Compression Spring Spring Steel Pressure Coil 1.2mm Wire OD 5-25mm 5-100mm Heavy

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Sale price$5.83 USD
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In stock (500 units), ready to be shipped

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Description

1.2mm Wire Compression Springs — Heavy-Duty Spring Steel Pressure Coils for Demanding Applications

When a worn-out spring causes a mechanism to fail mid-project — whether it's a jig, a fixture, a valve assembly, or a custom tool — finding a replacement with the exact wire diameter and free length can be a real challenge. These 1.2mm wire compression springs are designed for makers, engineers, and workshop professionals who need reliable, consistent spring force across a wide range of sizes without sourcing from multiple suppliers.

Each spring is formed from spring steel wire with a nominal wire diameter of 1.2mm. The outer diameter (OD) ranges from 6mm to 22mm (approximately 0.24" to 0.87"), and the free length spans from 10mm to 100mm (approximately 0.39" to 3.94"). The coil pitch and end style are consistent with standard open-end compression spring geometry. Each pack contains 10 pieces of the selected size.

These compression springs are well-suited for light-to-medium load applications such as spring-loaded clamps and fixtures, return mechanisms in DIY automation projects, valve and plunger assemblies in fluid handling, and custom tooling or jig components requiring consistent spring-back force. The wide size matrix — spanning wire OD 6–22mm and lengths 10–100mm — makes them a practical stock item for any workshop or prototyping bench.

⚙️ Compatibility: Suitable for standard compression spring seats and bores sized to accept OD 6mm–22mm springs. Verify bore clearance and seat depth before ordering. Select your size from the variant options above.

✅ Key Features of These 1.2mm Wire Compression Springs

🔩 1.2mm Wire Diameter

Consistent 1.2mm wire cross-section delivers predictable spring rate and load capacity across all size variants in this range.

📐 Wide Size Matrix

OD from 6mm to 22mm and free length from 10mm to 100mm — over 200 size combinations available to match your exact application requirement.

🏗️ Spring Steel Construction

Formed from spring steel wire for reliable elastic recovery and resistance to permanent set under repeated compression cycles.

📦 10 PCS per Pack

Each order ships as a pack of 10 identical springs, giving you spares for prototyping, testing, or batch assembly without over-ordering.

🔄 Open-End Coil Geometry

Standard open-end compression spring profile fits conventional spring seats and guide pins without modification in most DIY and light industrial setups.

🛠️ Workshop-Ready Stock Item

The broad size range makes these springs a practical bench stock for repair, prototyping, and custom tooling — reducing downtime when a spring needs replacing on the spot.

📐 Technical Specifications — Compression Springs

Wire Diameter 1.2mm (0.047")
Outer Diameter (OD) 6mm – 22mm (0.24" – 0.87") — See variant options
Free Length 10mm – 100mm (0.39" – 3.94") — See variant options
Material Spring Steel
Spring Type Compression (Open End)
Coil Direction See variant options
Surface Finish See variant options
Quantity per Pack 10 PCS
Load Rating See variant options
Spring Rate See variant options

❓ Frequently Asked Questions

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

Measure the bore or housing that the spring sits in — the spring OD should be slightly smaller than the bore to allow free movement. For the free length, choose a spring that is longer than your required compressed length so it still exerts force at full compression. If you are replacing an existing spring, measure its OD, wire diameter, and free length directly.

What load can a 1.2mm wire compression spring handle?

Load capacity depends on the OD and free length of the specific variant. Shorter springs with smaller OD will have a higher spring rate (stiffer), while longer springs with larger OD will be softer. For precise load calculations, use the spring rate formula or contact us with your application requirements.

Are these springs corrosion resistant?

These springs are made from spring steel, which offers good mechanical properties but has limited corrosion resistance compared to stainless steel. For outdoor, wet, or chemically exposed environments, consider applying a protective coating or selecting stainless steel springs instead. For dry indoor applications, spring steel performs reliably.

Will these springs fit standard spring guide pins and seats?

Yes — the open-end coil geometry is compatible with standard guide pins and spring seats. Ensure the guide pin diameter is smaller than the spring's inner diameter (ID = OD minus 2× wire diameter, so ID = OD − 2.4mm) to allow free travel without binding.

Can I use these springs in automated or repetitive-cycle machinery?

These springs are suitable for light-to-medium duty repetitive applications such as return mechanisms, clamps, and plunger assemblies. For high-cycle industrial machinery with heavy loads, verify the spring rate and fatigue life against your cycle count requirements. Ordering a pack of 10 allows you to test and replace as needed during prototyping.

How do I calculate the inner diameter (ID) of a specific variant?

The inner diameter is calculated as: ID = OD − (2 × wire diameter). For these springs, ID = OD − 2.4mm. For example, a 10mm OD spring has an ID of approximately 7.6mm. Use this to size your guide pin or mandrel correctly.

What is the difference between the various OD sizes in this listing?

Each OD size produces a different spring rate and load capacity at the same wire diameter and length. A larger OD spring is generally softer (lower spring rate) than a smaller OD spring of the same length and wire diameter. Choose based on the force you need at your working deflection, not just the physical fit.

🛒 Select your Size (OD × Length) and Quantity above, then add to cart.

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