Compression Spring Steel 2.5 mm Wire Dia Pressure Springs-Coil Spring

Measure the bore or housing that the spring will sit inside, then select an OD that is 0.5–1 mm smaller than the bore for a free-sliding fit, or match the OD to the spring seat diameter if the spring sits on a post. This product offers OD options from 14 mm to 40 mm to cover most standard seat sizes.

The free length should be longer than your required compressed length plus the desired preload travel. Measure the available cavity depth in your assembly and choose the free length that gives you the correct working deflection range. Options here run from 20 mm to 50 mm.

Load capacity depends on the specific OD, wire diameter, free length, and number of active coils. With a 2.5 mm wire diameter, these springs are suited to light-to-medium duty applications such as return mechanisms, jig clamping, and cushioning in small automation. For exact spring rate and load data, contact us to confirm for your selected variant.

These springs are made from carbon steel, which offers good mechanical strength but limited inherent corrosion resistance. For outdoor or humid environments, consider applying a light coat of machine oil or grease after installation. If corrosion resistance is a primary requirement, contact us to ask about stainless steel alternatives.

Yes. Compression springs in the 14–20 mm OD range and 20–40 mm free length are commonly used for 3D printer bed leveling and CNC return mechanisms. Select the OD and length that match your printer's spring seat dimensions. The 2.5 mm wire diameter provides firm, consistent preload suitable for these applications.

Many mechanical assemblies use springs in pairs — for example, bilateral suspension points, dual-axis leveling systems, or matched compression on both sides of a clamping fixture. Selling in 2-piece packs ensures you always have a matched spare and reduces the risk of mismatched spring rates in symmetrical setups.

Check three dimensions on your existing spring or housing: wire diameter (should be 2.5 mm), outer diameter (select the matching OD variant), and free length (select the matching length variant). If you are replacing a worn spring, measure the original at rest — not under compression. If unsure, contact us with your measurements and we will help you select the correct variant.