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Engineers, makers, and repair technicians often struggle to find compression springs that match exact dimensional requirements without ordering custom tooling. These 90mm long compression springs are designed for those who need a reliable, off-the-shelf solution with consistent spring force and dimensional accuracy across a wide range of outer diameters and wire gauges.
Each spring measures 90mm (approximately 3.54 inches) in free length, with outer diameters ranging from 3mm to 30mm (roughly 0.12 in to 1.18 in) and wire diameters from 0.5mm to 1.8mm (0.020 in to 0.071 in). Available in spring steel, stainless steel, and zinc-plated (zincification) finishes to suit different load and corrosion requirements.
These 90mm compression springs are well-suited for CNC machine return mechanisms, 3D printer bed leveling assemblies, electronic device button actuation, and light-duty industrial jig fixtures — anywhere a compact coiled spring with consistent elastic return is needed.
Consistent 90mm (3.54 in) free length across all variants for predictable travel and deflection calculations.
Outer diameters from 3mm to 30mm (0.12–1.18 in) cover a broad range of bore and seat sizes in one product line.
Wire diameters from 0.5mm to 1.8mm allow selection of light, medium, or heavier spring rates for your load requirements.
Choose spring steel for economy, stainless steel for corrosion resistance, or zinc-plated for moderate rust protection in humid environments.
Available in 1pc, 2pcs, or 5pcs packs — order exactly what your project needs without excess inventory.
Ends are typically closed and ground for flat, stable seating on spring seats and guide rods, reducing lateral deflection under load.
| Free Length | 90 mm (3.54 in) |
|---|---|
| Outer Diameter | 3 mm – 30 mm (0.12 in – 1.18 in) |
| Wire Diameter | 0.5 mm – 1.8 mm (0.020 in – 0.071 in) |
| Material | Spring Steel / Stainless Steel / Zinc-Plated Steel |
| Spring Type | Compression (coiled) |
| End Type | Closed and ground (typical) |
| Spring Rate | See variant options |
| Load Capacity | See variant options |
| Surface Finish | Natural (spring steel) / Bright (stainless) / Zinc-plated |
| Pack Quantity | 1 pc / 2 pcs / 5 pcs (see variant options) |
Measure the inner diameter of the bore or housing where the spring will sit. The spring's outer diameter should be slightly smaller than the bore to allow free movement without binding. If the spring rides on a guide rod, the inner diameter of the spring (outer diameter minus twice the wire diameter) must clear the rod. Select your outer diameter from the Diameter option above.
Spring steel offers a good balance of elasticity and cost, making it suitable for dry indoor environments. Stainless steel provides significantly better corrosion resistance and is recommended for humid, wet, or mildly corrosive environments. Zinc-plated spring steel sits between the two — it offers moderate rust protection at a lower cost than stainless steel.
Stainless steel variants are the best choice for outdoor or humid environments. Zinc-plated variants offer moderate protection for light outdoor exposure. Plain spring steel variants are best kept in dry, indoor conditions to avoid rust over time.
A larger wire diameter produces a stiffer spring with a higher spring rate, meaning it resists compression more strongly. For heavier loads, select a larger wire diameter (e.g., 1.4mm–1.8mm). For lighter loads or finer actuation, smaller wire diameters (e.g., 0.5mm–0.8mm) are more appropriate. If you need exact spring rate values, contact us to confirm before ordering.
Yes. These 90mm compression springs are commonly used in 3D printer bed leveling systems, CNC axis return mechanisms, and router depth-stop assemblies. Select the outer diameter that fits your spring seat and the wire gauge that matches your required preload force. Stainless steel is recommended for enclosed, potentially humid machine enclosures.
Pack quantity depends on the variant selected under "Material Selection & Qty (pcs)". Options include 1pc, 2pcs, and 5pcs. Choose the quantity that matches your project needs. Larger packs offer better per-unit value for prototyping or batch builds.
Deflection range depends on wire diameter, outer diameter, and material. As a general guideline, these springs can typically be compressed 30–60% of their free length (approximately 27–54mm) before reaching solid height. Exact solid height and maximum safe deflection vary by variant — contact us to confirm for critical applications.
