Spring steel compression springs with diameter of 8-60mm and a length of 50mm.

Measure the inner diameter of the housing or bore the spring will sit in, then select an outer diameter (OD) that is 1–2mm smaller than the bore for a sliding fit. If the spring rides on a guide rod, the inner diameter of the spring (OD minus twice the wire diameter) must be larger than the rod diameter by at least 0.5mm to prevent binding during compression.

Spring steel (typically high-carbon steel) offers a higher spring rate per unit weight and is cost-effective for dry or lightly oiled indoor environments. Stainless steel (304 grade) resists rust and mild chemical exposure, making it suitable for outdoor, humid, or food-adjacent applications. Nickel-plated spring steel sits between the two — it adds a decorative finish and light corrosion resistance but is not recommended for prolonged immersion or aggressive chemicals.

Load capacity depends on wire diameter and outer diameter. Thicker wire (e.g., 3–4mm) with a smaller OD produces a stiffer spring with higher load capacity, while thinner wire (1.4–1.6mm) with a larger OD produces a softer spring. Exact spring rates and solid-height loads vary by combination; if you need specific force data, contact us with your selected variant and we can provide further technical detail.

For outdoor or humid environments, select the stainless steel variants. Spring steel variants are not inherently rust-resistant and will corrode if exposed to moisture without protective coating. Nickel-plated variants offer moderate outdoor resistance for light-duty, non-immersion applications. For marine or highly corrosive environments, stainless steel is the recommended choice.

Yes. Compression springs with a 50mm free length and outer diameters in the 8–20mm range are commonly used in 3D printer bed levelling assemblies. Select a wire diameter of 1.4–1.6mm for a softer, more adjustable feel, or 1.8–2mm for firmer bed support. Verify the OD fits your existing spring seat or knob recess before ordering.

For prototyping or single-unit repairs, the 1-piece or 2-piece packs let you test fit and function without committing to bulk stock. For small production runs or workshop stock, the 5-piece or 10-piece packs offer a lower per-unit cost. Select your preferred quantity in the "Material Selection & Qty" option above.

Measure the spring in its free (uncompressed) state: (1) Free length — end to end with calipers; (2) Outer diameter — across the widest point of the coil; (3) Wire diameter — across a single coil wire. Match all three dimensions to the variant you select. If your existing spring is worn or set, measure the housing bore and guide rod instead and calculate the required OD and ID from those dimensions.

End type varies by wire diameter and diameter combination. Closed ends (coils touching at each end) are typical for this spring class and provide a flat seating surface. Ground ends (ends machined flat) further improve perpendicularity and load distribution. For confirmation of the end type on a specific variant, contact us before ordering if this is critical to your design.