Compression Spring 2mm Wire Dia OD 12-20mm Spring Steel Pressure-Coil Springs

Measure the inner diameter of the bore or housing the spring will sit in, then select an OD that provides a small clearance (typically 0.5–1mm) to allow free movement without binding. If the spring rides on a guide rod, the rod diameter should be smaller than the spring's inner diameter (OD minus twice the wire diameter, so approximately OD − 4mm for this 2mm wire series).

Free length is the uncompressed length of the spring. Choose a free length that is longer than your required working length by enough to generate the preload or working force your application needs. If you need a specific spring rate or load at a given deflection, contact us to confirm before ordering.

Load capacity depends on the specific OD and free length combination selected. Spring steel provides reliable elastic return under repeated cycling for light-to-medium loads typical of DIY automation, jigs, and fixture applications. For precise load or spring rate data for a specific variant, contact us to confirm.

Spring steel offers good mechanical properties but has limited inherent corrosion resistance compared to stainless steel. For indoor, dry, or lightly oiled environments these springs perform reliably. For outdoor, humid, or chemically exposed environments, consider applying a light protective coating or contact us about alternative material options.

Yes — the OD range of 12–20mm and 2mm wire diameter are common sizes used in standard spring guides, bores, and housings found in DIY automation components, mechanical jigs, and light machinery. Always verify the specific OD and inner diameter clearance against your housing dimensions before assembly.

These compression springs are suitable for light-duty automation applications such as return mechanisms, actuator preloads, and clamping fixtures in DIY and small workshop equipment. For high-cycle industrial machinery or safety-critical applications, verify the spring rate and fatigue life requirements against your specific duty cycle.

Order 1–2 pieces for prototyping or single-unit repairs where you need to verify fit before committing. Order 5 or 10 pieces for small production runs, workshop stock, or projects with multiple spring positions. Larger packs offer a lower per-unit cost and ensure you have spares on hand.