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When a mechanism fails because a spring loses tension or snaps under load, the entire project stalls. Engineers, hobbyists, and repair technicians who need a dependable, dimensionally consistent compression spring in a compact form factor will find this range an essential stock item.
These compression springs are wound from carbon steel wire with a diameter of 1.2 mm (approximately 0.047 in). Outer diameters span 8 mm to 22 mm (approx. 0.31 in to 0.87 in), and free lengths range from 10 mm to 100 mm (approx. 0.39 in to 3.94 in). Each spring features closed and ground ends for stable seating and consistent load distribution.
Typical use cases include small pressure spring replacement in mechanical assemblies, coil spring inserts for jigs and fixtures, return springs in DIY automation projects, and compression spring components in hobby robotics or 3D-printer mechanisms.
Consistent wire gauge across all variants ensures predictable spring rate and load capacity for small-to-medium force applications.
Outer diameters from 8 mm to 22 mm and free lengths from 10 mm to 100 mm let you match the exact geometry your project requires.
Wound from carbon steel wire offering a balance of tensile strength and elasticity suited to repetitive compression cycles in mechanical assemblies.
Ground end coils provide a flat, stable seating surface that reduces lateral deflection and improves load alignment in confined spaces.
Available in packs of 5 or 10 pieces depending on the selected length, giving you spares on hand for prototyping or batch repairs.
Suited for DIY mechanisms, hobby robotics, 3D-printer components, jig fixtures, and general small-pressure spring replacement tasks.
| Wire Diameter | 1.2 mm (approx. 0.047 in) |
|---|---|
| Outer Diameter | 8 mm – 22 mm (approx. 0.31 in – 0.87 in); see variant options |
| Free Length | 10 mm – 100 mm (approx. 0.39 in – 3.94 in); see variant options |
| End Type | Closed and ground |
| Material | Carbon steel |
| Finish / Coating | See variant options |
| Spring Rate | See variant options |
| Pack Quantity | 5 pcs (lengths 60 mm+) / 10 pcs (lengths up to 50 mm) |
| Application | General mechanical, DIY, hobby, light industrial |
Measure the bore or housing that will guide the spring. The outer diameter of the spring should be slightly smaller than the bore diameter — typically 0.5 mm to 1 mm of clearance — to allow free compression without binding. If the spring sits over a rod, the inner diameter (outer diameter minus twice the wire diameter) must exceed the rod diameter.
Load capacity depends on the outer diameter, free length, and number of active coils. Smaller outer diameters and shorter free lengths generally produce stiffer springs with higher spring rates. For precise load calculations, use the spring rate formula or contact us with your deflection and load requirements.
These springs are made from carbon steel, which offers good mechanical properties but limited corrosion resistance in wet or humid environments. For outdoor or moisture-exposed applications, consider applying a light coat of oil or grease, or select a stainless steel alternative if long-term corrosion resistance is critical.
Free length is the overall length of the spring when no load is applied — this is the dimension listed in the variant options. Compressed length (solid height) is the length when all coils are fully closed. Always ensure your assembly has enough travel space between the free length and the solid height to achieve the desired deflection without bottoming out the spring.
Yes. The compact size range (8–22 mm OD, 10–100 mm length) makes these springs well-suited for extruder tensioners, bed leveling mechanisms, servo return springs, and similar light-duty automation components. Select the variant whose outer diameter and free length match your design's spring pocket dimensions.
Springs with free lengths of 60 mm and above are larger and heavier per piece. Pack quantities are adjusted to keep each listing at a practical and cost-effective unit count. If you need larger quantities, multiple packs can be ordered, or contact us to discuss bulk pricing.
Measure three dimensions on the original spring: (1) wire diameter using calipers, (2) outer diameter across the widest point of the coil, and (3) free length when the spring is unloaded. Match these measurements to the variant options. If the original spring is already compressed or deformed, measure the housing bore and depth instead and select accordingly.
