer Diameter (OD) is the overall outside measurement of the coil. The Inner Diameter (ID) is approximately OD minus twice the wire diameter — for a 0.6mm wire spring, ID ≈ OD − 1.2mm. For example, a 5mm OD spring has an ID of approximately 3.8mm. Use the OD when sizing for a housing bore, and the ID when sizing for a shaft or mandrel that the spring slides over.