Compression Spring 0.8mm 0.9mm 1.0mm A2 Stainless Steel Small Pressure Springs

Start with the bore or housing diameter in your assembly — the spring's outer diameter must be smaller than the bore with enough clearance (typically 0.5–1 mm) to allow free compression. Then select the wire diameter based on the load you need: a thicker wire (1.0 mm) produces a stiffer spring for a given outer diameter and free length, while a thinner wire (0.8 mm) gives a lighter spring rate. If you have a target spring rate or load specification, use a spring rate calculator with the dimensions to verify before ordering.

Load capacity depends on the specific combination of wire diameter, outer diameter, free length, and deflection distance. For the wire diameters in this listing (0.8–1.0 mm), these are light-duty springs suited for applications in the range of a few Newtons to tens of Newtons depending on the variant. For precise load values, contact us with your required spring rate and deflection, and we can confirm the appropriate variant.

Yes. A2 (304) stainless steel offers good resistance to atmospheric corrosion, moisture, and mild chemical exposure. These springs are appropriate for outdoor enclosures, marine-adjacent environments (non-saltwater immersion), and humid industrial settings. For direct saltwater or highly acidic environments, A4 (316) stainless steel would be a more suitable choice.

Wire diameter directly affects spring stiffness (spring rate) and load capacity. A 1.0 mm wire diameter spring will be stiffer and carry more load than a 0.8 mm wire spring of the same outer diameter and free length. Choose 0.8 mm for very light-load applications such as small switches or sensor return mechanisms; choose 1.0 mm where a firmer return force is needed. The 0.9 mm option sits between the two for moderate-load scenarios.

Absolutely. These small compression springs are widely used in 3D printer extruder tensioners, bed leveling mechanisms, CNC tool holders, and robotic gripper return mechanisms. The stainless steel construction handles the vibration and repeated cycling typical of these applications. Verify the outer diameter fits your specific component bore and that the free length and spring rate match your design requirements.

Each variant is sold in a pack of 10 pieces (10 PCS). You can add multiple quantities at checkout to receive multiples of 10 springs of the same specification. This makes it easy to stock spares for prototyping, production runs, or maintenance kits without committing to large bulk quantities.

Measure three key dimensions: (1) the wire diameter using a micrometer or digital caliper — this is the thickness of the wire itself; (2) the outer diameter — the widest point of the coil; and (3) the free length — the uncompressed length of the spring. Match these measurements to the variant options in this listing. If your spring is slightly compressed in its resting position in the assembly, measure it removed from the assembly for an accurate free length reading.