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When a project demands consistent return force in a compact form factor, finding a compression spring with the right wire diameter, outer diameter, and free length can be frustrating. Engineers, hobbyists, and repair technicians who work with small-scale mechanisms — from 3D printer extruders and RC vehicles to industrial jigs and consumer electronics — need a spring that holds its rated load cycle after cycle without permanent set. These 2mm wire diameter compression springs in spring steel are engineered to deliver repeatable elastic performance across a wide selection of sizes.
Each spring is wound from spring steel wire with a nominal wire diameter of 2mm (0.079 in). Outer diameters span 10mm to 40mm (0.39–1.57 in), and free lengths range from 60mm to 100mm (2.36–3.94 in). Springs are sold in packs of 5 pieces per order. Finish is a natural bright steel; surface condition is consistent with standard cold-coiled spring steel wire.
Typical use cases include compression return mechanisms in 3D printer Z-axis assemblies, spring-loaded plunger fixtures for PCB testing jigs, and tension-balancing components in lightweight automation equipment. The broad OD and length matrix makes these springs well-suited for prototype development where exact spring rate must be dialed in by swapping sizes.
Consistent 2mm (0.079 in) wire cross-section across all variants for predictable spring rate and load capacity.
OD range 10–40mm and free length 60–100mm gives you 135 size combinations to match your exact application.
Cold-coiled spring steel wire provides strong elastic memory and resistance to fatigue under repeated compression cycles.
Each order ships as a pack of 5 identical springs — useful for prototyping, replacement stock, or symmetric multi-spring layouts.
Closed ends ensure flat seating on spring pockets and parallel load transfer across all size variants.
Suitable for 3D printer assemblies, RC mechanisms, test fixtures, automation equipment, and general mechanical prototyping.
| Wire Diameter | 2mm (0.079 in) |
|---|---|
| Outer Diameter (OD) | See variant options (10–40mm / 0.39–1.57 in) |
| Free Length | See variant options (60–100mm / 2.36–3.94 in) |
| Spring Material | Spring Steel |
| End Type | Closed ends (typical) |
| Coil Direction | Right-hand (standard) |
| Surface Finish | Bright / natural steel |
| Spring Rate | See variant options |
| Pack Quantity | 5 Pcs per order |
| Application Type | Compression / Pressure Spring |
Measure the bore or spring pocket inner diameter — your spring OD should be 0.5–1.5mm smaller than the bore for clearance fit. For guide rod installations, the spring ID (OD minus 2× wire diameter) should be at least 0.5mm larger than the rod. Free length should exceed your required working length by enough to maintain a minimum load at full extension. Select from the variant dropdown above to match your dimensional requirements.
Load capacity depends on OD, free length, and number of active coils — all of which vary by size variant. As a conservative reference, 2mm wire spring steel compression springs in this OD range typically handle working loads from approximately 5N to 50N depending on the specific geometry. For precise spring rate and load data for your selected size, contact us to confirm.
Spring steel in its natural bright finish offers moderate corrosion resistance suitable for indoor, dry environments. For applications exposed to moisture, chemicals, or outdoor conditions, consider adding a protective coating (e.g., zinc plating, oil film) or contact us about alternative material options such as stainless steel springs.
Yes. The 2mm wire diameter and OD range of 10–40mm make these springs well-matched to 3D printer Z-axis bed leveling assemblies, extruder mechanisms, and RC suspension or steering return systems. Select the OD and length that fits your specific model's spring pocket dimensions.
Each OD variant (10mm through 40mm) has a different inner diameter and spring rate. A larger OD with the same wire diameter and length will generally have a lower spring rate (softer feel), while a smaller OD will be stiffer. Choose based on your required load and the physical space available in your assembly.
All variants in this listing are sold in packs of 5 pieces. This is reflected in the "Amount: 5 Pcs" option shown in the variant selector. For bulk quantities beyond 5 pieces, please contact us for wholesale pricing.
We recommend ordering a single 5-piece pack of your target size first to verify fit, load feel, and cycle performance in your application before placing a larger order. If you need a specific spring rate or load specification confirmed in advance, reach out via our contact page with your application details.
