Compression Spring Spring Steel Pressure Coil 1.2mm Wire OD 5-20mm 10-100mm Shop

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Compression Spring Spring Steel Pressure Coil 1.2mm Wire OD 5-20mm 10-100mm Shop

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By HomeDIYer®

Size: 1.2mm X 6mm X 10mm

Quantitys: 10 PCS

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$3.93 USD

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In stock (500 units), ready to be shipped

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Compression Spring 1.2mm Wire — Reliable Spring Steel Coil for Mechanical Assemblies

When a project demands consistent return force and dimensional accuracy, finding the right compression spring can be a frustrating bottleneck for engineers, hobbyists, and small-batch manufacturers alike. These 1.2mm wire diameter compression springs are designed to eliminate that friction, offering a broad matrix of outer diameters (6–22mm) and free lengths (10–100mm) so you can match the exact spring rate your application requires without custom tooling.

Each spring is formed from spring steel wire with a nominal wire diameter of 1.2mm (approximately 0.047 in). Outer diameters span 6mm to 22mm (roughly 0.24–0.87 in), and free lengths range from 10mm to 100mm (0.39–3.94 in). The coil body features a consistent pitch throughout the active coils, with closed and ground ends on most standard sizes to ensure flat seating and stable load transfer.

Typical use cases include DIY mechanical assemblies requiring controlled return force, robotics and automation jigs where repeatable spring deflection is critical, and small-batch manufacturing fixtures such as clamps, latches, and valve mechanisms that need a compact, corrosion-aware spring solution.

⚙️ Compatibility: Suitable for spring pockets, guide rods, and plunger assemblies with bore diameters matching the selected OD. Verify free length and spring rate against your load requirements before ordering.

✅ Key Features of These Compression Springs

🔩 1.2mm Wire Diameter
Consistent wire gauge across all size variants ensures predictable spring rate calculations for your design.

📐 Wide Size Matrix
OD options from 6mm to 22mm and free lengths from 10mm to 100mm cover a broad range of mechanical applications in a single product family.

🛡️ Spring Steel Construction
Formed from spring steel wire for reliable elastic return and resistance to permanent set under repeated compression cycles.

📦 10-Piece Pack
Each variant ships as a 10-piece set, giving you spares for prototyping, testing, and production runs without over-ordering.

🎯 Closed & Ground Ends
Flat end coils provide stable seating in spring pockets and against flat surfaces, reducing lateral deflection under load.

⚡ Broad Application Range
Suited for robotics jigs, DIY fixtures, valve mechanisms, clamps, and latches where a compact coil spring with defined geometry is required.

📐 Technical Specifications — Compression Spring

Wire Diameter	1.2mm (0.047 in)
Outer Diameter (OD)	6mm – 22mm (0.24 – 0.87 in) — See variant options
Free Length	10mm – 100mm (0.39 – 3.94 in) — See variant options
Material	Spring Steel
End Type	Closed (typically ground on standard sizes)
Coil Direction	Right-hand wound (standard)
Spring Rate	See variant options
Surface Finish	See variant options
Pack Quantity	10 PCS per order
Weight (per pack)	See variant options

❓ Frequently Asked Questions

How do I choose the right OD and free length for my application?

Measure the bore or guide rod diameter in your assembly first. The spring OD should be slightly smaller than the bore (typically 0.2–0.5mm clearance) or slightly larger than the guide rod. For free length, select a spring that is 20–30% longer than your required compressed length to stay within the elastic range and avoid coil bind.

What is the spring rate of these compression springs?

Spring rate depends on the specific OD and free length combination selected. It is calculated from wire diameter, coil diameter, number of active coils, and material modulus. Because this product covers a wide size matrix, exact spring rate values vary by variant. If you need a specific rate, contact us with your OD, free length, and load requirements and we can help identify the closest match.

Are these springs corrosion resistant?

These springs are made from spring steel, which offers good mechanical properties but has moderate corrosion resistance in dry indoor environments. For outdoor, humid, or chemically exposed applications, consider applying a light coat of oil or grease, or contact us about stainless steel alternatives if your environment demands higher corrosion resistance.

Can I use these springs in robotics and automation projects?

Yes. The consistent wire diameter and closed-end geometry make these springs well-suited for robotics jigs, gripper return mechanisms, and automation fixtures where repeatable deflection and stable seating are important. Select the OD and free length that match your guide rod or pocket dimensions and verify the spring rate against your required actuation force.

What does the size format (e.g., 1.2mm X 8mm X 30mm) mean?

The three numbers represent: Wire Diameter × Outer Diameter × Free Length. So 1.2mm X 8mm X 30mm means a spring with 1.2mm wire, 8mm outer diameter, and 30mm free (uncompressed) length. Always confirm all three dimensions match your design before ordering.

Why buy a 10-piece pack instead of individual springs?

Springs are small consumable components that are easy to lose during assembly and may need replacement over time. A 10-piece pack gives you extras for prototyping, testing different compression depths, and keeping spares on hand — reducing downtime when a spring needs to be swapped out in a production fixture or DIY build.

Are these suitable for high-temperature environments?

Standard spring steel maintains its elastic properties in typical ambient conditions (up to approximately 120°C / 250°F). For applications involving sustained elevated temperatures above this range, the spring may experience stress relaxation and reduced return force over time. Contact us to confirm suitability for your specific thermal environment.

🛒 Select your size (OD × Free Length) and quantity above, then add to cart.