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When your project demands consistent spring force in a compact form factor, finding the right compression spring can be frustrating — wrong wire diameter, wrong outer diameter, or springs that lose tension after a few cycles. These compression springs are designed for makers, engineers, and DIY builders who need precise, repeatable performance across a wide range of sizes.
Each spring is manufactured from stainless steel wire with diameters ranging from 0.6 mm to 1 mm (0.024"–0.039"), outer diameters from 4 mm to 12 mm (0.16"–0.47"), and a free length of 18 mm (0.71"). The helical coil geometry provides linear load characteristics suitable for light-to-medium duty applications.
These compression springs are well-suited for use in 3D printer bed leveling mechanisms, small robotics actuators and gripper assemblies, electronic enclosure latches and push-button return mechanisms, and precision jig and fixture clamping setups requiring consistent preload.
Available in outer diameters from 4 mm to 12 mm and wire diameters from 0.6 mm to 1 mm — one listing covers the full spectrum of small compression spring needs.
Made from stainless steel wire, offering solid corrosion resistance for indoor mechanical assemblies, humid environments, and applications where carbon steel would oxidize.
All variants share an 18 mm (0.71") free length, making it straightforward to swap diameters without redesigning your spring pocket depth.
The open-coil helical geometry delivers linear compression force, predictable deflection behavior, and reliable return stroke — essential for repeatable mechanical actuation.
Each order includes 10 pieces of your selected size, giving you spares for prototyping, testing, and replacement without needing to reorder frequently.
Choose from 0.6 mm, 0.7 mm, 0.8 mm, 0.9 mm, or 1 mm wire diameter to match the spring rate and load capacity your application requires.
| Spring Type | Compression (helical coil) |
|---|---|
| Material | Stainless Steel |
| Free Length | 18 mm (0.71") |
| Outer Diameter Range | 4 mm – 12 mm (0.16" – 0.47") |
| Wire Diameter Range | 0.6 mm – 1 mm (0.024" – 0.039") |
| Coil Direction | See variant options |
| End Type | See variant options |
| Spring Rate | See variant options |
| Quantity per Pack | 10 pcs |
| Finish | Natural stainless |
Measure the bore or spring pocket in your assembly. The spring's outer diameter should be slightly smaller than the bore to allow free movement without binding. For a shaft-guided spring, the inner diameter (outer diameter minus twice the wire diameter) should be slightly larger than the shaft. Select your outer diameter variant accordingly from the options above.
Wire diameter directly affects spring rate and load capacity. A thicker wire (e.g., 1 mm) produces a stiffer spring that requires more force to compress, while a thinner wire (e.g., 0.6 mm) yields a softer spring with lower load capacity. Choose a thicker wire when you need higher resistance or preload, and a thinner wire for lighter-duty return or cushioning applications.
These springs are made from stainless steel, which provides good resistance to rust and oxidation in typical indoor and moderately humid conditions. For prolonged outdoor exposure or contact with harsh chemicals or saltwater, additional protective measures or a higher-grade stainless alloy may be advisable. Contact us to confirm suitability for your specific environment.
Yes. These compression springs are commonly used in 3D printer bed leveling assemblies, CNC router dust shoe returns, and similar precision motion applications. The consistent 18 mm free length and range of outer diameters make them compatible with many standard spring pockets found in maker hardware. Verify the outer diameter and wire diameter match your specific printer or machine's spring specification before ordering.
Each order includes 10 pieces of your selected size combination (length, wire diameter, outer diameter, and material). This gives you extras for prototyping, testing, or future replacements without needing to place a separate order.
Before ordering, confirm three key dimensions against your design: (1) outer diameter — must fit freely inside the bore or housing; (2) wire diameter — determines spring rate and load; (3) free length — all variants are 18 mm, so verify your assembly has sufficient travel and pocket depth. If you are unsure, contact us with your application details and we can help you select the right variant.
Yes. The smaller diameter variants (4 mm–6 mm outer diameter, 0.6 mm–0.7 mm wire) are well-suited for push-button return springs, battery contact springs, and latch mechanisms in electronic enclosures. The stainless steel material also avoids the conductivity concerns associated with some coated carbon steel springs in sensitive electronic environments.
