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When your project demands a spring that nests flat under load, resists lateral buckling, and fits into tight radial spaces, standard cylindrical springs fall short. Engineers, makers, and repair technicians working on CNC fixtures, robotics actuators, valve assemblies, and precision DIY mechanisms need a cone compression spring that delivers consistent force without wobble or coil clash. These 304 stainless steel cone compression springs are designed for exactly those demanding scenarios.
Each spring is wound from 304-grade stainless steel wire with a diameter ranging from 1 mm to 2 mm (approx. 0.039–0.079 in). The tapered coil geometry transitions from a smaller inner diameter to a larger outer diameter, with overall free lengths spanning 12 mm to 76 mm (approx. 0.47–2.99 in). Number of active turns varies by variant (5 to 19 turns), allowing you to select the spring rate that matches your load requirements.
Typical use cases include: conical spring seats in pneumatic valves and check valves; anti-rattle and preload springs in CNC spindle assemblies; return springs in 3D-printer extruder mechanisms; and compact suspension elements in small robotics joints. The tapered profile also makes these springs ideal as cone compression springs for electronics enclosures where a flat-wound stack height is critical.
| Material | 304 Stainless Steel |
|---|---|
| Wire Diameter Range | 1 mm – 2 mm (0.039 – 0.079 in) |
| Small Diameter Range | See variant options |
| Large Diameter Range | See variant options |
| Free Length Range | 12 mm – 76 mm (0.47 – 2.99 in) |
| Number of Active Turns | See variant options (5 – 19 turns) |
| Spring Type | Cone (Tapered) Compression |
| Wind Direction | See variant options |
| Surface Finish | Natural (uncoated stainless) |
| Pack Quantity | See variant options (1 / 3 / 5 / 10 / 20 / 50 / 100 pcs) |
Start with your available bore or seat diameter — the large OD of the spring must fit inside the bore with clearance, and the small OD must clear the mandrel or guide pin. Then select a wire diameter that gives you the spring rate you need: thicker wire (e.g., 2 mm) produces a stiffer spring, while thinner wire (e.g., 1 mm) gives a softer rate. Cross-reference the free length and number of turns with your required travel and load using standard spring-rate formulas (G·d⁴ / 8·D³·n).
A cone compression spring can telescope into itself under full compression, allowing a solid height close to a single wire diameter. This is ideal when axial space is very limited. The tapered geometry also reduces lateral buckling tendency and provides a naturally progressive spring rate — the rate increases as the larger coils bottom out first, which can be useful for vibration isolation and anti-rattle applications.
304 stainless steel offers solid corrosion resistance against moisture, humidity, and mild chemical exposure, making it suitable for most outdoor DIY, marine-adjacent, and light industrial environments. For highly aggressive environments (salt spray, strong acids, or chlorinated water), consider 316 stainless steel instead. For typical workshop, robotics, or indoor automation use, 304 SS performs reliably over extended service life.
Fewer active turns result in a stiffer spring (higher spring rate), while more turns produce a softer spring. For a cone spring, the effective rate also changes progressively as coils bottom out. If you need a specific rate, calculate using the mean coil diameter and your wire diameter, then select the turn count variant closest to your target. Ordering a small sample pack (1 or 3 pcs) first is recommended for prototyping before committing to larger quantities.
Yes. These cone compression springs are well-suited for CNC fixture preload, 3D-printer bed leveling or extruder return mechanisms, and robotic joint return springs. The stainless steel construction handles repeated cycling without significant fatigue in typical motion-control load ranges. Select the wire diameter and free length that match your travel and force requirements, and verify the small/large OD fits your guide geometry.
For initial prototyping or testing a single assembly, the 1-piece or 3-piece pack lets you validate fit and performance with minimal cost. For small-batch production runs (10–50 units), the 10-piece or 20-piece packs offer better per-unit value. For higher-volume production or stocking a workshop, the 50-piece or 100-piece packs provide the most economical per-unit pricing. All pack sizes ship the same spring specification — only quantity differs.
The variant name follows the format: Wire Diameter × Small OD / Large OD × Free Length, all in millimeters. For example, "1x7/14x12" means: wire diameter = 1 mm, small OD = 7 mm, large OD = 14 mm, free length = 12 mm. Use these four dimensions to match the spring to your seat, bore, and travel requirements.
