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When a project demands reliable spring force over a fixed travel distance, finding the right compression spring in the exact outer diameter and wire gauge can be a frustrating search. Engineers, makers, and maintenance technicians working on CNC machines, robotics, automotive assemblies, and industrial equipment need springs that hold their rated load without set or fatigue. These 200mm long pressure coiled springs are stocked in a wide range of outer diameters and wire diameters to match your exact specification.
Each spring is manufactured from spring steel wire with a consistent coil pitch along the full 200mm (approximately 7.87 inches) body length. Outer diameters span from 12mm (0.47 in) to 90mm (3.54 in), and wire diameters range from 2mm (0.079 in) to 14mm (0.55 in). The open-end coil construction allows straightforward installation into bores or over shafts without special tooling.
Typical use cases include compression spring replacement in industrial machinery, return-force elements in CNC router Z-axis assemblies, load-bearing springs in automotive suspension jigs, and tension-balancing components in robotic arm joints. Long-tail applications such as "200mm compression spring OD 25mm" or "heavy duty coil spring wire diameter 4mm" are well served by the variant matrix available on this listing.
| Type | Compression Spring (Pressure Coiled) |
|---|---|
| Free Length | 200mm (7.87 in) |
| Outer Diameter (OD) | 12mm – 90mm (0.47 – 3.54 in) — See variant options |
| Wire Diameter | 2mm / 2.3mm / 2.5mm / 2.6mm / 3.5mm / 4mm / 7mm / 8mm / 10mm / 12mm / 14mm — See variant options |
| Material | Spring Steel |
| End Type | Open Ends |
| Coil Direction | Right-hand (standard) |
| Surface Finish | See variant options |
| Spring Rate | See variant options |
| Pack Quantity | 1 pc / 2 pcs / 5 pcs — See variant options |
Measure the bore or housing inner diameter (ID) that the spring will sit inside, then select a spring OD that is 1–3mm smaller than the bore ID to allow free movement without binding. If the spring goes over a shaft, choose an OD that is 1–3mm larger than the shaft OD. Use the "Diameter & Qty" variant selector to pick your target OD from the available range of 12mm to 90mm.
Wire diameter directly affects spring rate and maximum load capacity. Thinner wire (2–2.6mm) produces softer springs suited to light-duty return mechanisms and instrument applications. Mid-range wire (3.5–4mm) covers general industrial and automotive jig use. Heavier wire (7–14mm) is appropriate for high-load structural or heavy machinery applications. If you have a specific load and deflection target, contact us to confirm the best wire diameter for your design.
These springs are manufactured from spring steel, which provides good mechanical properties but has moderate corrosion resistance in ambient indoor conditions. For outdoor, high-humidity, or chemically aggressive environments, consider applying a protective coating after installation (e.g., light oil, zinc spray, or powder coat). If you require stainless steel springs for corrosive environments, please contact us to confirm availability.
The pack quantity is shown in the "Diameter & Qty (pcs)" variant option alongside the OD. Smaller wire diameters (2–2.6mm) are typically available in 2-piece or 5-piece packs, while larger wire diameters (3.5mm and above) are often sold as single pieces due to their higher individual weight and cost. Select the pack size that matches your project quantity to avoid ordering multiple listings.
Yes. These 200mm compression springs are well suited to CNC router Z-axis return mechanisms, robotic arm counterbalance assemblies, and linear actuator return systems. For CNC applications, the 2–4mm wire diameter range in OD 16–40mm is commonly used. For heavier robotic joints, the 7–14mm wire diameter variants in larger ODs provide the higher spring rates typically required. Verify the spring rate against your actuator force budget before finalizing your selection.
Check three key dimensions: (1) Free length — this spring is 200mm uncompressed; ensure your assembly has sufficient clearance. (2) Outer diameter — confirm the OD fits inside your bore or clears your shaft as described above. (3) Wire diameter — confirm the wire gauge matches your load and deflection requirements. If you have an engineering drawing or existing spring to match, feel free to contact us with the part details for confirmation before ordering.
Deflection range depends on wire diameter, OD, and the number of active coils. As a conservative guideline, compression springs should not be compressed beyond 70–80% of their free length in service to avoid coil bind and permanent set. For a 200mm spring, this means a working compressed length of approximately 40–60mm minimum. For precise deflection and spring rate data for a specific variant, contact us to confirm.
