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When a spring fails mid-project — snapping under load, corroding in a damp environment, or simply arriving in the wrong size — the whole build stalls. Whether you are a hobbyist assembling a custom mechanism, a maker prototyping a robot joint, or a technician repairing precision equipment, having the right compression spring on hand is non-negotiable. This pack of 10 stainless steel compression springs is designed for engineers, makers, and DIY enthusiasts who need consistent elastic performance across a wide range of applications.
Each pack contains 10 identical compression springs manufactured from stainless steel wire. Wire diameter options span 0.8 mm and 1 mm (approximately 0.031 in and 0.039 in). Outer diameter ranges from 6 mm to 16 mm (approximately 0.24 in to 0.63 in) depending on the selected variant. Free lengths range from 10 mm to 305 mm (approximately 0.39 in to 12.0 in), giving you precise control over spring travel and load characteristics.
These springs suit a broad range of use cases: replacing worn return springs in mechanical assemblies, adding preload tension in 3D-printer extruder mechanisms, providing cushioning in custom jigs and fixtures, and acting as reset elements in electronic switch housings. Long-tail applications include small compression spring for robotics, stainless steel coil spring for DIY projects, and miniature compression spring replacement pack.
| Material | Stainless Steel |
|---|---|
| Wire Diameter | 0.8 mm or 1 mm (see variant options) |
| Outer Diameter | 6 mm – 16 mm (see variant options) |
| Free Length | 10 mm – 305 mm (see variant options) |
| Quantity per Pack | 10 pcs |
| Spring Type | Compression |
| End Type | See variant options |
| Spring Rate | See variant options |
| Surface Finish | Natural stainless (uncoated) |
| Corrosion Resistance | Suitable for general indoor and mildly humid environments |
Select the wire diameter (0.8 mm or 1 mm) based on the load you need the spring to handle — thicker wire generally means a stiffer spring. The outer diameter must fit inside your housing or guide rod; the inner diameter (outer diameter minus twice the wire diameter) must clear the guide rod. Use the variant selector to match both dimensions to your design drawings.
The free length is the uncompressed length of the spring. Choose a free length longer than your required working length so the spring has room to compress under load. As a rule of thumb, the working deflection should not exceed 80% of the free length to avoid coil bind and permanent set.
Spring strength depends on wire diameter, outer diameter, free length, and number of active coils. Thicker wire and smaller outer diameter produce a stiffer spring. For light-duty applications such as 3D printer extruder preload, switch return, or model engineering, the 0.8 mm and 1 mm wire options are well-suited. For heavy industrial loads, consult the spring rate data or contact us to confirm suitability.
These springs are made from stainless steel, which provides good resistance to oxidation and mild corrosion in typical indoor and lightly humid environments. They are not rated for continuous immersion in saltwater or aggressive chemical environments. For such conditions, consider a higher-grade stainless alloy or a coated spring.
Yes. The small wire diameters (0.8 mm and 1 mm) and compact outer diameters (from 6 mm) make these springs a popular choice for 3D printer extruder preload assemblies, filament runout sensor mechanisms, and lightweight robotic joints. Check the outer diameter and free length against your specific printer or robot frame dimensions before ordering.
Yes, provided you match the wire diameter, outer diameter, and free length of the original spring. Measure the original spring carefully (or refer to the equipment service manual) and select the matching variant. The pack of 10 gives you spares for future replacements without a separate reorder.
The 1 mm wire diameter springs are stiffer and can handle higher loads for the same outer diameter and length compared to the 0.8 mm versions. If your application requires a softer, more compliant spring with lower preload force, choose 0.8 mm. If you need more resistance and a firmer return force, choose 1 mm.
