Compression Pressure Spring Wireφ 2mm Length 10~200mm Stainless Steel OD 12~18mm

Measure the bore or guide rod your spring will seat in. For a bore-guided spring, the OD should be 1–2mm smaller than the bore ID to allow free movement. For a rod-guided spring, the spring ID (OD minus 2× wire diameter) should be 1–2mm larger than the rod OD. Use the variant selector to pick from 12mm, 14mm, 15mm, 16mm, or 18mm OD.

Free length is the uncompressed length of the spring. Choose a free length that is longer than your required working length by at least the travel distance you need. For example, if you need 30mm of compression travel and your working length is 40mm, select a free length of at least 70mm. Available lengths run from 10mm to 200mm in this product family.

Spring rate (force per unit of compression) depends on wire diameter, OD, and number of active coils — which varies by free length. With a 2mm wire and ODs of 12–18mm, these springs are suited for light-to-medium loads typical in DIY fixtures, return mechanisms, and prototype assemblies. For exact load requirements, contact us to confirm the spring rate for your specific variant.

These springs are made from 304 stainless steel, which offers good corrosion resistance in humid, mildly acidic, and oily environments. They are not recommended for prolonged exposure to chloride-rich environments (such as saltwater) or strong acids, where 316 stainless would be more appropriate. For most indoor workshop and automation applications, 304 stainless provides reliable long-term performance.

Yes. These compression springs are commonly used in 3D printer bed leveling systems, CNC tool holders, and similar precision DIY equipment. Select the OD that matches your spring pocket or guide rod, and choose a free length that provides the correct preload and travel for your setup. The closed-and-ground ends ensure flat, stable seating on standard spring pockets.

Pack quantity varies by variant and is shown in the "Length L & QTY (pcs)" option selector. Shorter lengths (10–50mm) are typically available in packs of 4 or 12. Longer lengths (60–200mm) are available in packs of 1 or 3. Select the combination of length and quantity that suits your project needs.

Closed-and-ground ends have the terminal coils closed (touching the adjacent coil) and then ground flat. This creates a perpendicular, flat bearing surface that seats stably in spring pockets and reduces lateral buckling under load — important for precision fixtures and guided applications. Open-end springs lack this flat surface and are better suited for applications where end geometry is less critical.