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When a loose fit, inconsistent rebound, or undersized spring causes your mechanism to fail mid-cycle, the entire assembly pays the price. Engineers, makers, and repair technicians working on compact actuators, jigs, fixtures, and electronic enclosures need springs that deliver repeatable force in tight spaces — every single time.
These compression springs are made from stainless steel wire with diameters ranging from 0.6 mm to 1 mm (0.024"–0.039"), wound to a free length of 12 mm (0.47"). Outer diameters span 4 mm to 10 mm (0.16"–0.39"), giving you a broad selection matrix to match your bore or housing. Each pack contains 10 pieces of a single size combination.
Typical use cases include spring-loaded plunger assemblies in CNC tooling, button-return mechanisms in electronic enclosures, tension-balancing in small robotic joints, and compression buffers in 3D printer extruder carriages — all applications where a compact compression spring with consistent spring rate is critical to performance.
Wound from corrosion-resistant stainless steel wire, these springs maintain structural integrity in humid, mildly corrosive, or outdoor-adjacent environments without surface treatment.
Outer diameters from 4 mm to 10 mm paired with wire diameters from 0.6 mm to 1 mm give you precise control over spring rate and load capacity for your specific application.
All variants share a uniform 12 mm (0.47") free length, simplifying design when you need to swap wire gauge or OD without changing your housing depth.
Close-wound coil geometry ensures uniform load distribution across the spring body, reducing set and fatigue in repetitive compression-release cycles.
Each order ships as a 10-piece set of a single size combination — ideal for prototyping, repair stock, or small-batch production runs where you need spares on hand.
Sized for light-to-medium load applications including spring-loaded plungers, button returns, latch mechanisms, extruder carriages, and sensor mounts across CNC, robotics, and electronics builds.
| Free Length | 12 mm (0.47 in) |
|---|---|
| Outer Diameter | 4 mm / 5 mm / 6 mm / 7 mm / 8 mm / 9 mm / 10 mm |
| Wire Diameter | 0.6 mm / 0.7 mm / 0.8 mm / 0.9 mm / 1.0 mm |
| Material | Stainless Steel |
| Spring Type | Compression |
| End Type | See variant options |
| Spring Rate | See variant options |
| Quantity per Pack | 10 pcs |
| Surface Finish | Natural (uncoated stainless) |
Measure the inner diameter of your spring pocket or bore, then select an OD that is 0.2–0.5 mm smaller to allow free movement without binding. For example, a 10 mm bore typically pairs well with a 9 mm OD spring. Use the variant selector above to choose your OD.
Wire diameter directly affects spring rate and load capacity. A thicker wire (1 mm) produces a stiffer spring with higher load capacity, while a thinner wire (0.6 mm) yields a softer spring suited for lighter return forces. Choose based on the force your mechanism requires at the compressed length.
Yes. These springs are made from stainless steel, which provides good resistance to rust and mild corrosion in humid or outdoor-adjacent environments. They are not rated for immersion in strong acids or chlorinated solutions — for those environments, contact us to confirm suitability.
Yes. The 12 mm free length and 4–10 mm OD range make these springs well-suited for 3D printer bed leveling, extruder carriage returns, and CNC tooling plungers. Select the OD and wire diameter that match your existing spring pocket dimensions.
Load capacity varies by wire diameter and OD combination. Thicker wire and smaller OD generally produce higher spring rates. Exact load values depend on the specific variant — if you need precise spring rate data for engineering calculations, contact us to confirm before ordering.
Each order includes 10 pieces of a single size combination (one OD + one wire diameter). If you need multiple sizes, add each size variant to your cart separately.
Solid length depends on the number of coils and wire diameter for each variant. As a conservative estimate, solid length is typically 30–50% of the 12 mm free length for these wire gauges. Contact us to confirm the exact coil count for your selected variant if solid height is a critical design constraint.
