Compression Stainless steel 0.3- 2mm Wire Dia Pressure Coil Springs Length 180mm

Wire diameter directly controls spring stiffness (spring rate) and load capacity. Thinner wire (0.3–0.6 mm) suits light-duty applications such as small electronics, pen mechanisms, or delicate return springs. Mid-range wire (0.7–1.2 mm) covers general mechanical assemblies, jigs, and fixtures. Heavier wire (1.4–2.0 mm) is appropriate for higher-load applications like pneumatic valves or industrial tooling. When in doubt, calculate the required spring rate from your load and deflection requirements, then select accordingly.

For a guide rod application, the spring's inner diameter (ID) must be slightly larger than the rod diameter to allow free movement. ID is approximately equal to the outer diameter minus twice the wire diameter. For a bore application, the spring's outer diameter should be slightly smaller than the bore to prevent binding. Measure your rod or bore carefully and select the outer diameter variant that gives 0.5–1.0 mm clearance on each side.

Yes. Stainless steel offers significantly better corrosion resistance than carbon steel or music wire springs. These springs are suitable for humid workshops, light outdoor enclosures, and applications with occasional water exposure. For continuous immersion or aggressive chemical environments, verify the specific stainless alloy grade meets your requirements before use.

Compression springs can be cut shorter, but doing so changes the spring rate and may leave an open, unground end that seats unevenly. If you need a specific free length shorter than 180 mm, cutting is possible with a rotary tool or spring cutter, followed by light grinding to re-square the end. For critical applications, it is better to select a spring closer to your target length from the outset.

For prototyping or one-off repairs, the 1- or 2-piece options keep costs low. For workshop stock or production runs where you need spares on hand, the 5-, 10-, or 25-piece packs offer a lower per-unit cost and reduce reorder frequency. Consider ordering at least 2–3 extra pieces for any critical application to account for testing and potential failures during setup.

A compression spring resists being compressed — it pushes back when you squeeze it. An extension spring resists being stretched — it pulls back when you elongate it. Compression springs typically have open or squared ends and no initial tension, while extension springs have hooks or loops at each end and are wound with initial tension. These listings are compression springs; use them where you need a pushing or return force when the spring is compressed along its axis.

Yes. The fine wire diameter options (0.3–0.8 mm) and small outer diameters (3–8 mm) are well-suited for 3D printer extruder tensioners, bed leveling assemblies, and small robotic joints. The consistent 180 mm free length means you can cut to size or use as-is for longer travel mechanisms. Stainless steel construction also avoids the rust contamination risk that can occur with carbon steel springs in enclosed printer enclosures.