Compression Spring Steel 1.4mm - 2mm Wire Dia 15mm Length Small Pressure Springs

Measure the bore or seat that will house the spring. The spring's outer diameter should be slightly smaller than the bore (typically 0.5–1mm clearance) to allow free movement without binding. If you are using a guide rod inside the spring, ensure the inner diameter of the spring is larger than the rod diameter. Select your outer diameter from the Diameter variant option above.

Stainless steel (304) offers good corrosion resistance and is suitable for humid, wet, or mildly corrosive environments. Spring steel (carbon steel) has a higher modulus of elasticity, meaning it can store more elastic energy per unit of deflection and typically has a higher spring rate for the same geometry. Choose spring steel for higher-load mechanical applications in dry environments, and stainless steel where moisture or oxidation is a concern.

A thicker wire diameter increases the spring rate (stiffness) and load capacity for a given outer diameter and free length. If you need a stiffer spring that resists compression more firmly, select a larger wire diameter. If you need a softer spring with lighter return force, choose a smaller wire diameter. All wire diameter options in this listing share the same 15mm free length.

The stainless steel (304) variants provide good resistance to atmospheric corrosion, light moisture, and mild chemical exposure. They are suitable for outdoor use in most non-marine environments. Spring steel variants are not recommended for prolonged exposure to moisture without additional protective coating, as they may oxidize over time. For marine or highly corrosive environments, contact us to confirm suitability.

Yes. These compression springs are commonly used in 3D printer bed leveling systems, robotic joint return mechanisms, linear actuator preloading, and electronic switch actuation. Select the outer diameter and wire diameter that match your design's spring seat and required force. For robotics and automation, the spring steel variants are often preferred for their higher elastic energy storage.

For initial prototyping and fit verification, the 3-piece or 5-piece packs allow you to test the spring in your assembly before committing to larger quantities. For production runs, small-batch manufacturing, or maintaining a spares inventory, the 10-piece packs offer better value per unit. Select your preferred quantity from the Material Selection & Qty variant option above.

Spring force is calculated as F = k × x, where k is the spring rate (N/mm) and x is the deflection distance (mm). The spring rate depends on wire diameter, outer diameter, free length, and number of active coils. If you need the exact spring rate for a specific variant, contact us to confirm. As a general guide, larger wire diameters and smaller outer diameters result in higher spring rates for this 15mm free length series.