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When a worn-out or incorrectly sized spring causes equipment failure, finding an exact replacement quickly matters. Engineers, maintenance technicians, and DIY enthusiasts who need reliable compression springs across a wide dimensional range will find this listing covers the most commonly required specifications in a single place.
Each compression spring is formed from round steel wire with diameters ranging from 1.2mm to 1.8mm (approximately 0.047–0.071 in), wound to outer diameters of 6–40mm (approximately 0.24–1.57 in), and cut to a uniform free length of 300mm (approximately 11.81 in). The wire is wound in a closed-end coil configuration typical of standard compression springs, with a surface finish consistent with cold-wound spring steel wire.
Typical use cases include replacement compression springs for small machinery and jigs, return springs in DIY tool builds and fixtures, and load-bearing springs in custom mechanical assemblies requiring a specific wire-diameter-to-OD ratio for precise spring rate control.
| Spring Type | Compression Spring |
|---|---|
| Wire Diameter Range | 1.2mm – 1.8mm (0.047 – 0.071 in) |
| Outer Diameter Range | 6mm – 40mm (0.24 – 1.57 in) |
| Free Length | 300mm (11.81 in) |
| Coil End Type | Closed ends |
| Winding Direction | See variant options |
| Material | Spring steel wire (cold-wound) |
| Surface Finish | See variant options |
| Spring Rate | See variant options |
| Number of Active Coils | See variant options |
| Available Quantities | 1 Pcs / 10 Pcs |
Start by measuring the guide rod or bore your spring will seat in. The inner diameter of the spring (outer diameter minus twice the wire diameter) must clear the guide rod with a small gap — typically 0.5–1mm. The outer diameter must fit inside any housing bore. Once you have those constraints, select the wire diameter based on the load you need: thicker wire (e.g., 1.8mm) produces a stiffer spring for the same OD and length, while thinner wire (e.g., 1.2mm) gives a softer rate.
Load capacity depends on the specific wire diameter, outer diameter, number of active coils, and deflection distance — all of which vary by variant. As a general guide, springs with 1.8mm wire and smaller ODs (e.g., 10–15mm) will carry more load per unit deflection than 1.2mm wire springs with larger ODs. If you need a calculated spring rate for your variant, contact us with your selected Wire Diameter × OD combination.
These springs are made from cold-wound spring steel wire. Standard spring steel has moderate corrosion resistance suitable for indoor and dry environments. For applications exposed to moisture, chemicals, or outdoor conditions, consider applying a protective coating after installation (e.g., light oil, zinc spray) or contact us to confirm whether a coated variant is available for your size.
Yes. The 300mm free length is intentionally generous so you can cut the spring to your required working length. Use a rotary cutting tool or spring cutter for a clean cut. After cutting, the end coil may need to be ground flat if a stable bearing surface is required. Note that cutting changes the number of active coils and therefore the spring rate — plan your cut length accordingly.
Both options supply the identical spring in your chosen Wire Diameter × OD combination. The 1 Pcs option is suited for single replacements or prototyping. The 10 Pcs option provides a cost-effective quantity for batch builds, maintenance kits, or keeping workshop stock on hand. Pricing per piece is lower in the 10 Pcs pack.
Measure three dimensions on your existing spring or housing: (1) the outer diameter of the spring seat or bore — your spring OD should be 0.5–1mm smaller; (2) the guide rod diameter — your spring inner diameter (OD minus 2× wire dia) should be 0.5–1mm larger than the rod; (3) the available cavity depth — your compressed length must not exceed this. If you are replacing a worn spring, measure the original wire diameter and OD directly with calipers before selecting a variant.
These are standard cold-wound compression springs appropriate for general mechanical use. For high-cycle fatigue applications (millions of cycles under dynamic load), shot-peened or pre-set springs are typically specified. If your application involves continuous dynamic cycling, contact us to confirm suitability or discuss alternative specifications.
