Compression Spring 1.2mm Wire Dia 14mm - 20mm OD Small Pressure Springs

Start with the bore or housing diameter your spring must fit inside — select an OD that is 1–2mm smaller than the bore for clearance. Then determine the required free length based on your travel distance plus compressed height. Finally, match the wire diameter (1.2mm here) to your load requirements: thicker wire = higher spring rate. If unsure, order a small quantity (1 or 3 pcs) to test fit before committing to a larger pack.

Spring rate varies by OD and free length combination. Shorter springs with smaller OD tend to have higher spring rates; longer springs with larger OD are softer. Exact spring rate data is not listed per variant — if your application requires a specific rate (N/mm or lbf/in), please contact us to confirm before ordering.

These springs are suited for indoor mechanical environments and typical workshop conditions. They are not rated for continuous outdoor exposure, high-humidity, or submersion. For outdoor or wet environments, consider stainless steel springs. Contact us if you need material confirmation for your specific application.

Available outer diameters are 14mm, 15mm, 16mm, 17mm, 18mm, and 20mm. To match to your application: measure the inner diameter of the housing or bore, then select an OD approximately 1–2mm smaller for a guided fit, or match closely if the spring seats on a post (inner diameter of spring should be slightly larger than the post diameter). The inner diameter is approximately OD minus 2× wire diameter, so roughly 11.6mm to 17.6mm across the range.

Yes. These small compression springs are commonly used in 3D printer bed leveling assemblies, extruder arm return mechanisms, and CNC tooling fixtures. Select the OD and free length that matches your printer's spring pocket dimensions. The 14–16mm OD range with 10–30mm free lengths is most commonly used in desktop FDM printer applications.

Order 1 piece if you are testing fit or replacing a single failed spring. Order 3 or 5 pieces for small repair jobs or prototyping where you want spares. Order 15 pieces for small production runs, classroom projects, or stocking a workshop parts bin. Pricing per piece decreases with larger pack sizes, so bulk packs offer better value for recurring needs.

Both use the same 1.2mm wire diameter, but the 20mm OD spring has a larger coil diameter, which generally results in a lower spring rate (softer feel) for the same free length compared to the 14mm OD. The 20mm OD also requires a wider bore or housing. Choose based on your housing dimensions and the load/deflection behavior your application requires.