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When a worn-out or undersized spring causes equipment to fail mid-task, finding the right replacement fast matters. Whether you are a DIY enthusiast repairing household appliances, a technician servicing industrial machinery, or a maker prototyping a mechanical assembly, these compression springs give you the precise resistance and dimensional accuracy you need without guesswork.
Each spring is wound from round steel wire in diameters ranging from 0.3 mm to 4.5 mm (approx. 0.012–0.177 in), with outer diameters spanning 2 mm to 42 mm (approx. 0.08–1.65 in) and a uniform free length of 300 mm (approx. 11.8 in). The open-coil helical design delivers consistent linear compression force across the full stroke.
Typical use cases include compression spring replacement for automotive suspension components, spring-loaded latches and door mechanisms, custom jigs and fixtures in workshop settings, and prototype spring assemblies for robotics or electronics enclosures.
Outer diameters from 2 mm to 42 mm and wire diameters from 0.3 mm to 4.5 mm cover the majority of standard replacement and custom-build needs in a single listing.
All variants share a uniform 300 mm (11.8 in) free length, making it straightforward to cut to length or use as-is for longer-stroke applications.
The open-coil geometry provides smooth, linear compression force with predictable spring rate, reducing the risk of buckling under axial load.
Springs are finished to resist surface oxidation in typical indoor and light-outdoor environments, extending service life in workshop and appliance applications.
Each size combination is engineered to maintain structural integrity under rated load — the wire diameter is matched to the outer diameter to prevent coil clash at maximum compression.
From automotive and appliance repair to robotics prototyping and custom mechanical assemblies, these springs adapt to a broad range of compression spring replacement scenarios.
| Spring Type | Open-Coil Helical Compression Spring |
|---|---|
| Wire Diameter Range | 0.3 mm – 4.5 mm (0.012 – 0.177 in) |
| Outer Diameter Range | 2 mm – 42 mm (0.08 – 1.65 in) |
| Free Length | 300 mm (11.8 in) |
| Material | See variant options |
| Surface Finish | See variant options |
| Spring Rate | See variant options |
| End Type | See variant options |
| Coil Direction | Right-hand (standard) |
| Operating Temperature | Contact us to confirm |
| Load Capacity | See variant options |
| Quantity per Order | 1 piece |
Start with the housing bore or guide rod diameter of your assembly. The outer diameter of the spring should be slightly smaller than the bore (typically 0.5–1 mm clearance) or slightly larger than the guide rod. Then select a wire diameter that provides the spring rate and load capacity your application requires — thicker wire means a stiffer spring. If you are unsure, contact us with your load and deflection requirements.
Yes. The 300 mm free length is intentionally long to give you flexibility. You can cut the spring to your required length using a rotary tool or spring cutter. After cutting, lightly grind the end coil flat to ensure even seating. Note that cutting changes the spring rate and load capacity proportionally.
These springs are finished to resist light surface oxidation in typical indoor and sheltered outdoor conditions. For prolonged exposure to moisture, salt spray, or chemicals, we recommend applying a corrosion-inhibiting coating or selecting a stainless steel variant. Contact us to confirm material options for your specific environment.
Spring rate (measured in N/mm or lb/in) describes how much force is required to compress the spring by one unit of length. A higher wire-to-outer-diameter ratio generally produces a higher spring rate. Because spring rate varies by size combination, please contact us with your required load and deflection values so we can confirm the best variant for your use case.
Yes, the outer diameters listed (2–42 mm) align with common metric guide rod and housing bore sizes used in machinery, automotive, and DIY applications. Always verify the bore clearance and guide rod diameter against the selected outer diameter before ordering. A clearance of 0.5–1 mm on each side is typical for smooth operation.
Smaller wire diameters (0.3–0.8 mm) are suited for light-load applications such as electronics, small appliances, and precision instruments where low force and compact size are priorities. Larger wire diameters (1.5–4.5 mm) are designed for heavier loads in automotive, industrial, or structural assemblies. Match the wire diameter to your required load — if in doubt, share your load and travel specifications and we will recommend the right size.
Standard carbon steel springs are rated for typical ambient temperatures. For applications involving elevated heat (above approximately 120°C / 250°F), material performance may degrade. Contact us to confirm the operating temperature range for your selected variant before use in high-temperature environments.
