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When a mechanism fails because a spring loses tension too quickly or collapses under load, the root cause is almost always an undersized wire diameter. Engineers, makers, and repair technicians who need consistent, repeatable spring force turn to 2.0mm wire compression springs — a wire gauge that balances flexibility with load-bearing capacity across a wide range of compact assemblies.
These compression springs are wound from round steel wire with a nominal wire diameter of 2.0mm (approx. 0.079 in). Outer diameters span 12mm to 30mm (approx. 0.47–1.18 in), and free lengths range from 10mm to 305mm (approx. 0.39–12.0 in). Each spring features closed and ground ends for stable seating, and the coil pitch is sized to deliver progressive resistance as the spring compresses.
Typical use cases include CNC machine axis return mechanisms, 3D printer bed leveling assemblies, robotics joint preload, valve return springs in pneumatic systems, and general DIY repair of furniture, appliances, and mechanical toys. The broad size matrix — selectable by outer diameter and free length — makes it straightforward to match the exact spring rate needed for compression spring replacement or new-build projects.
A wire gauge that delivers firm, consistent spring force without excessive stiffness — suited to medium-load compression applications in compact assemblies.
Outer diameters from 12mm to 30mm and free lengths from 10mm to 305mm give you precise control over spring rate and travel without custom fabrication.
Flat, ground end coils seat squarely against spring pockets and guide rods, reducing lateral deflection and extending service life in repetitive-cycle applications.
Surface treatment helps resist oxidation in typical indoor mechanical environments, maintaining spring rate stability over extended use cycles.
Shorter lengths are available in packs of 4 for multi-axis or symmetrical assemblies; longer lengths ship individually so you only pay for what you need.
Standard coil geometry fits common spring seats in CNC routers, 3D printers, pneumatic valves, and general mechanical assemblies without modification.
| Wire Diameter | 2.0mm (0.079 in) |
|---|---|
| Outer Diameter Range | 12mm – 30mm (0.47 – 1.18 in) |
| Free Length Range | 10mm – 305mm (0.39 – 12.0 in) |
| End Type | Closed and ground |
| Material | Steel wire (carbon spring steel) |
| Surface Finish | See variant options |
| Spring Rate | See variant options |
| Coil Direction | Right-hand wound |
| Pack Size | 1 pc or 4 pcs (see variant options) |
| Application | Compression / return spring |
Measure the inner diameter of the spring bore or the outer diameter of the guide rod. For a bore-mounted spring, the spring OD should be 0.5–1.5mm smaller than the bore ID to allow free movement. For a rod-guided spring, the spring ID (OD minus 2× wire diameter, so OD minus 4mm for this 2.0mm wire) should be 0.5–1mm larger than the rod OD. Select the variant whose OD fits within those tolerances.
Load capacity depends on the outer diameter, free length, and number of active coils — all of which vary by variant. As a general guide, 2.0mm wire springs in the 12–20mm OD range typically handle light-to-medium loads (roughly 5–50 N depending on deflection and coil count). For exact spring rate and maximum load data for a specific variant, contact us to confirm before ordering for load-critical applications.
These springs are finished for typical indoor mechanical use. For outdoor, marine, or high-humidity environments, we recommend verifying the surface treatment with us before ordering, or considering stainless steel alternatives. Applying a light machine oil after installation can extend service life in moderately humid conditions.
Yes. These are a common choice for 3D printer bed leveling (typically 12–16mm OD, 20–40mm free length) and CNC router axis return mechanisms. Match the OD to your spring seat pocket and the free length to your required preload travel. The closed and ground ends seat flat against standard spring pockets without shimming.
Shorter free lengths (10mm–50mm) are available in packs of 4, which suits symmetrical assemblies such as 4-corner bed leveling or multi-axis preload setups. Longer free lengths (60mm–305mm) are sold individually because they are typically used one per assembly. The pack size is shown in the "Length & Pack Size" variant selector.
Free length is the overall length of the spring with no load applied. Measure from the flat ground surface of one end coil to the flat ground surface of the other end coil using calipers. Compare this to the available travel in your assembly: the spring should compress to your required working length without reaching solid height (coil bind). If you are unsure, contact us with your working length and required force, and we can help you select the correct variant.
The listed variants cover a broad range of standard sizes. If you need a size or spring rate not shown, contact us to confirm availability. Custom or non-standard specifications may be available depending on quantity and lead time.
