Spring Steel Compression Spring Pressure Coil 1.5mm Wire OD 5-18mm 10-150mm DIY

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Sale price$11.36 USD
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In stock (500 units), ready to be shipped

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Description

Spring Steel Compression Springs — Reliable Coil Force for DIY Mechanisms

When a loose-fitting mechanism, a poorly tensioned jig, or a worn-out return spring brings your project to a halt, you need a replacement that fits precisely and holds its load cycle after cycle. These spring steel compression springs are designed for makers, hobbyists, and small workshop operators who demand consistent spring force without over-engineering their build.

Each spring is wound from 1.5mm spring steel wire with an outer diameter (OD) ranging from 5mm to 18mm (approximately 0.20 in to 0.71 in) and a free length ranging from 10mm to 150mm (approximately 0.39 in to 5.91 in). The coil pitch and wire diameter are consistent across the range, ensuring predictable deflection behavior across all size variants.

These compression springs are well-suited for DIY automation jigs, custom tooling fixtures, spring-loaded clamps, and light mechanical assemblies. Whether you are building a spring-return lever, a pressure-loaded gate latch, or a custom coil spring replacement for small equipment, this range covers the most common metric sizes used in maker and workshop applications.

⚙️ Compatible with standard metric spring seats and bores. Verify your bore ID and seat depth before selecting OD and free length.

✅ Key Features of These Compression Springs

🔩 1.5mm Spring Steel Wire — Consistent wire gauge across all variants for predictable spring rate and deflection behavior in DIY and light industrial applications.
📐 Wide OD Range: 5mm–18mm — Covers the most common metric bore sizes from 5mm (0.20 in) to 18mm (0.71 in), reducing the need to source multiple suppliers.
📏 Free Length 10mm–150mm — Select from short 10mm (0.39 in) springs for compact mechanisms up to 150mm (5.91 in) for longer-travel return applications.
🛡️ Spring Steel Construction — Wound from carbon spring steel for good elastic memory and resistance to permanent set under repeated compression cycles.
📦 10-Piece Pack — Each order includes 10 springs of your selected size, giving you spares for prototyping, testing, and replacement without reordering.
🔧 Metric Sizing for Maker Projects — Dimensioned in standard metric units, compatible with M-series fastener assemblies, 3D-printed spring seats, and CNC-machined fixtures.

📐 Technical Specifications — Compression Springs

Wire Diameter 1.5mm (0.059 in)
Outer Diameter (OD) 5mm–18mm (0.20 in–0.71 in) — See variant options
Free Length 10mm–150mm (0.39 in–5.91 in) — See variant options
Material Carbon spring steel
Spring Type Compression (closed ends, not ground)
Coil Direction Right-hand wound
Surface Finish See variant options
Spring Rate See variant options
Max Load Capacity See variant options
Quantity per Pack 10 PCS

❓ Frequently Asked Questions

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

Measure the bore or spring seat ID in your assembly — your spring OD should be slightly smaller than the bore ID to allow free movement. For free length, measure the uncompressed gap your spring needs to fill, then add your required travel distance. Select the next available size up if your exact measurement falls between variants.

What is the spring rate of these compression springs?

Spring rate varies by OD and free length combination. Shorter springs with smaller OD will generally have a higher spring rate (stiffer), while longer springs with larger OD will be softer. If you need a specific spring rate value, please contact us with your selected size and we can provide further guidance.

Are these springs corrosion resistant?

These springs are made from carbon spring steel, which provides good mechanical properties but has limited corrosion resistance in wet or outdoor environments without additional protection. For applications exposed to moisture, consider applying a light coat of oil or using them in a protected enclosure. If corrosion resistance is a primary requirement, contact us to confirm finish options.

What applications are these compression springs suitable for?

These springs are suitable for DIY mechanisms, spring-return levers, jig fixtures, custom tooling, light-duty clamps, 3D-printed assemblies, and small equipment repair. They are not rated for heavy industrial or safety-critical load-bearing applications. Always verify the spring rate and load capacity match your design requirements before use.

Can I use these springs in a 3D-printed spring seat?

Yes. These metric-dimensioned springs are commonly used with 3D-printed spring seats and housings. Ensure your printed bore ID is at least 0.3–0.5mm larger than the spring OD to allow free compression without binding. For FDM-printed seats, a slight clearance fit is recommended to account for layer tolerance.

Why should I buy a 10-pack instead of individual springs?

Buying in a 10-pack gives you spares for prototyping and testing without reordering delays. Small compression springs are easy to lose during assembly, and having extras on hand lets you iterate on your design without stopping your build. The 10-pack format is the standard quantity for this product range.

Are the ends of these springs closed or open?

These springs have closed (but not ground) ends, which provides a flat seating surface suitable for most DIY spring seats and fixtures. Closed ends help the spring sit squarely in its seat and reduce lateral deflection under load compared to open-end springs.

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

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