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When a project demands consistent return force — whether you're repairing a mechanism, building a custom jig, or assembling a precision device — finding the right compression spring in the right size is often the bottleneck. Engineers, makers, and hands-on builders who work across a wide range of diameters need a dependable source that covers the full spectrum without ordering from multiple suppliers.
These compression springs are wound from either stainless steel (304 grade, corrosion-resistant) or spring steel (carbon steel, higher elasticity), with an outer diameter range of 8–60 mm (approx. 0.31–2.36 in) and a fixed free length of 25 mm (approx. 0.98 in). Wire diameters span 1.5 mm to 4 mm depending on the variant selected. Each listing is sold in packs of 1, 2, 5, or 10 pieces as indicated by the variant option.
Typical use cases include compression spring replacement for mechanical assemblies, spring-loaded fixture design for CNC workholding, robotics actuator return mechanisms, and small appliance or tool repair where a specific outer diameter and free length must be matched precisely.
Outer diameters from 8 mm to 60 mm (0.31–2.36 in) in a single product family, covering the majority of standard compression spring applications without sourcing from multiple vendors.
Choose stainless steel (304) for corrosion resistance in humid or outdoor environments, or spring steel for higher elastic energy storage and cost efficiency in dry, indoor applications.
All variants share a 25 mm (0.98 in) free length, making it straightforward to compare and substitute springs across different diameters within the same assembly depth.
Wire diameters from 1.5 mm to 4 mm allow selection of appropriate spring rate and load capacity — thicker wire yields stiffer springs for heavier-duty applications.
Available in packs of 1, 2, 5, or 10 pieces depending on the variant, so you can order exactly what a repair or prototype requires without excess stock.
Suited for mechanical repair, DIY fabrication, CNC fixtures, robotics return mechanisms, and small appliance servicing where a specific OD and free length must be matched to an existing seat.
| Spring Type | Helical Compression Spring |
|---|---|
| Free Length | 25 mm (approx. 0.98 in) |
| Outer Diameter Range | 8–60 mm (0.31–2.36 in) — See variant options |
| Wire Diameter Range | 1.5–4 mm — See variant options |
| Material | Stainless Steel (304) or Spring Steel (Carbon) — See variant options |
| End Type | Closed ends (typical for this size range) |
| Surface Finish | Natural / uncoated |
| Pack Quantity | 1 / 2 / 5 / 10 pcs — See variant options |
| Spring Rate | See variant options |
| Load Capacity | See variant options |
Measure the bore or housing inner diameter where the spring will seat. 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 of the spring must be larger than the shaft diameter. Use the variant selector to match the outer diameter to your measured bore clearance.
Stainless steel (304) offers good corrosion resistance, making it suitable for humid, wet, or outdoor environments where rust is a concern. Spring steel (carbon steel) typically provides a higher elastic modulus and can store more energy per unit weight, making it preferred for dry indoor applications where maximum spring performance is the priority. Spring steel variants are generally more cost-effective.
The stainless steel (304) variants offer meaningful corrosion resistance for most outdoor and humid environments. Spring steel variants are not inherently corrosion-resistant and may develop surface rust if exposed to moisture over time. For consistently wet or chemically aggressive environments, select the stainless steel option and consider additional protective measures if needed.
Yes — these are standard helical compression springs with closed ends, compatible with conventional spring seats, bores, and shaft guides sized to the selected outer diameter. Always verify the seat recess depth (should be ≥ free length when compressed) and bore diameter against the variant's outer diameter before ordering to ensure a proper fit.
Wire diameter determines spring stiffness (spring rate): a thicker wire (e.g., 3–4 mm) produces a stiffer spring that resists compression more strongly, while a thinner wire (e.g., 1.5–1.6 mm) yields a softer spring. For prototyping or single repairs, choose a 1- or 2-piece pack. For production runs or batch repairs, 5- or 10-piece packs offer better value. Select the combination that matches your load requirement and quantity need.
Yes. These compression springs are commonly used in CNC workholding fixtures (as return springs for clamps and stops), robotic actuator return mechanisms, and motion-control assemblies. Select the outer diameter and wire diameter that match your required spring rate and travel distance. For precision applications, verify the spring rate against your design load before finalizing the variant.
The free length is 25 mm (0.98 in) — this is the uncompressed length of the spring. Your housing or assembly must accommodate this length when the spring is at rest, and must compress it to the required working length under load. Ensure your assembly depth is sufficient to house the spring at free length, and that the compressed length does not exceed the solid height of the spring to avoid coil bind.
