Length 300mm Compression Spring Steel 0.3 - 1.6mm Wire Dia Pressure/Coil Springs

Select the wire diameter based on the load you need to support — thicker wire (e.g., 1.2–1.6 mm) handles heavier loads, while thinner wire (0.3–0.6 mm) suits light-duty return mechanisms. The outer diameter must fit inside your bore or around your guide rod with adequate clearance (typically 0.5–1 mm per side). Check the variant options above to find the combination that matches your design envelope.

Spring rate varies by wire diameter, outer diameter, and number of active coils. Because this listing covers a wide range of sizes, the specific spring rate for each variant is not listed here. If you need an exact spring rate value, please contact us with your selected size and we can provide further technical details or point you to a spring rate calculator.

These springs are made from carbon steel, which offers good mechanical properties but limited inherent corrosion resistance. For outdoor or high-humidity environments, we recommend applying a light coat of machine oil or grease, or selecting a stainless steel spring for your application. Contact us if you need guidance on material alternatives.

Yes — the closed and ground ends provide flat seating surfaces compatible with standard spring plates and guide rods. Ensure the guide rod outer diameter is smaller than the spring inner diameter (outer diameter minus twice the wire diameter) and that the bore or housing inner diameter is larger than the spring outer diameter. Refer to the variant size options to confirm fit before ordering.

Yes. The smaller wire/OD combinations (e.g., 0.3×3 mm through 0.8×10 mm) are well-suited for 3D printer extruder return springs, robotic gripper mechanisms, and light-duty actuator return applications. Larger sizes (1.0–1.6 mm wire) are appropriate for heavier-duty automation fixtures, valve springs, and plunger assemblies. Select the size that matches your required force and travel.

Ordering in packs of 3 or 5 is cost-effective for prototyping (you can test multiple configurations), for production runs where spares are needed, or for symmetric mechanisms that require matched springs on both sides. Multi-piece packs also reduce per-unit cost compared to single-piece orders.

A compression spring is designed to resist compressive (pushing) forces and returns to its free length when the load is removed. An extension spring, by contrast, resists tensile (pulling) forces and has hooked ends. These springs in this listing are compression type — they are used in applications where two surfaces push against the spring, such as button mechanisms, valve returns, and shock absorbers.